diff --git a/modules/bot/src/main/scala/de/nowchess/bot/Bot.scala b/modules/api/src/main/scala/de/nowchess/api/bot/Bot.scala
similarity index 85%
rename from modules/bot/src/main/scala/de/nowchess/bot/Bot.scala
rename to modules/api/src/main/scala/de/nowchess/api/bot/Bot.scala
index 4865ea1..f9cb965 100644
--- a/modules/bot/src/main/scala/de/nowchess/bot/Bot.scala
+++ b/modules/api/src/main/scala/de/nowchess/api/bot/Bot.scala
@@ -1,4 +1,4 @@
-package de.nowchess.bot
+package de.nowchess.api.bot
 
 import de.nowchess.api.game.GameContext
 import de.nowchess.api.move.Move
diff --git a/modules/api/src/main/scala/de/nowchess/api/game/Participant.scala b/modules/api/src/main/scala/de/nowchess/api/game/Participant.scala
new file mode 100644
index 0000000..d131884
--- /dev/null
+++ b/modules/api/src/main/scala/de/nowchess/api/game/Participant.scala
@@ -0,0 +1,9 @@
+package de.nowchess.api.game
+
+import de.nowchess.api.bot.Bot
+import de.nowchess.api.player.PlayerInfo
+
+sealed trait Participant
+final case class Human(playerInfo: PlayerInfo) extends Participant
+final case class BotParticipant(bot: Bot) extends Participant
+
diff --git a/modules/bot/src/main/scala/de/nowchess/bot/BotController.scala b/modules/bot/src/main/scala/de/nowchess/bot/BotController.scala
index 98a4de8..8b520d1 100644
--- a/modules/bot/src/main/scala/de/nowchess/bot/BotController.scala
+++ b/modules/bot/src/main/scala/de/nowchess/bot/BotController.scala
@@ -1,5 +1,6 @@
 package de.nowchess.bot
 
+import de.nowchess.api.bot.Bot
 import de.nowchess.bot.bots.ClassicalBot
 
 object BotController {
diff --git a/modules/bot/src/main/scala/de/nowchess/bot/bots/ClassicalBot.scala b/modules/bot/src/main/scala/de/nowchess/bot/bots/ClassicalBot.scala
index a91a497..0573110 100644
--- a/modules/bot/src/main/scala/de/nowchess/bot/bots/ClassicalBot.scala
+++ b/modules/bot/src/main/scala/de/nowchess/bot/bots/ClassicalBot.scala
@@ -1,11 +1,12 @@
 package de.nowchess.bot.bots
 
+import de.nowchess.api.bot.Bot
 import de.nowchess.api.game.GameContext
 import de.nowchess.api.move.Move
 import de.nowchess.bot.bots.classic.EvaluationClassic
 import de.nowchess.bot.logic.AlphaBetaSearch
 import de.nowchess.bot.util.PolyglotBook
-import de.nowchess.bot.{Bot, BotDifficulty, BotMoveRepetition}
+import de.nowchess.bot.{BotDifficulty, BotMoveRepetition}
 import de.nowchess.rules.RuleSet
 import de.nowchess.rules.sets.DefaultRules
 
diff --git a/modules/bot/src/main/scala/de/nowchess/bot/bots/HybridBot.scala b/modules/bot/src/main/scala/de/nowchess/bot/bots/HybridBot.scala
index 0161470..a4cc841 100644
--- a/modules/bot/src/main/scala/de/nowchess/bot/bots/HybridBot.scala
+++ b/modules/bot/src/main/scala/de/nowchess/bot/bots/HybridBot.scala
@@ -1,12 +1,13 @@
 package de.nowchess.bot.bots
 
+import de.nowchess.api.bot.Bot
 import de.nowchess.api.game.GameContext
 import de.nowchess.api.move.Move
 import de.nowchess.bot.bots.classic.EvaluationClassic
 import de.nowchess.bot.bots.nnue.EvaluationNNUE
 import de.nowchess.bot.logic.{AlphaBetaSearch, TranspositionTable}
 import de.nowchess.bot.util.PolyglotBook
-import de.nowchess.bot.{Bot, BotDifficulty, BotMoveRepetition, Config}
+import de.nowchess.bot.{BotDifficulty, BotMoveRepetition, Config}
 import de.nowchess.rules.RuleSet
 import de.nowchess.rules.sets.DefaultRules
 
diff --git a/modules/bot/src/main/scala/de/nowchess/bot/bots/NNUEBot.scala b/modules/bot/src/main/scala/de/nowchess/bot/bots/NNUEBot.scala
index 04cc85c..094989d 100644
--- a/modules/bot/src/main/scala/de/nowchess/bot/bots/NNUEBot.scala
+++ b/modules/bot/src/main/scala/de/nowchess/bot/bots/NNUEBot.scala
@@ -1,11 +1,12 @@
 package de.nowchess.bot.bots
 
+import de.nowchess.api.bot.Bot
 import de.nowchess.api.game.GameContext
 import de.nowchess.api.move.Move
 import de.nowchess.bot.bots.nnue.EvaluationNNUE
 import de.nowchess.bot.logic.AlphaBetaSearch
 import de.nowchess.bot.util.{PolyglotBook, ZobristHash}
-import de.nowchess.bot.{Bot, BotDifficulty, BotMoveRepetition}
+import de.nowchess.bot.{BotDifficulty, BotMoveRepetition}
 import de.nowchess.rules.RuleSet
 import de.nowchess.rules.sets.DefaultRules
 
diff --git a/modules/core/src/main/scala/de/nowchess/chess/engine/GameEngine.scala b/modules/core/src/main/scala/de/nowchess/chess/engine/GameEngine.scala
index c283b8c..f16bc90 100644
--- a/modules/core/src/main/scala/de/nowchess/chess/engine/GameEngine.scala
+++ b/modules/core/src/main/scala/de/nowchess/chess/engine/GameEngine.scala
@@ -2,13 +2,15 @@ package de.nowchess.chess.engine
 
 import de.nowchess.api.board.{Board, Color, Piece, PieceType, Square}
 import de.nowchess.api.move.{Move, MoveType, PromotionPiece}
-import de.nowchess.api.game.{DrawReason, GameContext, GameResult}
+import de.nowchess.api.game.{BotParticipant, DrawReason, GameContext, GameResult, Human, Participant}
+import de.nowchess.api.player.{PlayerId, PlayerInfo}
 import de.nowchess.chess.controller.Parser
 import de.nowchess.chess.observer.*
 import de.nowchess.chess.command.{CommandInvoker, MoveCommand, MoveResult}
 import de.nowchess.io.{GameContextExport, GameContextImport}
 import de.nowchess.rules.RuleSet
 import de.nowchess.rules.sets.DefaultRules
+
 import scala.concurrent.{ExecutionContext, Future}
 
 /** Pure game engine that manages game state and notifies observers of state changes. All rule queries delegate to the
@@ -17,7 +19,7 @@ import scala.concurrent.{ExecutionContext, Future}
 class GameEngine(
     val initialContext: GameContext = GameContext.initial,
     val ruleSet: RuleSet = DefaultRules,
-    val participants: Map[Color, Participant] = Map(Color.White -> Human, Color.Black -> Human),
+    val participants: Map[Color, Participant] = Map(Color.White -> Human(PlayerInfo(PlayerId("p1"), "Player 1")), Color.Black -> Human(PlayerInfo(PlayerId("p2"), "Player 2"))),
 ) extends Observable:
   // Ensure that initialBoard is set correctly for threefold repetition detection
   private val contextWithInitialBoard = if initialContext.moves.isEmpty && initialContext.board != initialContext.initialBoard then
diff --git a/modules/core/src/main/scala/de/nowchess/chess/engine/Participant.scala b/modules/core/src/main/scala/de/nowchess/chess/engine/Participant.scala
deleted file mode 100644
index 9b0b1ee..0000000
--- a/modules/core/src/main/scala/de/nowchess/chess/engine/Participant.scala
+++ /dev/null
@@ -1,8 +0,0 @@
-package de.nowchess.chess.engine
-
-import de.nowchess.bot.Bot
-
-sealed trait Participant
-case object Human extends Participant
-final case class BotParticipant(bot: Bot) extends Participant
-
diff --git a/modules/core/src/test/scala/de/nowchess/chess/engine/GameEngineWithBotTest.scala b/modules/core/src/test/scala/de/nowchess/chess/engine/GameEngineWithBotTest.scala
index 8699235..20d9376 100644
--- a/modules/core/src/test/scala/de/nowchess/chess/engine/GameEngineWithBotTest.scala
+++ b/modules/core/src/test/scala/de/nowchess/chess/engine/GameEngineWithBotTest.scala
@@ -1,13 +1,15 @@
 package de.nowchess.chess.engine
 
 import de.nowchess.api.board.Color
-import de.nowchess.api.game.GameContext
+import de.nowchess.api.game.{BotParticipant, GameContext, Human}
+import de.nowchess.api.player.{PlayerId, PlayerInfo}
 import de.nowchess.bot.bots.ClassicalBot
 import de.nowchess.bot.{BotController, BotDifficulty}
 import de.nowchess.chess.observer.*
 import de.nowchess.rules.sets.DefaultRules
 import org.scalatest.funsuite.AnyFunSuite
 import org.scalatest.matchers.should.Matchers
+
 import java.util.concurrent.atomic.{AtomicBoolean, AtomicInteger}
 
 class GameEngineWithBotTest extends AnyFunSuite with Matchers:
@@ -17,7 +19,7 @@ class GameEngineWithBotTest extends AnyFunSuite with Matchers:
     val engine = GameEngine(
       GameContext.initial,
       DefaultRules,
-      Map(Color.White -> Human, Color.Black -> BotParticipant(bot)),
+      Map(Color.White -> Human(PlayerInfo(PlayerId("p1"), "Player 1")), Color.Black -> BotParticipant(bot)),
     )
 
     // Collect events
@@ -66,7 +68,7 @@ class GameEngineWithBotTest extends AnyFunSuite with Matchers:
     val engine = GameEngine(
       GameContext.initial,
       DefaultRules,
-      Map(Color.White -> Human, Color.Black -> BotParticipant(hardBot)),
+      Map(Color.White -> Human(PlayerInfo(PlayerId("p1"), "Player 1")), Color.Black -> BotParticipant(hardBot)),
     )
     engine.turn should equal(Color.White)
 
@@ -91,7 +93,7 @@ class GameEngineWithBotTest extends AnyFunSuite with Matchers:
     val engine = GameEngine(
       GameContext.initial,
       DefaultRules,
-      Map(Color.White -> Human, Color.Black -> BotParticipant(bot)),
+      Map(Color.White -> Human(PlayerInfo(PlayerId("p1"), "Player 1")), Color.Black -> BotParticipant(bot)),
     )
 
     val moveCount = new AtomicInteger(0)
diff --git a/modules/ui/src/main/scala/de/nowchess/ui/Main.scala b/modules/ui/src/main/scala/de/nowchess/ui/Main.scala
index 810543e..f5a8efd 100644
--- a/modules/ui/src/main/scala/de/nowchess/ui/Main.scala
+++ b/modules/ui/src/main/scala/de/nowchess/ui/Main.scala
@@ -1,5 +1,7 @@
 package de.nowchess.ui
 
+import de.nowchess.api.game.{BotParticipant, Human}
+import de.nowchess.api.player.{PlayerId, PlayerInfo}
 import de.nowchess.bot.util.PolyglotBook
 import de.nowchess.bot.BotDifficulty
 import de.nowchess.ui.terminal.TerminalUI
@@ -15,10 +17,10 @@ object Main:
     // Create the core game engine (single source of truth)
     val engine = new de.nowchess.chess.engine.GameEngine(
       participants = Map(
-        de.nowchess.api.board.Color.White -> de.nowchess.chess.engine.BotParticipant(
+        de.nowchess.api.board.Color.White -> BotParticipant(
           de.nowchess.bot.bots.HybridBot(BotDifficulty.Easy, book = Some(book)),
         ),
-        de.nowchess.api.board.Color.Black -> de.nowchess.chess.engine.Human,
+        de.nowchess.api.board.Color.Black -> Human(PlayerInfo(PlayerId("p1"), "Player 1")),
       ),
     )