From e4bb1066b1b55c265ed773c46bdcff68a6814c87 Mon Sep 17 00:00:00 2001
From: Soeren Domroes <sdo@informatik.uni-kiel.de>
Date: Mon, 2 Mar 2026 10:54:47 +0100
Subject: [PATCH 01/19] build(gradle): start gradle upgrade

---
 backend                                  |  2 +-
 build.gradle.kts                         | 41 +++++++++++++-----------
 gradle/wrapper/gradle-wrapper.properties |  2 +-
 3 files changed, 25 insertions(+), 20 deletions(-)

diff --git a/backend b/backend
index e2a37e1..c390729 160000
--- a/backend
+++ b/backend
@@ -1 +1 @@
-Subproject commit e2a37e18b3ca4929003ed2d56e43d492ee9caff9
+Subproject commit c390729b49d319d56841d39cb6fe6c14044d0aa1
diff --git a/build.gradle.kts b/build.gradle.kts
index c249214..2f8ad20 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,22 +1,23 @@
 import org.gradle.internal.os.OperatingSystem
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+import org.gradle.process.ExecOperations
 import java.util.Properties
 
-val minJavaVersion = JavaVersion.VERSION_11
+val minJavaVersion = JavaVersion.VERSION_17
 plugins {
-    val minJavaVersion = JavaVersion.VERSION_11 // Declared twice because plugins block has its own scope
+    val minJavaVersion = JavaVersion.VERSION_17 // Declared twice because plugins block has its own scope
     require(JavaVersion.current() >= minJavaVersion) {
         "Building requires at least JDK $minJavaVersion - please look into the README"
     }
     
     application
-    kotlin("jvm") version "1.9.25"
+    kotlin("jvm") version "2.3.0"
     id("idea")
     id("org.openjfx.javafxplugin") version "0.1.0"
-    id("com.github.johnrengelman.shadow") version "6.1.0"
+    id("com.gradleup.shadow") version "9.3.1"
     
-    id("com.github.ben-manes.versions") version "0.47.0"
-    id("se.patrikerdes.use-latest-versions") version "0.2.18"
+    id("com.github.ben-manes.versions") version "0.53.0"
+    id("se.patrikerdes.use-latest-versions") version "0.2.19"
 }
 
 idea {
@@ -44,7 +45,7 @@ version = try {
 println("Current version: $version (Java version: ${JavaVersion.current()})")
 
 application {
-    mainClassName = "sc.gui.GuiAppKt" // needs shadow-update which needs gradle update to 7.0
+    mainClass.set("sc.gui.GuiAppKt") // needs shadow-update which needs gradle update to 7.0
 }
 
 repositories {
@@ -92,14 +93,14 @@ tasks {
         }
     }
     withType<KotlinCompile> {
-        kotlinOptions {
-            jvmTarget = minJavaVersion.toString()
-            freeCompilerArgs = listOf("-Xjvm-default=all")
+        compilerOptions {
+            jvmTarget.set(org.jetbrains.kotlin.gradle.dsl.JvmTarget.fromTarget(minJavaVersion.toString()))
+            freeCompilerArgs.addAll("-Xjvm-default=all")
         }
     }
     
     withType<Jar> {
-        manifest.attributes["Main-Class"] = application.mainClassName
+        manifest.attributes["Main-Class"] = application.mainClass.get()
     }
     
     javafx {
@@ -113,7 +114,7 @@ tasks {
     }
     
     shadowJar {
-        destinationDirectory.set(buildDir)
+        destinationDirectory.set(layout.buildDirectory.asFile.get())
         archiveClassifier.set(
             "${
                 OperatingSystem.current().familyName.replace(
@@ -140,24 +141,28 @@ tasks {
     
     run.configure {
         dependsOn(backend.task(":server:makeRunnable"))
-        workingDir(buildDir.resolve("run"))
+        workingDir(layout.buildDirectory.asFile.get().resolve("run"))
         doFirst {
             workingDir.mkdirs()
         }
         args = System.getProperty("args", "").split(" ")
     }
     
-    val release by creating {
+    val release by registering {
         dependsOn(clean, check)
         group = "distribution"
         description = "Create and push a tagged commit matching the backend version"
         doLast {
             val desc = project.properties["m"]?.toString()
                        ?: throw InvalidUserDataException("Das Argument -Pm=\"Beschreibung dieser Version\" wird benötigt")
-            exec { commandLine("git", "add", "CHANGELOG.md") }
-            exec { commandLine("git", "commit", "-m", "release: v$versionFromBackend") }
-            exec { commandLine("git", "tag", versionFromBackend, "-m", desc) }
-            exec { commandLine("git", "push", "--follow-tags", "--recurse-submodules=on-demand") }
+            val processHelper: (Array<String>) -> Unit = { args ->
+                val process = ProcessBuilder(*args).start()
+                process.waitFor()
+            }
+            processHelper(arrayOf("git", "add", "CHANGELOG.md"))
+            processHelper(arrayOf("git", "commit", "-m", "release: v$versionFromBackend"))
+            processHelper(arrayOf("git", "tag", versionFromBackend, "-m", desc))
+            processHelper(arrayOf("git", "push", "--follow-tags", "--recurse-submodules=on-demand"))
         }
     }
 }
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index c51cbf1..e69d040 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.9.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.3-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

From 016aa1857cd56b2d21b405581e72d9c7eb62c3f7 Mon Sep 17 00:00:00 2001
From: xeruf <git@melonion.me>
Date: Mon, 2 Mar 2026 13:34:24 +0100
Subject: [PATCH 02/19] build(gradle): adjust for gradle 8

---
 backend             |  2 +-
 build.gradle.kts    | 28 +++++++++++++---------------
 settings.gradle.kts | 14 +-------------
 3 files changed, 15 insertions(+), 29 deletions(-)

diff --git a/backend b/backend
index c390729..186accd 160000
--- a/backend
+++ b/backend
@@ -1 +1 @@
-Subproject commit c390729b49d319d56841d39cb6fe6c14044d0aa1
+Subproject commit 186accdafea70f32a72a048e00a39f0226882b02
diff --git a/build.gradle.kts b/build.gradle.kts
index 2f8ad20..380a0da 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,11 +1,11 @@
 import org.gradle.internal.os.OperatingSystem
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
-import org.gradle.process.ExecOperations
 import java.util.Properties
 
-val minJavaVersion = JavaVersion.VERSION_17
+val minJavaVersion = JavaVersion.VERSION_11
 plugins {
-    val minJavaVersion = JavaVersion.VERSION_17 // Declared twice because plugins block has its own scope
+    val minJavaVersion = JavaVersion.VERSION_11 // Declared twice because plugins block has its own scope
     require(JavaVersion.current() >= minJavaVersion) {
         "Building requires at least JDK $minJavaVersion - please look into the README"
     }
@@ -14,7 +14,7 @@ plugins {
     kotlin("jvm") version "2.3.0"
     id("idea")
     id("org.openjfx.javafxplugin") version "0.1.0"
-    id("com.gradleup.shadow") version "9.3.1"
+    id("com.gradleup.shadow") version "9.1.0"
     
     id("com.github.ben-manes.versions") version "0.53.0"
     id("se.patrikerdes.use-latest-versions") version "0.2.19"
@@ -45,7 +45,7 @@ version = try {
 println("Current version: $version (Java version: ${JavaVersion.current()})")
 
 application {
-    mainClass.set("sc.gui.GuiAppKt") // needs shadow-update which needs gradle update to 7.0
+    mainClass.set("sc.gui.GuiAppKt")
 }
 
 repositories {
@@ -73,9 +73,10 @@ dependencies {
     implementation("io.github.oshai", "kotlin-logging-jvm", "6.0.9") // TODO version 7 with kotlin 2
     
     implementation("software-challenge", "server")
+    implementation("software-challenge", "plugin2023")
     implementation("software-challenge", "plugin2024")
     implementation("software-challenge", "plugin2025")
-    implementation("software-challenge", "plugin")
+    implementation("software-challenge", "plugin2026")
     
     if(debug)
         implementation("com.tangorabox", "component-inspector-fx", "1.1.0")
@@ -94,7 +95,7 @@ tasks {
     }
     withType<KotlinCompile> {
         compilerOptions {
-            jvmTarget.set(org.jetbrains.kotlin.gradle.dsl.JvmTarget.fromTarget(minJavaVersion.toString()))
+            jvmTarget.set(JvmTarget.fromTarget(minJavaVersion.toString()))
             freeCompilerArgs.addAll("-Xjvm-default=all")
         }
     }
@@ -155,14 +156,11 @@ tasks {
         doLast {
             val desc = project.properties["m"]?.toString()
                        ?: throw InvalidUserDataException("Das Argument -Pm=\"Beschreibung dieser Version\" wird benötigt")
-            val processHelper: (Array<String>) -> Unit = { args ->
-                val process = ProcessBuilder(*args).start()
-                process.waitFor()
-            }
-            processHelper(arrayOf("git", "add", "CHANGELOG.md"))
-            processHelper(arrayOf("git", "commit", "-m", "release: v$versionFromBackend"))
-            processHelper(arrayOf("git", "tag", versionFromBackend, "-m", desc))
-            processHelper(arrayOf("git", "push", "--follow-tags", "--recurse-submodules=on-demand"))
+            
+            providers.exec { commandLine("git", "add", "CHANGELOG.md") }
+            providers.exec { commandLine("git", "commit", "-m", "release: v$versionFromBackend") }
+            providers.exec { commandLine("git", "tag", versionFromBackend, "-m", desc) }
+            providers.exec { commandLine("git", "push", "--follow-tags", "--recurse-submodules=on-demand") }
         }
     }
 }
diff --git a/settings.gradle.kts b/settings.gradle.kts
index bebc179..0ebfb25 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -1,16 +1,4 @@
 rootProject.name = "software-challenge-gui"
 
 includeBuild("backend/gradle/custom-tasks")
-includeBuild("backend") {
-    // https://publicobject.com/2021/03/11/includebuild
-    dependencySubstitution {
-        substitute(module("software-challenge:plugin2024"))
-                .with(project(":plugin"))
-        substitute(module("software-challenge:plugin2025"))
-            .with(project(":plugin2025"))
-        substitute(module("software-challenge:plugin"))
-                .with(project(":plugin2026"))
-        substitute(module("software-challenge:server"))
-                .with(project(":server"))
-    }
-}
\ No newline at end of file
+includeBuild("backend")
\ No newline at end of file

From efb026d1bf1451e09633f67a243c37ed807b7c55 Mon Sep 17 00:00:00 2001
From: xeruf <git@melonion.me>
Date: Tue, 3 Mar 2026 10:31:09 +0100
Subject: [PATCH 03/19] build(gradle): document debug flag

---
 build.gradle.kts | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/build.gradle.kts b/build.gradle.kts
index 380a0da..dcb3f33 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -56,6 +56,7 @@ repositories {
     maven("https://jitpack.io")
 }
 
+// ./gradlew run -Pdebug for debug tools and logging
 val debug = project.hasProperty("debug")
 
 dependencies {
@@ -78,8 +79,10 @@ dependencies {
     implementation("software-challenge", "plugin2025")
     implementation("software-challenge", "plugin2026")
     
-    if(debug)
+    if(debug) {
+        // hold Ctrl to view component hierarchy and bounds
         implementation("com.tangorabox", "component-inspector-fx", "1.1.0")
+    }
 }
 
 tasks {
@@ -109,7 +112,8 @@ tasks {
         val mods = mutableListOf(
             "javafx.base", "javafx.controls", "javafx.fxml",
             "javafx.web", "javafx.media", "javafx.swing"
-        ) // included because of tornadofx already
+        )
+        // included because of tornadofx already
         // if(debug) mods.addAll(listOf("javafx.swing"))
         modules = mods
     }

From a3d1a083a25e95d20c3b2550e5f43b25cb5ae3b5 Mon Sep 17 00:00:00 2001
From: xeruf <git@melonion.me>
Date: Tue, 3 Mar 2026 10:33:37 +0100
Subject: [PATCH 04/19] build: update docs and flows

---
 .github/workflows/gradle.yml |  2 +-
 README.md                    | 19 ++++---------------
 backend                      |  2 +-
 build.gradle.kts             | 14 +++++++-------
 4 files changed, 13 insertions(+), 24 deletions(-)

diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
index b3cc2e0..5d95dc4 100644
--- a/.github/workflows/gradle.yml
+++ b/.github/workflows/gradle.yml
@@ -7,7 +7,7 @@ jobs:
       matrix:
         # https://docs.github.com/en/actions/using-jobs/using-a-matrix-for-your-jobs
         os: [ubuntu-latest, windows-latest, macos-latest]
-        jdk: [11]
+        jdk: [17, 24]
     steps:
     - uses: actions/checkout@v4
       with:
diff --git a/README.md b/README.md
index b141e81..bbd46d0 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 ## <a target="_blank" rel="noopener noreferrer" href="https://www.software-challenge.de"><img width="128" src="https://software-challenge.de/site/themes/freebird/img/logo.png" alt="Software-Challenge Logo"></a> Grafischer Spieleserver der Software-Challenge Germany ![.github/workflows/gradle.yml](https://github.com/software-challenge/gui/workflows/.github/workflows/gradle.yml/badge.svg)
 
 Dies ist die Grafische Oberfläche für die Software-Challenge Germany,
-seit Saison 2020/21 in Kotlin TornadoFX aufbauend auf JavaFX.
+seit Saison 2020/21 in Kotlin TornadoFX, aufbauend auf JavaFX.
 
 Nutzerdokumentation: https://docs.software-challenge.de/server.html
 
@@ -23,7 +23,7 @@ wird der Server auf diesem Port Verbindungen von Spielern erwarten.
 ### Kollaboration
 
 Unsere Commit-Messages folgen dem Muster `type(scope): summary`
-(siehe [Karma Runner Konvention](http://karma-runner.github.io/6.2/dev/git-commit-msg.html)),
+(siehe [Karma Runner Konvention](http://karma-runner.github.io/6.4/dev/git-commit-msg.html)),
 wobei die gängigen Scopes in [.dev/scopes.txt](.dev/scopes.txt) definiert werden.
 Nach dem Klonen mit git sollte dazu der hook aktiviert werden:
 
@@ -31,7 +31,7 @@ Nach dem Klonen mit git sollte dazu der hook aktiviert werden:
 
 Um bei den Branches die Übersicht zu behalten,
 sollten diese ebenfalls nach der Konvention benannt werden,
-z. B. könnte ein Branch mit einem Release-Fix für Gradle `chore/gradle/release-fix` heißen
+z. B. könnte ein Branch mit einem Release-Fix für Gradle `build/gradle/release-fix` heißen
 und ein Branch, der ein neues Login-Feature zur GUI hinzufügt, `feat/gui-login`.
 
 Wenn die einzelnen Commits eines Pull Requests eigenständig funktionieren,
@@ -40,15 +40,4 @@ ansonsten (gerade bei experimentier-Branches) ein squash merge,
 wobei der Titel des Pull Requests der Commit-Message entsprechen sollte.
 
 Detaillierte Informationen zu unserem Kollaborations-Stil
-findet ihr in der [Kull Konvention](https://kull.jfischer.org).
-
-### Java-Versionen und Abhängigkeiten
-
-Aktuell können die Backend-docs nur mit JDK 8 gebaut werden,
-dieses Projekt braucht jedoch für [tornadofx](https://github.com/edvin/tornadofx2)
-mindestens Java 11.
-Daher müssen die Releases separat gebaut werden.
-
-Tornadofx wird leider seit einigen Jahren nicht mehr entwickelt.
-Wir schauen gerade wie es da weitergeht.
-Eventuell ein eigener Fork.
+findet ihr in der [Kull Konvention](https://kull.jfischer.org).
\ No newline at end of file
diff --git a/backend b/backend
index 186accd..d5ae974 160000
--- a/backend
+++ b/backend
@@ -1 +1 @@
-Subproject commit 186accdafea70f32a72a048e00a39f0226882b02
+Subproject commit d5ae974203cd037a282a32e207ec9688daa50fd2
diff --git a/build.gradle.kts b/build.gradle.kts
index dcb3f33..790bfc3 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -3,9 +3,9 @@ import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 import java.util.Properties
 
-val minJavaVersion = JavaVersion.VERSION_11
+val minJavaVersion = JavaVersion.VERSION_17
 plugins {
-    val minJavaVersion = JavaVersion.VERSION_11 // Declared twice because plugins block has its own scope
+    val minJavaVersion = JavaVersion.VERSION_17 // Declared twice because plugins block has its own scope
     require(JavaVersion.current() >= minJavaVersion) {
         "Building requires at least JDK $minJavaVersion - please look into the README"
     }
@@ -14,7 +14,7 @@ plugins {
     kotlin("jvm") version "2.3.0"
     id("idea")
     id("org.openjfx.javafxplugin") version "0.1.0"
-    id("com.gradleup.shadow") version "9.1.0"
+    id("com.gradleup.shadow") version "9.3.2"
     
     id("com.github.ben-manes.versions") version "0.53.0"
     id("se.patrikerdes.use-latest-versions") version "0.2.19"
@@ -63,15 +63,15 @@ dependencies {
     implementation(kotlin("stdlib-jdk8"))
     
     implementation(kotlin("reflect"))
-
+    
+    implementation(files("./gradle/tornadofx2-21e933fd41.jar"))
     // implementation("no.tornado", "tornadofx", "2.0.0-SNAPSHOT") { exclude("org.jetbrains.kotlin", "kotlin-reflect") }
     // implementation("com.github.software-challenge.tornadofx2", "tornadofx2", "2.0.0")
     // implementation("com.github.edvin", "tornadofx2", "master-SNAPSHOT")
     // implementation("com.github.edvin", "tornadofx2", "21e933fd41")
-    implementation(files("./gradle/tornadofx2-21e933fd41.jar"))
 
-    implementation("ch.qos.logback", "logback-classic", "1.5.18")
-    implementation("io.github.oshai", "kotlin-logging-jvm", "6.0.9") // TODO version 7 with kotlin 2
+    implementation("ch.qos.logback", "logback-classic", "1.5.32")
+    implementation("io.github.oshai", "kotlin-logging-jvm", "8.0.01")
     
     implementation("software-challenge", "server")
     implementation("software-challenge", "plugin2023")

From c8bf5e665916e4d0971811b6a991fae7e058eed8 Mon Sep 17 00:00:00 2001
From: xeruf <git@melonion.me>
Date: Tue, 3 Mar 2026 10:33:52 +0100
Subject: [PATCH 05/19] fix: code deprecations

---
 build.gradle.kts                                      | 2 +-
 src/main/kotlin/sc/gui/AppStyle.kt                    | 2 +-
 src/main/kotlin/sc/gui/controller/ServerController.kt | 4 ++--
 src/main/kotlin/sc/gui/view/AppView.kt                | 4 ++--
 src/main/kotlin/sc/gui/view/ControlView.kt            | 4 ++--
 src/main/kotlin/sc/gui/view/game/HuIBoard.kt          | 2 +-
 6 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/build.gradle.kts b/build.gradle.kts
index 790bfc3..e4e09c0 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -99,7 +99,7 @@ tasks {
     withType<KotlinCompile> {
         compilerOptions {
             jvmTarget.set(JvmTarget.fromTarget(minJavaVersion.toString()))
-            freeCompilerArgs.addAll("-Xjvm-default=all")
+            //freeCompilerArgs.addAll("-jvm-default=all")
         }
     }
     
diff --git a/src/main/kotlin/sc/gui/AppStyle.kt b/src/main/kotlin/sc/gui/AppStyle.kt
index 01acab4..7371528 100644
--- a/src/main/kotlin/sc/gui/AppStyle.kt
+++ b/src/main/kotlin/sc/gui/AppStyle.kt
@@ -22,7 +22,7 @@ class AppStyle: Stylesheet() {
         
         const val pieceOpacity = 1.0
         
-        val fontSizeUnscaled = Font.getDefault().also { logger.debug("System Font: $it") }.size.pt
+        val fontSizeUnscaled = Font.getDefault().also { logger.debug { "System Font: $it" } }.size.pt
         val fontSizeRegular = fontSizeUnscaled * AppModel.scaling.value
         val fontSizeSmall = fontSizeRegular * 0.6
         val fontSizeBig = fontSizeRegular * 1.5
diff --git a/src/main/kotlin/sc/gui/controller/ServerController.kt b/src/main/kotlin/sc/gui/controller/ServerController.kt
index 0b8c741..f67f09c 100644
--- a/src/main/kotlin/sc/gui/controller/ServerController.kt
+++ b/src/main/kotlin/sc/gui/controller/ServerController.kt
@@ -1,7 +1,7 @@
 package sc.gui.controller
 
 import ch.qos.logback.classic.LoggerContext
-import ch.qos.logback.core.util.StatusPrinter
+import ch.qos.logback.core.util.StatusPrinter2
 import org.slf4j.LoggerFactory
 import sc.server.Configuration
 import sc.server.Lobby
@@ -13,7 +13,7 @@ class ServerController : Controller() {
     fun startServer() {
         // output logback diagnostics to see if a logback.xml config was found
         val lc = LoggerFactory.getILoggerFactory() as LoggerContext
-        StatusPrinter.print(lc)
+        StatusPrinter2().print(lc)
 
         Configuration.loadServerProperties()
         Configuration.set(Configuration.SAVE_REPLAY, true)
diff --git a/src/main/kotlin/sc/gui/view/AppView.kt b/src/main/kotlin/sc/gui/view/AppView.kt
index 2098dda..396a469 100644
--- a/src/main/kotlin/sc/gui/view/AppView.kt
+++ b/src/main/kotlin/sc/gui/view/AppView.kt
@@ -29,13 +29,13 @@ class AppView: View("Software-Challenge Germany") {
             // TODO help menus keep disappearing and is offset
             menu(graphic = sochaIcon) {
                 item("Beenden", "Shortcut+Q").action {
-                    logger.debug("Quitting!")
+                    logger.debug { "Quitting!" }
                     Platform.exit()
                 }
                 item("Neues Spiel", "Shortcut+N") {
                     enableWhen(controller.model.currentView.isNotEqualTo(ViewType.GAME_CREATION))
                     action {
-                        logger.debug("New Game!")
+                        logger.debug { "New Game!" }
                         if(controller.model.currentView.get() == ViewType.GAME) {
                             confirm(
                                 header = "Neues Spiel anfangen",
diff --git a/src/main/kotlin/sc/gui/view/ControlView.kt b/src/main/kotlin/sc/gui/view/ControlView.kt
index d60c9b8..e05e2c3 100644
--- a/src/main/kotlin/sc/gui/view/ControlView.kt
+++ b/src/main/kotlin/sc/gui/view/ControlView.kt
@@ -55,7 +55,7 @@ class ControlView: View() {
                 }
             }
             val prev = button {
-                if(logger.isTraceEnabled)
+                if(logger.isTraceEnabled())
                     hoverProperty().listenImmediately {
                         logger.trace { "$this: $padding on hover $it" }
                     }
@@ -86,7 +86,7 @@ class ControlView: View() {
                 )
             }
             button {
-                if(logger.isTraceEnabled)
+                if(logger.isTraceEnabled())
                     hoverProperty().listenImmediately {
                         logger.trace { "$this: $padding on hover $it" }
                     }
diff --git a/src/main/kotlin/sc/gui/view/game/HuIBoard.kt b/src/main/kotlin/sc/gui/view/game/HuIBoard.kt
index ba21f91..e1a5224 100644
--- a/src/main/kotlin/sc/gui/view/game/HuIBoard.kt
+++ b/src/main/kotlin/sc/gui/view/game/HuIBoard.kt
@@ -286,7 +286,7 @@ class HuIBoard: GameBoard<GameState>() {
             putOnPosition(
                 Button(carrotCostString(car.amount)).apply {
                     fixHoverInsets()
-                    if(logger.isTraceEnabled)
+                    if(logger.isTraceEnabled())
                         hoverProperty().listenImmediately {
                             logger.trace { "$this: $padding on hover $it" }
                         }

From f3e3061adefc207cc3e2d59c11f0d8d01b93504e Mon Sep 17 00:00:00 2001
From: xeruf <git@melonion.me>
Date: Thu, 19 Mar 2026 10:34:36 +0100
Subject: [PATCH 06/19] build: update backend and run CI on all supported
 versions

---
 .github/workflows/gradle.yml |  6 +++---
 backend                      |  2 +-
 build.gradle.kts             | 11 ++++++-----
 3 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
index 5d95dc4..84e4dbc 100644
--- a/.github/workflows/gradle.yml
+++ b/.github/workflows/gradle.yml
@@ -7,7 +7,7 @@ jobs:
       matrix:
         # https://docs.github.com/en/actions/using-jobs/using-a-matrix-for-your-jobs
         os: [ubuntu-latest, windows-latest, macos-latest]
-        jdk: [17, 24]
+        jdk: [11, 17, 21]
     steps:
     - uses: actions/checkout@v4
       with:
@@ -55,7 +55,7 @@ jobs:
     - name: Upload jar as artifact
       uses: actions/upload-artifact@v4
       with:
-        name: software-challenge-gui-${{ github.sha }}-${{ matrix.os }}
+        name: software-challenge-gui-${{ github.sha }}-j${{ matrix.jdk }}-${{ matrix.os }}
         path: build/*.jar
   release:
     needs: [build, build-arm]
@@ -64,7 +64,7 @@ jobs:
     steps:
     - uses: actions/download-artifact@v4 # https://github.com/actions/download-artifact
       with:
-        pattern: software-challenge-gui-${{ github.sha }}-*
+        pattern: software-challenge-gui-${{ github.sha }}-j11-*
         path: build
         merge-multiple: true
     - name: Release ${{ github.ref }}
diff --git a/backend b/backend
index d5ae974..4727126 160000
--- a/backend
+++ b/backend
@@ -1 +1 @@
-Subproject commit d5ae974203cd037a282a32e207ec9688daa50fd2
+Subproject commit 47271265795645fc6a815114276ec9e6c8c4ca78
diff --git a/build.gradle.kts b/build.gradle.kts
index e4e09c0..26bb6b2 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -3,9 +3,10 @@ import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 import java.util.Properties
 
-val minJavaVersion = JavaVersion.VERSION_17
+val minJavaVersion = JavaVersion.VERSION_11
+val targetJavaVersion = JavaVersion.current() // minJavaVersion can be set for compatibility
 plugins {
-    val minJavaVersion = JavaVersion.VERSION_17 // Declared twice because plugins block has its own scope
+    val minJavaVersion = JavaVersion.VERSION_11 // Declared twice because plugins block has its own scope
     require(JavaVersion.current() >= minJavaVersion) {
         "Building requires at least JDK $minJavaVersion - please look into the README"
     }
@@ -14,7 +15,7 @@ plugins {
     kotlin("jvm") version "2.3.0"
     id("idea")
     id("org.openjfx.javafxplugin") version "0.1.0"
-    id("com.gradleup.shadow") version "9.3.2"
+    id("com.gradleup.shadow") version "9.1.0"
     
     id("com.github.ben-manes.versions") version "0.53.0"
     id("se.patrikerdes.use-latest-versions") version "0.2.19"
@@ -87,7 +88,7 @@ dependencies {
 
 tasks {
     compileJava {
-        options.release.set(minJavaVersion.majorVersion.toInt())
+        options.release.set(targetJavaVersion.majorVersion.toInt())
     }
     processResources {
         if(!debug)
@@ -98,7 +99,7 @@ tasks {
     }
     withType<KotlinCompile> {
         compilerOptions {
-            jvmTarget.set(JvmTarget.fromTarget(minJavaVersion.toString()))
+            jvmTarget.set(JvmTarget.fromTarget(targetJavaVersion.toString()))
             //freeCompilerArgs.addAll("-jvm-default=all")
         }
     }

From 2a0ffbfa7377cbfb20b008ad9dc550cd3c91c289 Mon Sep 17 00:00:00 2001
From: xeruf <git@melonion.me>
Date: Thu, 2 Apr 2026 12:11:38 +0200
Subject: [PATCH 07/19] build: update backend

---
 backend                                           | 2 +-
 src/main/kotlin/sc/gui/view/game/PenguinsBoard.kt | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/backend b/backend
index 4727126..d41ec23 160000
--- a/backend
+++ b/backend
@@ -1 +1 @@
-Subproject commit 47271265795645fc6a815114276ec9e6c8c4ca78
+Subproject commit d41ec23b91a56fc94232d467e83ec3e323c1b440
diff --git a/src/main/kotlin/sc/gui/view/game/PenguinsBoard.kt b/src/main/kotlin/sc/gui/view/game/PenguinsBoard.kt
index 50571cd..ef117e8 100644
--- a/src/main/kotlin/sc/gui/view/game/PenguinsBoard.kt
+++ b/src/main/kotlin/sc/gui/view/game/PenguinsBoard.kt
@@ -53,7 +53,7 @@ class PenguinBoard: View() {
         size.bind(Bindings.min(widthProperty(), heightProperty().multiply(1.6)))
         anchorpane {
             this.paddingAll = AppStyle.spacing
-            val stateListener = ChangeListener<GameState?> { _, oldState, state ->
+            val stateListener = ChangeListener<GameState?> { _, oldState: GameState?, state ->
                 clearTargetHighlights()
                 if(state == null) {
                     //children.remove(BOARD_SIZE.toDouble().pow(2).toInt(), children.size)

From 98c7090b851302424f3a24c6296aa506a357272b Mon Sep 17 00:00:00 2001
From: xeruf <git@melonion.me>
Date: Mon, 20 Apr 2026 08:56:54 +0200
Subject: [PATCH 08/19] build(gradle): update backend and distribution naming

---
 backend             | 2 +-
 build.gradle.kts    | 2 +-
 settings.gradle.kts | 4 +---
 3 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/backend b/backend
index d41ec23..04b1ecf 160000
--- a/backend
+++ b/backend
@@ -1 +1 @@
-Subproject commit d41ec23b91a56fc94232d467e83ec3e323c1b440
+Subproject commit 04b1ecff13cc8b9eddda7a365b3f2ce72f77ab01
diff --git a/build.gradle.kts b/build.gradle.kts
index 26bb6b2..d74fddb 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -36,7 +36,7 @@ val versionFromBackend by lazy {
     arrayOf("year", "minor", "patch").map { versions["socha.version.$it"].toString().toInt() }.joinToString(".") + suffix
 }
 
-group = "sc.gui"
+group = "software-challenge"
 version = try {
     Runtime.getRuntime().exec(arrayOf("git", "describe", "--tags"))
         .inputStream.reader().readText().trim().ifEmpty { null }
diff --git a/settings.gradle.kts b/settings.gradle.kts
index 0ebfb25..5a5913a 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -1,4 +1,2 @@
-rootProject.name = "software-challenge-gui"
-
 includeBuild("backend/gradle/custom-tasks")
-includeBuild("backend")
\ No newline at end of file
+includeBuild("backend")

From d6d5d2e0a8c22b7cd181c446d4f9d59121cfadc2 Mon Sep 17 00:00:00 2001
From: Jonas <jonas@sturmente.de>
Date: Wed, 27 May 2026 21:20:59 +0200
Subject: [PATCH 09/19] chore(vier-gewinnt): Setup GUI for connect 4

---
 .gitmodules                                   |  1 +
 backend                                       |  2 +-
 build.gradle.kts                              |  1 +
 src/main/kotlin/sc/gui/AppStyle.kt            | 26 ++++++++++++++++++-
 .../META-INF/services/sc.gui.view.GameBoard   |  2 +-
 5 files changed, 29 insertions(+), 3 deletions(-)

diff --git a/.gitmodules b/.gitmodules
index 9bc842f..ae0d755 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -2,6 +2,7 @@
 	path = backend
 	url = https://github.com/software-challenge/backend
 	shallow = true
+	branch = plugin/4-gewinnt
 [submodule ".idea"]
 	path = .idea
 	url = https://github.com/software-challenge/idea-config
diff --git a/backend b/backend
index 04b1ecf..5f739a2 160000
--- a/backend
+++ b/backend
@@ -1 +1 @@
-Subproject commit 04b1ecff13cc8b9eddda7a365b3f2ce72f77ab01
+Subproject commit 5f739a2425252f94f5df6921f06c4ae4dab93f51
diff --git a/build.gradle.kts b/build.gradle.kts
index d74fddb..b3a800a 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -79,6 +79,7 @@ dependencies {
     implementation("software-challenge", "plugin2024")
     implementation("software-challenge", "plugin2025")
     implementation("software-challenge", "plugin2026")
+    implementation("software-challenge", "plugin2098")
     
     if(debug) {
         // hold Ctrl to view component hierarchy and bounds
diff --git a/src/main/kotlin/sc/gui/AppStyle.kt b/src/main/kotlin/sc/gui/AppStyle.kt
index 7371528..5834724 100644
--- a/src/main/kotlin/sc/gui/AppStyle.kt
+++ b/src/main/kotlin/sc/gui/AppStyle.kt
@@ -157,7 +157,31 @@ class AppStyle: Stylesheet() {
             prefWidth = 100.percent
         }
         
-        piranhasStyles()
+        connect4Styles()
+    }
+    
+    fun connect4Styles() {
+        background {
+            opacity = 0.7
+            backgroundColor += c("#88DAF7")
+            backgroundImage += resources.url("/piranhas/water_b.png").toURI()
+            backgroundRepeat += BackgroundRepeat.REPEAT to BackgroundRepeat.REPEAT
+        }
+        
+        (1..3).forEach { size ->
+            Team.entries.forEach { team ->
+                ".${team}_${size}" {
+                    image = resources.url("/piranhas/${team.color}_${(96 + size).toChar()}.png")
+                        .toURI()
+                }
+            }
+        }
+        
+        ".squid" { image = resources.url("/piranhas/squid.png").toURI() }
+        ".grid" {
+            backgroundImage += resources.url("/piranhas/grid-crop.png").toURI()
+            backgroundSize += BackgroundSize(1.0, 1.0, true, true, false, false)
+        }
     }
     
     fun piranhasStyles() {
diff --git a/src/main/resources/META-INF/services/sc.gui.view.GameBoard b/src/main/resources/META-INF/services/sc.gui.view.GameBoard
index aaec2a4..bc28cf4 100644
--- a/src/main/resources/META-INF/services/sc.gui.view.GameBoard
+++ b/src/main/resources/META-INF/services/sc.gui.view.GameBoard
@@ -1 +1 @@
-sc.gui.view.game.PiranhasBoard
+sc.gui.view.game.Connect4Board

From c9b9819dfccb288981dca252b69dc2c9ddef1b9d Mon Sep 17 00:00:00 2001
From: Jonas <jonas@sturmente.de>
Date: Wed, 27 May 2026 22:19:37 +0200
Subject: [PATCH 10/19] resources(vier-gewinnt): Add simple graphics

The visualization does not work at the moment
---
 src/main/kotlin/sc/gui/AppStyle.kt            |   9 +-
 .../kotlin/sc/gui/view/game/Connect4Board.kt  | 162 ++++++++++++++++++
 src/main/resources/connect4/board.png         | Bin 0 -> 24201 bytes
 src/main/resources/connect4/cell-debug.png    | Bin 0 -> 155 bytes
 src/main/resources/connect4/cell.png          | Bin 0 -> 746 bytes
 src/main/resources/connect4/chip-gelb.png     | Bin 0 -> 1512 bytes
 src/main/resources/connect4/chip-rot.png      | Bin 0 -> 1499 bytes
 7 files changed, 168 insertions(+), 3 deletions(-)
 create mode 100644 src/main/kotlin/sc/gui/view/game/Connect4Board.kt
 create mode 100644 src/main/resources/connect4/board.png
 create mode 100644 src/main/resources/connect4/cell-debug.png
 create mode 100644 src/main/resources/connect4/cell.png
 create mode 100644 src/main/resources/connect4/chip-gelb.png
 create mode 100644 src/main/resources/connect4/chip-rot.png

diff --git a/src/main/kotlin/sc/gui/AppStyle.kt b/src/main/kotlin/sc/gui/AppStyle.kt
index 5834724..3a141de 100644
--- a/src/main/kotlin/sc/gui/AppStyle.kt
+++ b/src/main/kotlin/sc/gui/AppStyle.kt
@@ -11,6 +11,7 @@ import javafx.scene.text.FontWeight
 import javafx.scene.text.TextAlignment
 import sc.api.plugins.Team
 import sc.gui.model.AppModel
+import sc.plugin2098.util.Connect4Constants
 import tornadofx.*
 
 class AppStyle: Stylesheet() {
@@ -177,10 +178,12 @@ class AppStyle: Stylesheet() {
             }
         }
         
-        ".squid" { image = resources.url("/piranhas/squid.png").toURI() }
+        ".chip-r" { image = resources.url("/connect4/chip-rot.png").toURI() }
+        ".chip-y" { image = resources.url("/connect4/chip-gelb.png").toURI() }
+        ".cell" { image = resources.url("/connect4/cell-debug.png").toURI() }
         ".grid" {
-            backgroundImage += resources.url("/piranhas/grid-crop.png").toURI()
-            backgroundSize += BackgroundSize(1.0, 1.0, true, true, false, false)
+            backgroundImage += resources.url("/connect4/board.png").toURI()
+            backgroundSize += BackgroundSize(1.0, 0.1, true, true, false, false)
         }
     }
     
diff --git a/src/main/kotlin/sc/gui/view/game/Connect4Board.kt b/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
new file mode 100644
index 0000000..a5df6a6
--- /dev/null
+++ b/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
@@ -0,0 +1,162 @@
+package sc.gui.view.game
+
+import javafx.application.Platform
+import javafx.geometry.Insets
+import javafx.geometry.Point2D
+import javafx.geometry.Pos
+import javafx.scene.Node
+import javafx.scene.effect.ColorAdjust
+import javafx.scene.effect.Glow
+import javafx.scene.input.KeyEvent
+import javafx.scene.layout.GridPane
+import sc.api.plugins.Coordinates
+import sc.gui.util.listenImmediately
+import sc.gui.view.GameBoard
+import sc.gui.view.PieceImage
+import sc.gui.view.transitionDuration
+import sc.plugin2098.FieldState
+import sc.plugin2098.GameState
+import sc.plugin2098.util.GameRuleLogic
+import sc.plugin2098.util.Connect4Constants
+import tornadofx.*
+
+class Connect4Board: GameBoard<GameState>() {
+    
+    private val gridSize
+        get() = squareSize.div(Connect4Constants.BOARD_WIDTH) // "Length of the smaller side of the window."
+    
+    val grid: GridPane = GridPane().addClass("grid").apply {
+        squareSize.listenImmediately { size ->
+            padding = Insets(
+                size.toDouble() / 80,
+                size.toDouble() / 80,
+                size.toDouble() / 300,
+                size.toDouble() / 200,
+            )
+        }
+    }
+    
+    override val root = hbox {
+        this.alignment = Pos.CENTER
+        vbox {
+            this.alignment = Pos.CENTER
+            add(grid)
+        }
+    }
+    
+    var selected: Node? = null
+    val hovers = ArrayList<Node>()
+    
+    fun clearHovers() {
+        logger.trace { "Clearing hovers: $hovers" }
+        grid.children.removeAll(hovers)
+        hovers.clear()
+    }
+    
+    fun addToGrid(child: Node, coordinates: Coordinates) {
+        grid.add(child, coordinates.x, Connect4Constants.BOARD_WIDTH - 1 - coordinates.y)
+    }
+    
+    override fun onNewState(oldState: GameState?, state: GameState?) {
+        selected = grid
+        logger.debug { "New State: $state" }
+        grid.children.clear()
+        hovers.clear()
+        selected = null
+
+        // this ensures proper sizing of the board
+        (0 until Connect4Constants.BOARD_WIDTH).forEach { y ->
+  
+            grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.5 }, y, 0)
+        }
+        
+        (0 until Connect4Constants.BOARD_HEIGHT).forEach { y ->
+            grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.5 }, 0, y)
+
+        }
+//
+//        state?.let { state ->
+//            val move = state.lastMove?.let { move ->
+//                if(oldState?.turn?.minus(state.turn) == -1) {
+//                    move.from to GameRuleLogic.targetCoordinates(oldState.board, move)
+//                } else {
+//                    null
+//                }
+//            }
+//            state.board.forEach { (pos: Coordinates, field: FieldState) ->
+//                val piece = PieceImage(
+//                    gridSize,
+//                    field.team?.let { team -> "${team}_${field.size}" } ?: field.name.lowercase())
+//
+//                addToGrid(piece, pos)
+//                if(pos == move?.second) {
+//                    val offset = move.first - move.second
+//                    logger.debug { "Animating piece $piece (${piece.translateX}|${piece.translateY}) along $move from $offset" }
+//                    piece.effect = Glow(0.2)
+//                    piece.translateX = offset.dx * gridSize.value
+//                    piece.translateY = - offset.dy * gridSize.value
+//                    piece.move(transitionDuration, Point2D.ZERO)
+//                }
+//
+//                if(field.team == null)
+//                    return@forEach
+//                piece.hoverProperty().addListener { _, _, hover ->
+//                    if(selected == null) {
+//                        if(hover) {
+//                            Platform.runLater {
+//                                addHovers(state, pos, field)
+//                            }
+//                        } else {
+//                            if(field.team != state.currentTeam || !awaitingHumanMove.value)
+//                                clearHovers()
+//                        }
+//                    }
+//                }
+//                piece.onLeftClick {
+//                    if(field.team == state.currentTeam && awaitingHumanMove.value) {
+//                        logger.debug { "Clicked own fish on $pos" }
+//                        selected?.effect = null
+//                        if(selected == piece) {
+//                            clearHovers()
+//                            selected = null
+//                            return@onLeftClick
+//                        }
+//                        selected = piece
+//                        piece.effect = Glow(0.6)
+//                        addHovers(state, pos, field)
+//                    }
+//                }
+//            }
+//        }
+    }
+    
+    fun addHovers(state: GameState, pos: Coordinates, field: FieldState) {
+//        logger.trace { "Clearing hovers and adding for $pos in turn ${state.turn}" }
+//        clearHovers()
+//
+//        val board = state.board
+//        GameRuleLogic.possibleMovesFor(board, pos).forEach { move ->
+//            val target = GameRuleLogic.targetCoordinates(board, move)
+//            val hover = PieceImage(gridSize, "${field.team}_${field.size}")
+//
+//            val current = field.team == state.currentTeam
+//            hover.effect = ColorAdjust().apply {
+//                saturation = if(current && awaitingHumanMove.value) -0.4 else -0.9
+//            }
+//            if(current)
+//                hover.onLeftClick { sendHumanMove(move) }
+//
+//            hovers.add(hover)
+//            addToGrid(hover, target)
+//        }
+    }
+    
+    override fun handleKeyPress(state: GameState, keyEvent: KeyEvent): Boolean {
+        return false
+    }
+    
+    override fun renderHumanControls(state: GameState) {
+        // not needed for piranhas, handled abovene
+    }
+    
+}
\ No newline at end of file
diff --git a/src/main/resources/connect4/board.png b/src/main/resources/connect4/board.png
new file mode 100644
index 0000000000000000000000000000000000000000..58247b584d47b82498f1b19aa2144f57bca2bc0a
GIT binary patch
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diff --git a/src/main/resources/connect4/cell-debug.png b/src/main/resources/connect4/cell-debug.png
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diff --git a/src/main/resources/connect4/cell.png b/src/main/resources/connect4/cell.png
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diff --git a/src/main/resources/connect4/chip-rot.png b/src/main/resources/connect4/chip-rot.png
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From 9364e2cad5cad699e511f5f4b6587288822877ba Mon Sep 17 00:00:00 2001
From: Jonas <jonas@sturmente.de>
Date: Thu, 4 Jun 2026 00:24:55 +0200
Subject: [PATCH 11/19] feat: Display pieces and display possible moves

---
 src/main/kotlin/sc/gui/AppStyle.kt            |   6 +-
 src/main/kotlin/sc/gui/view/PieceImage.kt     |   1 -
 .../kotlin/sc/gui/view/game/Connect4Board.kt  | 104 ++++++------------
 3 files changed, 37 insertions(+), 74 deletions(-)

diff --git a/src/main/kotlin/sc/gui/AppStyle.kt b/src/main/kotlin/sc/gui/AppStyle.kt
index 3a141de..109fef1 100644
--- a/src/main/kotlin/sc/gui/AppStyle.kt
+++ b/src/main/kotlin/sc/gui/AppStyle.kt
@@ -178,12 +178,12 @@ class AppStyle: Stylesheet() {
             }
         }
         
-        ".chip-r" { image = resources.url("/connect4/chip-rot.png").toURI() }
-        ".chip-y" { image = resources.url("/connect4/chip-gelb.png").toURI() }
+        ".one-chip" { image = resources.url("/connect4/chip-rot.png").toURI() }
+        ".two-chip" { image = resources.url("/connect4/chip-gelb.png").toURI() }
         ".cell" { image = resources.url("/connect4/cell-debug.png").toURI() }
         ".grid" {
             backgroundImage += resources.url("/connect4/board.png").toURI()
-            backgroundSize += BackgroundSize(1.0, 0.1, true, true, false, false)
+            backgroundSize += BackgroundSize(1.0, 1.0, true, true, false, false)
         }
     }
     
diff --git a/src/main/kotlin/sc/gui/view/PieceImage.kt b/src/main/kotlin/sc/gui/view/PieceImage.kt
index 3cc18a3..37720f0 100644
--- a/src/main/kotlin/sc/gui/view/PieceImage.kt
+++ b/src/main/kotlin/sc/gui/view/PieceImage.kt
@@ -84,7 +84,6 @@ class PieceImage(private val sizeProperty: ObservableDoubleValue, val content: S
     }
     
     fun addChild(graphic: String, index: Int? = null) {
-        //logger.trace { "$this: Adding $graphic" }
         children.add(index ?: children.size, ResizableImageView(sizeProperty).apply {
             addClass(graphic)
             if(graphic == "penguin")
diff --git a/src/main/kotlin/sc/gui/view/game/Connect4Board.kt b/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
index a5df6a6..760c4e5 100644
--- a/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
+++ b/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
@@ -66,16 +66,18 @@ class Connect4Board: GameBoard<GameState>() {
 
         // this ensures proper sizing of the board
         (0 until Connect4Constants.BOARD_WIDTH).forEach { y ->
-  
-            grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.5 }, y, 0)
+            //grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.5 }, y, 0)
+            grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.0 }, y, 0)
         }
         
         (0 until Connect4Constants.BOARD_HEIGHT).forEach { y ->
-            grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.5 }, 0, y)
-
+            //grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.5 }, 0, y)
+            grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.0 }, 0, y)
         }
-//
-//        state?.let { state ->
+        //grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.5 }, Connect4Constants.BOARD_WIDTH - 1, Connect4Constants.BOARD_HEIGHT - 1)
+
+        
+        state?.let { state ->
 //            val move = state.lastMove?.let { move ->
 //                if(oldState?.turn?.minus(state.turn) == -1) {
 //                    move.from to GameRuleLogic.targetCoordinates(oldState.board, move)
@@ -83,72 +85,23 @@ class Connect4Board: GameBoard<GameState>() {
 //                    null
 //                }
 //            }
-//            state.board.forEach { (pos: Coordinates, field: FieldState) ->
+            state.board.forEach { (pos: Coordinates, field: FieldState) ->
 //                val piece = PieceImage(
 //                    gridSize,
 //                    field.team?.let { team -> "${team}_${field.size}" } ?: field.name.lowercase())
-//
-//                addToGrid(piece, pos)
-//                if(pos == move?.second) {
-//                    val offset = move.first - move.second
-//                    logger.debug { "Animating piece $piece (${piece.translateX}|${piece.translateY}) along $move from $offset" }
-//                    piece.effect = Glow(0.2)
-//                    piece.translateX = offset.dx * gridSize.value
-//                    piece.translateY = - offset.dy * gridSize.value
-//                    piece.move(transitionDuration, Point2D.ZERO)
-//                }
-//
-//                if(field.team == null)
-//                    return@forEach
-//                piece.hoverProperty().addListener { _, _, hover ->
-//                    if(selected == null) {
-//                        if(hover) {
-//                            Platform.runLater {
-//                                addHovers(state, pos, field)
-//                            }
-//                        } else {
-//                            if(field.team != state.currentTeam || !awaitingHumanMove.value)
-//                                clearHovers()
-//                        }
-//                    }
-//                }
-//                piece.onLeftClick {
-//                    if(field.team == state.currentTeam && awaitingHumanMove.value) {
-//                        logger.debug { "Clicked own fish on $pos" }
-//                        selected?.effect = null
-//                        if(selected == piece) {
-//                            clearHovers()
-//                            selected = null
-//                            return@onLeftClick
-//                        }
-//                        selected = piece
-//                        piece.effect = Glow(0.6)
-//                        addHovers(state, pos, field)
-//                    }
-//                }
-//            }
-//        }
-    }
-    
-    fun addHovers(state: GameState, pos: Coordinates, field: FieldState) {
-//        logger.trace { "Clearing hovers and adding for $pos in turn ${state.turn}" }
-//        clearHovers()
-//
-//        val board = state.board
-//        GameRuleLogic.possibleMovesFor(board, pos).forEach { move ->
-//            val target = GameRuleLogic.targetCoordinates(board, move)
-//            val hover = PieceImage(gridSize, "${field.team}_${field.size}")
-//
-//            val current = field.team == state.currentTeam
-//            hover.effect = ColorAdjust().apply {
-//                saturation = if(current && awaitingHumanMove.value) -0.4 else -0.9
-//            }
-//            if(current)
-//                hover.onLeftClick { sendHumanMove(move) }
-//
-//            hovers.add(hover)
-//            addToGrid(hover, target)
-//        }
+                
+                println(field.team ?: field.name)
+                
+                if(field.team == null) {
+                    return@forEach
+                }
+                
+                println("${field.team!!.name}_chip".lowercase())
+                
+                val piece = PieceImage(gridSize, field.team.let { team -> "${team}-chip".lowercase() })
+                addToGrid(piece, pos)
+            }
+        }
     }
     
     override fun handleKeyPress(state: GameState, keyEvent: KeyEvent): Boolean {
@@ -156,7 +109,18 @@ class Connect4Board: GameBoard<GameState>() {
     }
     
     override fun renderHumanControls(state: GameState) {
-        // not needed for piranhas, handled abovene
+        state.getSensibleMoves().forEach { move ->
+            
+            val piece = PieceImage(gridSize, "${state.currentTeam}-chip".lowercase())
+            
+            piece.opacity = 0.7
+            
+            piece.onLeftClick {
+                sendHumanMove(move)
+            }
+            
+            addToGrid(piece, move.position)
+        }
     }
     
 }
\ No newline at end of file

From 83c1daa1cf6f0f0200c940f330584278872ee730 Mon Sep 17 00:00:00 2001
From: Jonas <jonas@sturmente.de>
Date: Thu, 4 Jun 2026 00:31:18 +0200
Subject: [PATCH 12/19] feat: Keyboard inputs

---
 .../kotlin/sc/gui/view/game/Connect4Board.kt  | 27 +++++++++----------
 1 file changed, 12 insertions(+), 15 deletions(-)

diff --git a/src/main/kotlin/sc/gui/view/game/Connect4Board.kt b/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
index 760c4e5..64122f7 100644
--- a/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
+++ b/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
@@ -78,26 +78,11 @@ class Connect4Board: GameBoard<GameState>() {
 
         
         state?.let { state ->
-//            val move = state.lastMove?.let { move ->
-//                if(oldState?.turn?.minus(state.turn) == -1) {
-//                    move.from to GameRuleLogic.targetCoordinates(oldState.board, move)
-//                } else {
-//                    null
-//                }
-//            }
             state.board.forEach { (pos: Coordinates, field: FieldState) ->
-//                val piece = PieceImage(
-//                    gridSize,
-//                    field.team?.let { team -> "${team}_${field.size}" } ?: field.name.lowercase())
-                
-                println(field.team ?: field.name)
-                
                 if(field.team == null) {
                     return@forEach
                 }
                 
-                println("${field.team!!.name}_chip".lowercase())
-                
                 val piece = PieceImage(gridSize, field.team.let { team -> "${team}-chip".lowercase() })
                 addToGrid(piece, pos)
             }
@@ -105,6 +90,18 @@ class Connect4Board: GameBoard<GameState>() {
     }
     
     override fun handleKeyPress(state: GameState, keyEvent: KeyEvent): Boolean {
+        println(keyEvent.text)
+        
+        var x = keyEvent.text.toIntOrNull() ?: return false
+        x -= 1
+        
+        state.getSensibleMoves().forEach { move ->
+            if(move.position.x == x) {
+                sendHumanMove(move)
+                return true
+            }
+        }
+        
         return false
     }
     

From 654cd9510eb38c0e565a3a7b07f59541879d8836 Mon Sep 17 00:00:00 2001
From: Jonas <jonas@sturmente.de>
Date: Thu, 4 Jun 2026 00:32:24 +0200
Subject: [PATCH 13/19] chore: Remove println

---
 src/main/kotlin/sc/gui/view/game/Connect4Board.kt | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/main/kotlin/sc/gui/view/game/Connect4Board.kt b/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
index 64122f7..6c7faca 100644
--- a/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
+++ b/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
@@ -90,7 +90,6 @@ class Connect4Board: GameBoard<GameState>() {
     }
     
     override fun handleKeyPress(state: GameState, keyEvent: KeyEvent): Boolean {
-        println(keyEvent.text)
         
         var x = keyEvent.text.toIntOrNull() ?: return false
         x -= 1

From 1dac3274783ae80fb39845732d83074dc1519b9c Mon Sep 17 00:00:00 2001
From: NichtNil5 <nilsmarten2005@gmail.com>
Date: Thu, 4 Jun 2026 23:23:02 +0200
Subject: [PATCH 14/19] fix(vier-gewinnt): Fixed wrong Constant in addToGrid
 Changed addToGrid to use BOARD_HEIGHT instead of BOARD_WIDTH to calculate the
 rowIndex.

---
 src/main/kotlin/sc/gui/view/game/Connect4Board.kt | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/main/kotlin/sc/gui/view/game/Connect4Board.kt b/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
index 6c7faca..e049916 100644
--- a/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
+++ b/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
@@ -1,6 +1,7 @@
 package sc.gui.view.game
 
 import javafx.application.Platform
+import javafx.beans.binding.DoubleBinding
 import javafx.geometry.Insets
 import javafx.geometry.Point2D
 import javafx.geometry.Pos
@@ -37,7 +38,7 @@ class Connect4Board: GameBoard<GameState>() {
     }
     
     override val root = hbox {
-        this.alignment = Pos.CENTER
+        this.alignment = Pos.BOTTOM_CENTER
         vbox {
             this.alignment = Pos.CENTER
             add(grid)
@@ -54,7 +55,7 @@ class Connect4Board: GameBoard<GameState>() {
     }
     
     fun addToGrid(child: Node, coordinates: Coordinates) {
-        grid.add(child, coordinates.x, Connect4Constants.BOARD_WIDTH - 1 - coordinates.y)
+        grid.add(child, coordinates.x, Connect4Constants.BOARD_HEIGHT - 1 - coordinates.y)
     }
     
     override fun onNewState(oldState: GameState?, state: GameState?) {
@@ -63,7 +64,7 @@ class Connect4Board: GameBoard<GameState>() {
         grid.children.clear()
         hovers.clear()
         selected = null
-
+        
         // this ensures proper sizing of the board
         (0 until Connect4Constants.BOARD_WIDTH).forEach { y ->
             //grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.5 }, y, 0)
@@ -82,7 +83,6 @@ class Connect4Board: GameBoard<GameState>() {
                 if(field.team == null) {
                     return@forEach
                 }
-                
                 val piece = PieceImage(gridSize, field.team.let { team -> "${team}-chip".lowercase() })
                 addToGrid(piece, pos)
             }

From 6d2b2c97690a05152be8c594c53026f009762da7 Mon Sep 17 00:00:00 2001
From: Jonas <jonas@sturmente.de>
Date: Thu, 4 Jun 2026 23:30:31 +0200
Subject: [PATCH 15/19] refactor: Update chip images to fit right size

---
 .../kotlin/sc/gui/view/game/Connect4Board.kt   |   6 ------
 src/main/resources/connect4/chip-gelb.png      | Bin 1512 -> 747 bytes
 src/main/resources/connect4/chip-rot.png       | Bin 1499 -> 747 bytes
 3 files changed, 6 deletions(-)

diff --git a/src/main/kotlin/sc/gui/view/game/Connect4Board.kt b/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
index 6c7faca..2011972 100644
--- a/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
+++ b/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
@@ -47,12 +47,6 @@ class Connect4Board: GameBoard<GameState>() {
     var selected: Node? = null
     val hovers = ArrayList<Node>()
     
-    fun clearHovers() {
-        logger.trace { "Clearing hovers: $hovers" }
-        grid.children.removeAll(hovers)
-        hovers.clear()
-    }
-    
     fun addToGrid(child: Node, coordinates: Coordinates) {
         grid.add(child, coordinates.x, Connect4Constants.BOARD_WIDTH - 1 - coordinates.y)
     }
diff --git a/src/main/resources/connect4/chip-gelb.png b/src/main/resources/connect4/chip-gelb.png
index b54cee4b8cf3af1e2ba2a7798237ed9f95eb60ba..59421bc896fbf31669b1e316912451e026f5248d 100644
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diff --git a/src/main/resources/connect4/chip-rot.png b/src/main/resources/connect4/chip-rot.png
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From d96d438a05c7e7dda901a9a530b2c2ba41d1edf9 Mon Sep 17 00:00:00 2001
From: Jonas <jonas@sturmente.de>
Date: Fri, 5 Jun 2026 16:56:09 +0200
Subject: [PATCH 16/19] fix(vier-gewinnt): Unalignement of chips

Fixed by removing margins
---
 src/main/kotlin/sc/gui/view/game/Connect4Board.kt | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/src/main/kotlin/sc/gui/view/game/Connect4Board.kt b/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
index a2b2bf8..9c0ac53 100644
--- a/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
+++ b/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
@@ -26,16 +26,7 @@ class Connect4Board: GameBoard<GameState>() {
     private val gridSize
         get() = squareSize.div(Connect4Constants.BOARD_WIDTH) // "Length of the smaller side of the window."
     
-    val grid: GridPane = GridPane().addClass("grid").apply {
-        squareSize.listenImmediately { size ->
-            padding = Insets(
-                size.toDouble() / 80,
-                size.toDouble() / 80,
-                size.toDouble() / 300,
-                size.toDouble() / 200,
-            )
-        }
-    }
+    val grid: GridPane = GridPane().addClass("grid")
     
     override val root = hbox {
         this.alignment = Pos.BOTTOM_CENTER
@@ -62,12 +53,12 @@ class Connect4Board: GameBoard<GameState>() {
         // this ensures proper sizing of the board
         (0 until Connect4Constants.BOARD_WIDTH).forEach { y ->
             //grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.5 }, y, 0)
-            grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.0 }, y, 0)
+            grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.5 }, y, 0)
         }
         
         (0 until Connect4Constants.BOARD_HEIGHT).forEach { y ->
             //grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.5 }, 0, y)
-            grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.0 }, 0, y)
+            grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.5 }, 0, y)
         }
         //grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.5 }, Connect4Constants.BOARD_WIDTH - 1, Connect4Constants.BOARD_HEIGHT - 1)
 

From 597967ddac26837ae5e9208dc25649defbcb1482 Mon Sep 17 00:00:00 2001
From: Jonas <jonas@sturmente.de>
Date: Fri, 5 Jun 2026 17:00:12 +0200
Subject: [PATCH 17/19] refactor(vier-gewinnt):

---
 .../kotlin/sc/gui/view/game/Connect4Board.kt   | 18 ++----------------
 1 file changed, 2 insertions(+), 16 deletions(-)

diff --git a/src/main/kotlin/sc/gui/view/game/Connect4Board.kt b/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
index 9c0ac53..2f8ae13 100644
--- a/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
+++ b/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
@@ -1,23 +1,14 @@
 package sc.gui.view.game
 
-import javafx.application.Platform
-import javafx.beans.binding.DoubleBinding
-import javafx.geometry.Insets
-import javafx.geometry.Point2D
 import javafx.geometry.Pos
 import javafx.scene.Node
-import javafx.scene.effect.ColorAdjust
-import javafx.scene.effect.Glow
 import javafx.scene.input.KeyEvent
 import javafx.scene.layout.GridPane
 import sc.api.plugins.Coordinates
-import sc.gui.util.listenImmediately
 import sc.gui.view.GameBoard
 import sc.gui.view.PieceImage
-import sc.gui.view.transitionDuration
 import sc.plugin2098.FieldState
 import sc.plugin2098.GameState
-import sc.plugin2098.util.GameRuleLogic
 import sc.plugin2098.util.Connect4Constants
 import tornadofx.*
 
@@ -52,16 +43,12 @@ class Connect4Board: GameBoard<GameState>() {
         
         // this ensures proper sizing of the board
         (0 until Connect4Constants.BOARD_WIDTH).forEach { y ->
-            //grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.5 }, y, 0)
-            grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.5 }, y, 0)
+            grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.0 }, y, 0)
         }
         
         (0 until Connect4Constants.BOARD_HEIGHT).forEach { y ->
-            //grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.5 }, 0, y)
-            grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.5 }, 0, y)
+            grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.0 }, 0, y)
         }
-        //grid.add(PieceImage(gridSize, "cell").apply { opacity = 0.5 }, Connect4Constants.BOARD_WIDTH - 1, Connect4Constants.BOARD_HEIGHT - 1)
-
         
         state?.let { state ->
             state.board.forEach { (pos: Coordinates, field: FieldState) ->
@@ -103,5 +90,4 @@ class Connect4Board: GameBoard<GameState>() {
             addToGrid(piece, move.position)
         }
     }
-    
 }
\ No newline at end of file

From 2b9ca622916804b8fde7b293b2e12b714e8c0b44 Mon Sep 17 00:00:00 2001
From: Jonas <jonas@sturmente.de>
Date: Fri, 5 Jun 2026 19:31:18 +0200
Subject: [PATCH 18/19] feat(vier-gewinnt): Improve visibility of possible
 moves

---
 src/main/kotlin/sc/gui/view/game/Connect4Board.kt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/main/kotlin/sc/gui/view/game/Connect4Board.kt b/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
index 2f8ae13..0eccfaa 100644
--- a/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
+++ b/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
@@ -2,6 +2,7 @@ package sc.gui.view.game
 
 import javafx.geometry.Pos
 import javafx.scene.Node
+import javafx.scene.effect.Glow
 import javafx.scene.input.KeyEvent
 import javafx.scene.layout.GridPane
 import sc.api.plugins.Coordinates
@@ -81,7 +82,8 @@ class Connect4Board: GameBoard<GameState>() {
             
             val piece = PieceImage(gridSize, "${state.currentTeam}-chip".lowercase())
             
-            piece.opacity = 0.7
+            piece.opacity = 0.5
+            //piece.effect = Glow(1.0)
             
             piece.onLeftClick {
                 sendHumanMove(move)

From e07b7b5a2ccf0a557c8b8d419d3ec8b6b76e72f8 Mon Sep 17 00:00:00 2001
From: Jonas <jonas@sturmente.de>
Date: Sat, 6 Jun 2026 00:06:14 +0200
Subject: [PATCH 19/19] feat(vier-gewinnt): Mark winning pieces

---
 ...otlin-compiler-13424373081474350713.salive |   0
 backend                                       |   2 +-
 src/main/kotlin/sc/gui/AppStyle.kt            |   2 ++
 .../kotlin/sc/gui/view/game/Connect4Board.kt  |  21 +++++++++++++++++-
 .../resources/connect4/chip-gelb-winning.png  | Bin 0 -> 873 bytes
 .../resources/connect4/chip-rot-winning.png   | Bin 0 -> 873 bytes
 6 files changed, 23 insertions(+), 2 deletions(-)
 create mode 100644 .kotlin/sessions/kotlin-compiler-13424373081474350713.salive
 create mode 100644 src/main/resources/connect4/chip-gelb-winning.png
 create mode 100644 src/main/resources/connect4/chip-rot-winning.png

diff --git a/.kotlin/sessions/kotlin-compiler-13424373081474350713.salive b/.kotlin/sessions/kotlin-compiler-13424373081474350713.salive
new file mode 100644
index 0000000..e69de29
diff --git a/backend b/backend
index 5f739a2..7b67e3a 160000
--- a/backend
+++ b/backend
@@ -1 +1 @@
-Subproject commit 5f739a2425252f94f5df6921f06c4ae4dab93f51
+Subproject commit 7b67e3a100c55ad7ea550217f242d52f805994c6
diff --git a/src/main/kotlin/sc/gui/AppStyle.kt b/src/main/kotlin/sc/gui/AppStyle.kt
index 109fef1..612aa8c 100644
--- a/src/main/kotlin/sc/gui/AppStyle.kt
+++ b/src/main/kotlin/sc/gui/AppStyle.kt
@@ -180,6 +180,8 @@ class AppStyle: Stylesheet() {
         
         ".one-chip" { image = resources.url("/connect4/chip-rot.png").toURI() }
         ".two-chip" { image = resources.url("/connect4/chip-gelb.png").toURI() }
+        ".one-chip-winning" { image = resources.url("/connect4/chip-rot-winning.png").toURI() }
+        ".two-chip-winning" { image = resources.url("/connect4/chip-gelb-winning.png").toURI() }
         ".cell" { image = resources.url("/connect4/cell-debug.png").toURI() }
         ".grid" {
             backgroundImage += resources.url("/connect4/board.png").toURI()
diff --git a/src/main/kotlin/sc/gui/view/game/Connect4Board.kt b/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
index 0eccfaa..dfb1b8f 100644
--- a/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
+++ b/src/main/kotlin/sc/gui/view/game/Connect4Board.kt
@@ -11,6 +11,7 @@ import sc.gui.view.PieceImage
 import sc.plugin2098.FieldState
 import sc.plugin2098.GameState
 import sc.plugin2098.util.Connect4Constants
+import sc.plugin2098.util.GameRuleLogic
 import tornadofx.*
 
 class Connect4Board: GameBoard<GameState>() {
@@ -52,11 +53,29 @@ class Connect4Board: GameBoard<GameState>() {
         }
         
         state?.let { state ->
+         
+            var winningCoords: List<Coordinates> = ArrayList()
+            
+            state.isOver?.let { isOver ->
+                if(isOver && state.lastMove != null) {
+                    winningCoords = GameRuleLogic.get4Connected(state.board, state.otherTeam, state.lastMove!!.position)
+                    println(winningCoords.size)
+                }
+            }
+         
             state.board.forEach { (pos: Coordinates, field: FieldState) ->
                 if(field.team == null) {
                     return@forEach
                 }
-                val piece = PieceImage(gridSize, field.team.let { team -> "${team}-chip".lowercase() })
+                val piece: PieceImage
+                
+                if(winningCoords.contains(pos)) {
+                    piece = PieceImage(gridSize, field.team.let { team -> "${team}-chip-winning".lowercase() })
+                    piece.effect = Glow(1.0)
+                } else {
+                    piece = PieceImage(gridSize, field.team.let { team -> "${team}-chip".lowercase() })
+                }
+                
                 addToGrid(piece, pos)
             }
         }
diff --git a/src/main/resources/connect4/chip-gelb-winning.png b/src/main/resources/connect4/chip-gelb-winning.png
new file mode 100644
index 0000000000000000000000000000000000000000..3af3c44c7696e0b08cfd21fbbb8c07f3ce0c49ea
GIT binary patch
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diff --git a/src/main/resources/connect4/chip-rot-winning.png b/src/main/resources/connect4/chip-rot-winning.png
new file mode 100644
index 0000000000000000000000000000000000000000..13557771ba5767c722c37138ab8130381038d94e
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