feat: Implement threefold repetition detection and update game rules

modules/ui/CHANGELOG.md

@@ -79,3 +79,15 @@
 * NCS-21 Write Scripts to automate certain tasks ([#15](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/15)) ([8051871](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/80518719d536a087d339fe02530825dc07f8b388))
 * NCS-25 Add linters to keep quality up ([#27](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/27)) ([fd4e67d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/fd4e67d4f782a7e955822d90cb909d0a81676fb2))
 * NCS-29 JSON - Cherry Picked ([#28](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/28)) ([dbcafd2](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/dbcafd286993e0604a6fa286c5543581a149439e))
+##  (2026-04-16)
+
+### Features
+
+* NCS-10 Implement Pawn Promotion ([#12](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/12)) ([13bfc16](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/13bfc16cfe25db78ec607db523ca6d993c13430c))
+* NCS-13 Implement Threefold Repetition ([#31](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/31)) ([767d305](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/767d3051a76c266050b6335774d66e2db2273c16))
+* NCS-14 implemented insufficient moves rule ([#30](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/30)) ([b0399a4](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/b0399a4e489950083066c9538df9a84dcc7a4613))
+* NCS-16 Core Separation via Patterns ([#10](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/10)) ([1361dfc](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/1361dfc89553b146864fb8ff3526cf12cf3f293a))
+* NCS-17 Implement basic ScalaFX UI ([#14](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/14)) ([3ff8031](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/3ff80318b4f16c59733a46498581a5c27f048287))
+* NCS-21 Write Scripts to automate certain tasks ([#15](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/15)) ([8051871](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/80518719d536a087d339fe02530825dc07f8b388))
+* NCS-25 Add linters to keep quality up ([#27](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/27)) ([fd4e67d](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/fd4e67d4f782a7e955822d90cb909d0a81676fb2))
+* NCS-29 JSON - Cherry Picked ([#28](https://git.janis-eccarius.de/NowChess/NowChessSystems/issues/28)) ([dbcafd2](https://git.janis-eccarius.de/NowChess/NowChessSystems/commit/dbcafd286993e0604a6fa286c5543581a149439e))

modules/ui/build.gradle.kts

@@ -38,11 +38,6 @@ tasks.withType<ScalaCompile> {
     scalaCompileOptions.additionalParameters = listOf("-encoding", "UTF-8")
 }
 
-// Disable scalafix for UI module due to mutable state requirements
-tasks.matching { it.name.startsWith("scalafix") }.configureEach {
-    enabled = false
-}
-
 tasks.named<JavaExec>("run") {
     jvmArgs("-Dfile.encoding=UTF-8", "-Dstdout.encoding=UTF-8", "-Dstderr.encoding=UTF-8")
     standardInput = System.`in`

modules/ui/src/main/scala/de/nowchess/ui/terminal/TerminalUI.scala

@@ -1,7 +1,8 @@
 package de.nowchess.ui.terminal
 
+import java.util.concurrent.atomic.AtomicBoolean
 import scala.io.StdIn
-import de.nowchess.api.move.PromotionPiece
+import de.nowchess.api.game.DrawReason
 import de.nowchess.chess.engine.GameEngine
 import de.nowchess.chess.observer.*
 import de.nowchess.ui.utils.Renderer
@@ -10,8 +11,7 @@ import de.nowchess.ui.utils.Renderer
   * I/O and user interaction in the terminal.
   */
 class TerminalUI(engine: GameEngine) extends Observer:
-  private val running           = new AtomicBoolean(true)
-  private val awaitingPromotion = new AtomicBoolean(false)
+  private val running = new AtomicBoolean(true)
 
   /** Called by GameEngine whenever a game event occurs. */
   override def onGameEvent(event: GameEvent): Unit =
@@ -63,9 +63,6 @@ class TerminalUI(engine: GameEngine) extends Observer:
         print(Renderer.render(e.context.board))
         printPrompt(e.context.turn)
 
-      case _: PromotionRequiredEvent =>
-        println("Promote to: q=Queen, r=Rook, b=Bishop, n=Knight")
-        awaitingPromotion.set(true)
       case _: FiftyMoveRuleAvailableEvent =>
         println("50-move rule is now available — type 'draw' to claim.")
 
@@ -91,24 +88,14 @@ class TerminalUI(engine: GameEngine) extends Observer:
     while running.get() do
       val input = Option(StdIn.readLine()).getOrElse("quit").trim
       synchronized {
-        if awaitingPromotion.get() then
-          input.toLowerCase match
-            case "q" => awaitingPromotion.set(false); engine.completePromotion(PromotionPiece.Queen)
-            case "r" => awaitingPromotion.set(false); engine.completePromotion(PromotionPiece.Rook)
-            case "b" => awaitingPromotion.set(false); engine.completePromotion(PromotionPiece.Bishop)
-            case "n" => awaitingPromotion.set(false); engine.completePromotion(PromotionPiece.Knight)
-            case _ =>
-              println("Invalid choice. Enter q, r, b, or n.")
-              println("Promote to: q=Queen, r=Rook, b=Bishop, n=Knight")
-        else
-          input.toLowerCase match
-            case "quit" | "q" =>
-              running.set(false)
-              println("Game over. Goodbye!")
-            case "" =>
-              printPrompt(engine.turn)
-            case _ =>
-              engine.processUserInput(input)
+        input.toLowerCase match
+          case "quit" | "q" =>
+            running.set(false)
+            println("Game over. Goodbye!")
+          case "" =>
+            printPrompt(engine.turn)
+          case _ =>
+            engine.processUserInput(input)
       }
 
     // Unsubscribe when done

modules/ui/versions.env

@@ -1,3 +1,3 @@
 MAJOR=0
-MINOR=10
+MINOR=11
 PATCH=0