feat(chess): avatar vs avatar display on board and game list

Add ChessPlayerChip.kt with three shared composables:
- ChessPlayerChip: single player avatar + name with active border
- ChessPlayerVsHeader: mirrored White vs Black header above the board
- OverlappingAvatars: compact overlapping circular avatars for list cards

Wire avatars into:
- LiveChessGameScreen: vs header with active player green border
- DesktopChessGameLayout: vs header above the chess board
- Android & Desktop lobby cards: overlapping avatars in ActiveGameCard,
  ChallengeCard, and OutgoingChallengeCard avatar slots

Uses existing UserAvatar (coil3 AsyncImage + Robohash fallback) from
commons for KMP compatibility.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chess/ChessGameScreen.kt

@@ -295,12 +295,42 @@ fun ChessGameScreen(
             }
 
             else -> {
-                // Resolve opponent display name
+                // Resolve opponent display name and avatar
+                val opponentUser =
+                    remember(gameState.opponentPubkey) {
+                        accountViewModel.checkGetOrCreateUser(gameState.opponentPubkey)
+                    }
                 val opponentDisplayName =
                     remember(gameState.opponentPubkey) {
-                        accountViewModel.checkGetOrCreateUser(gameState.opponentPubkey)?.toBestDisplayName()
+                        opponentUser?.toBestDisplayName() ?: gameState.opponentPubkey.take(8)
-                            ?: gameState.opponentPubkey.take(8)
                     }
+                val opponentAvatarUrl =
+                    remember(gameState.opponentPubkey) {
+                        opponentUser?.profilePicture()
+                    }
+
+                // Resolve player display name and avatar
+                val playerUser =
+                    remember(gameState.playerPubkey) {
+                        accountViewModel.checkGetOrCreateUser(gameState.playerPubkey)
+                    }
+                val playerDisplayName =
+                    remember(gameState.playerPubkey) {
+                        playerUser?.toBestDisplayName() ?: gameState.playerPubkey.take(8)
+                    }
+                val playerAvatarUrl =
+                    remember(gameState.playerPubkey) {
+                        playerUser?.profilePicture()
+                    }
+
+                // Determine white/black pubkeys, names and avatars based on player color
+                val isPlayerWhite = gameState.playerColor == com.vitorpamplona.quartz.nip64Chess.Color.WHITE
+                val whitePubkey = if (isPlayerWhite) gameState.playerPubkey else gameState.opponentPubkey
+                val blackPubkey = if (isPlayerWhite) gameState.opponentPubkey else gameState.playerPubkey
+                val whiteDisplayName = if (isPlayerWhite) playerDisplayName else opponentDisplayName
+                val blackDisplayName = if (isPlayerWhite) opponentDisplayName else playerDisplayName
+                val whiteAvatarUrl = if (isPlayerWhite) playerAvatarUrl else opponentAvatarUrl
+                val blackAvatarUrl = if (isPlayerWhite) opponentAvatarUrl else playerAvatarUrl
 
                 // Determine spectator status:
                 // 1. If game was accepted locally, user is definitely NOT a spectator
@@ -320,6 +350,12 @@ fun ChessGameScreen(
                     onResign = { chessViewModel.resign(gameId) },
                     isSpectatorOverride = isSpectating,
                     onGameEndDismiss = { chessViewModel.dismissGame(gameId) },
+                    whiteName = whiteDisplayName,
+                    whiteHex = whitePubkey,
+                    whiteAvatarUrl = whiteAvatarUrl,
+                    blackName = blackDisplayName,
+                    blackHex = blackPubkey,
+                    blackAvatarUrl = blackAvatarUrl,
                 )
             }
         }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chess/ChessLobbyScreen.kt

@@ -69,6 +69,7 @@ import com.vitorpamplona.amethyst.commons.chess.ChessChallenge
 import com.vitorpamplona.amethyst.commons.chess.ChessSyncBanner
 import com.vitorpamplona.amethyst.commons.chess.NewChessGameDialog
 import com.vitorpamplona.amethyst.commons.chess.OutgoingChallengeCard
+import com.vitorpamplona.amethyst.commons.chess.OverlappingAvatars
 import com.vitorpamplona.amethyst.commons.chess.PublicGameCard
 import com.vitorpamplona.amethyst.commons.chess.SpectatingGameCard
 import com.vitorpamplona.amethyst.ui.feeds.RefresheableBox
@@ -359,15 +360,28 @@ fun ChessLobbyContent(
             }
 
             items(activeGames.entries.toList(), key = { "active-${it.key}" }) { (gameId, state) ->
-                val displayName =
+                val opponent =
                     remember(state.opponentPubkey) {
-                        accountViewModel.checkGetOrCreateUser(state.opponentPubkey)?.toBestDisplayName() ?: state.opponentPubkey.take(8)
+                        accountViewModel.checkGetOrCreateUser(state.opponentPubkey)
+                    }
+                val displayName = opponent?.toBestDisplayName() ?: state.opponentPubkey.take(8)
+                val playerUser =
+                    remember(state.playerPubkey) {
+                        accountViewModel.checkGetOrCreateUser(state.playerPubkey)
                     }
                 ActiveGameCard(
                     gameId = gameId,
                     opponentName = displayName,
                     isYourTurn = state.isPlayerTurn(),
                     onClick = { onSelectGame(gameId) },
+                    avatar = {
+                        OverlappingAvatars(
+                            avatar1Hex = state.playerPubkey,
+                            avatar2Hex = state.opponentPubkey,
+                            avatar1Url = playerUser?.profilePicture(),
+                            avatar2Url = opponent?.profilePicture(),
+                        )
+                    },
                 )
             }
         }
@@ -386,14 +400,32 @@ fun ChessLobbyContent(
             }
 
             items(outgoingChallenges, key = { "outgoing-${it.eventId}" }) { challenge ->
+                val opponentUser =
+                    remember(challenge.opponentPubkey) {
+                        challenge.opponentPubkey?.let { accountViewModel.checkGetOrCreateUser(it) }
+                    }
                 val opponentName =
-                    challenge.opponentPubkey?.let { pubkey ->
+                    opponentUser?.toBestDisplayName()
-                        accountViewModel.checkGetOrCreateUser(pubkey)?.toBestDisplayName() ?: pubkey.take(8)
+                        ?: challenge.opponentPubkey?.take(8)
+                val currentUser =
+                    remember(userPubkey) {
+                        accountViewModel.checkGetOrCreateUser(userPubkey)
                     }
                 OutgoingChallengeCard(
                     opponentName = opponentName,
                     userPlaysWhite = challenge.challengerColor == ChessColor.WHITE,
                     onClick = { onOpenOwnChallenge(challenge) },
+                    avatar =
+                        challenge.opponentPubkey?.let { opPubkey ->
+                            {
+                                OverlappingAvatars(
+                                    avatar1Hex = userPubkey,
+                                    avatar2Hex = opPubkey,
+                                    avatar1Url = currentUser?.profilePicture(),
+                                    avatar2Url = opponentUser?.profilePicture(),
+                                )
+                            }
+                        },
                 )
             }
         }
@@ -442,11 +474,23 @@ fun ChessLobbyContent(
                             ?: accountViewModel.checkGetOrCreateUser(challenge.challengerPubkey)?.toBestDisplayName()
                             ?: challenge.challengerPubkey.take(8)
                     }
+                val currentUser =
+                    remember(userPubkey) {
+                        accountViewModel.checkGetOrCreateUser(userPubkey)
+                    }
                 ChallengeCard(
                     challengerName = displayName,
                     challengerPlaysWhite = challenge.challengerColor == ChessColor.WHITE,
                     isIncoming = true,
                     onAccept = { onAcceptChallenge(challenge) },
+                    avatar = {
+                        OverlappingAvatars(
+                            avatar1Hex = challenge.challengerPubkey,
+                            avatar2Hex = userPubkey,
+                            avatar1Url = challenge.challengerAvatarUrl,
+                            avatar2Url = currentUser?.profilePicture(),
+                        )
+                    },
                 )
             }
         }
@@ -471,11 +515,23 @@ fun ChessLobbyContent(
                             ?: accountViewModel.checkGetOrCreateUser(challenge.challengerPubkey)?.toBestDisplayName()
                             ?: challenge.challengerPubkey.take(8)
                     }
+                val currentUser =
+                    remember(userPubkey) {
+                        accountViewModel.checkGetOrCreateUser(userPubkey)
+                    }
                 ChallengeCard(
                     challengerName = displayName,
                     challengerPlaysWhite = challenge.challengerColor == ChessColor.WHITE,
                     isIncoming = false,
                     onAccept = { onAcceptChallenge(challenge) },
+                    avatar = {
+                        OverlappingAvatars(
+                            avatar1Hex = challenge.challengerPubkey,
+                            avatar2Hex = userPubkey,
+                            avatar1Url = challenge.challengerAvatarUrl,
+                            avatar2Url = currentUser?.profilePicture(),
+                        )
+                    },
                 )
             }
         }

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/chess/ChessPlayerChip.kt

@@ -0,0 +1,248 @@
+/*
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.commons.chess
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.border
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.offset
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.alpha
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.dp
+import com.vitorpamplona.amethyst.commons.ui.components.UserAvatar
+import androidx.compose.ui.graphics.Color as ComposeColor
+
+private val ActiveBorderColor = ComposeColor(0xFF4CAF50)
+private val AvatarOuterSize = 36.dp
+private val AvatarInnerSize = 32.dp // 4dp inset for border
+
+/**
+ * Single player chip showing avatar and name.
+ *
+ * @param displayName Player's display name
+ * @param userHex Player's public key hex (for Robohash fallback)
+ * @param avatarUrl Optional URL for the player's profile picture
+ * @param isActive Whether this player's turn is active (shows green border)
+ * @param mirrored If true, reverses the layout so name appears left of avatar (for right-side player)
+ * @param modifier Additional modifiers
+ */
+@Composable
+fun ChessPlayerChip(
+    displayName: String,
+    userHex: String,
+    avatarUrl: String?,
+    isActive: Boolean = false,
+    mirrored: Boolean = false,
+    modifier: Modifier = Modifier,
+) {
+    val avatar =
+        @Composable {
+            Box(
+                modifier =
+                    if (isActive) {
+                        Modifier
+                            .size(AvatarOuterSize)
+                            .border(2.dp, ActiveBorderColor, CircleShape)
+                            .clip(CircleShape)
+                    } else {
+                        Modifier
+                            .size(AvatarOuterSize)
+                            .clip(CircleShape)
+                    },
+            ) {
+                UserAvatar(
+                    userHex = userHex,
+                    pictureUrl = avatarUrl,
+                    size = AvatarInnerSize,
+                    modifier = Modifier.align(Alignment.Center),
+                )
+            }
+        }
+
+    val name =
+        @Composable {
+            Text(
+                text = displayName,
+                style = MaterialTheme.typography.bodyMedium,
+                fontWeight = if (isActive) FontWeight.Bold else FontWeight.Normal,
+                maxLines = 1,
+                overflow = TextOverflow.Ellipsis,
+            )
+        }
+
+    Row(
+        modifier = modifier.alpha(if (isActive) 1f else 0.6f),
+        verticalAlignment = Alignment.CenterVertically,
+        horizontalArrangement = Arrangement.spacedBy(6.dp),
+    ) {
+        if (mirrored) {
+            name()
+            avatar()
+        } else {
+            avatar()
+            name()
+        }
+    }
+}
+
+/**
+ * Full "White vs Black" header for the game board.
+ *
+ * Layout:
+ * ```
+ * [WhiteAvatar] WhiteName    vs    BlackName [BlackAvatar]
+ *               White                 Black
+ * ```
+ *
+ * Active player (based on isWhiteTurn) gets a green avatar border;
+ * inactive player is slightly dimmed.
+ *
+ * @param whiteName Display name for the white player
+ * @param whiteHex Public key hex for white player (Robohash fallback)
+ * @param whiteAvatarUrl Optional avatar URL for white player
+ * @param blackName Display name for the black player
+ * @param blackHex Public key hex for black player (Robohash fallback)
+ * @param blackAvatarUrl Optional avatar URL for black player
+ * @param isWhiteTurn Whether it is currently white's turn
+ * @param modifier Additional modifiers
+ */
+@Composable
+fun ChessPlayerVsHeader(
+    whiteName: String,
+    whiteHex: String,
+    whiteAvatarUrl: String?,
+    blackName: String,
+    blackHex: String,
+    blackAvatarUrl: String?,
+    isWhiteTurn: Boolean,
+    modifier: Modifier = Modifier,
+) {
+    Row(
+        modifier = modifier,
+        verticalAlignment = Alignment.CenterVertically,
+        horizontalArrangement = Arrangement.Center,
+    ) {
+        // White player (left side)
+        Column(
+            horizontalAlignment = Alignment.CenterHorizontally,
+            modifier = Modifier.weight(1f),
+        ) {
+            ChessPlayerChip(
+                displayName = whiteName,
+                userHex = whiteHex,
+                avatarUrl = whiteAvatarUrl,
+                isActive = isWhiteTurn,
+            )
+            Text(
+                text = "White",
+                style = MaterialTheme.typography.labelSmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+        }
+
+        Text(
+            text = "vs",
+            style = MaterialTheme.typography.bodyMedium,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+        )
+
+        // Black player (right side) — mirrored so avatar is on the right
+        Column(
+            horizontalAlignment = Alignment.CenterHorizontally,
+            modifier = Modifier.weight(1f),
+        ) {
+            ChessPlayerChip(
+                displayName = blackName,
+                userHex = blackHex,
+                avatarUrl = blackAvatarUrl,
+                isActive = !isWhiteTurn,
+                mirrored = true,
+            )
+            Text(
+                text = "Black",
+                style = MaterialTheme.typography.labelSmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+            )
+        }
+    }
+}
+
+/**
+ * Two overlapping circular avatars for compact game list cards.
+ *
+ * The second avatar is offset to overlap the first by 8dp.
+ *
+ * @param avatar1Hex Public key hex for first player (Robohash fallback)
+ * @param avatar2Hex Public key hex for second player (Robohash fallback)
+ * @param avatar1Url Optional avatar URL for first player
+ * @param avatar2Url Optional avatar URL for second player
+ * @param size Diameter of each avatar circle
+ * @param modifier Additional modifiers
+ */
+@Composable
+fun OverlappingAvatars(
+    avatar1Hex: String,
+    avatar2Hex: String,
+    avatar1Url: String?,
+    avatar2Url: String?,
+    size: Dp = 28.dp,
+    modifier: Modifier = Modifier,
+) {
+    Box(
+        modifier = modifier.size(width = size + size - 8.dp, height = size),
+    ) {
+        UserAvatar(
+            userHex = avatar1Hex,
+            pictureUrl = avatar1Url,
+            size = size,
+        )
+
+        Box(
+            modifier = Modifier.offset(x = size - 8.dp),
+        ) {
+            // Thin border to visually separate overlapping avatars
+            Box(
+                modifier =
+                    Modifier
+                        .size(size)
+                        .background(MaterialTheme.colorScheme.surface, CircleShape),
+            )
+            UserAvatar(
+                userHex = avatar2Hex,
+                pictureUrl = avatar2Url,
+                size = size,
+            )
+        }
+    }
+}

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/chess/LiveChessGame.kt

@@ -201,6 +201,12 @@ fun LiveChessGameScreen(
     onResign: () -> Unit,
     isSpectatorOverride: Boolean? = null,
     onGameEndDismiss: (() -> Unit)? = null,
+    whiteName: String = "White",
+    whiteHex: String = "",
+    whiteAvatarUrl: String? = null,
+    blackName: String = "Black",
+    blackHex: String = "",
+    blackAvatarUrl: String? = null,
 ) {
     // Observe state flows for automatic recomposition on updates
     val currentPosition by gameState.currentPosition.collectAsState()
@@ -236,6 +242,20 @@ fun LiveChessGameScreen(
                 horizontalAlignment = Alignment.CenterHorizontally,
                 verticalArrangement = Arrangement.spacedBy(8.dp),
             ) {
+                // Player vs Player avatar header
+                if (whiteHex.isNotEmpty() || blackHex.isNotEmpty()) {
+                    ChessPlayerVsHeader(
+                        whiteName = whiteName,
+                        whiteHex = whiteHex,
+                        whiteAvatarUrl = whiteAvatarUrl,
+                        blackName = blackName,
+                        blackHex = blackHex,
+                        blackAvatarUrl = blackAvatarUrl,
+                        isWhiteTurn = currentPosition.activeColor == Color.WHITE,
+                        modifier = Modifier.fillMaxWidth(),
+                    )
+                }
+
                 // Game info - use currentPosition.activeColor for turn display
                 GameInfoHeader(
                     gameId = gameState.startEventId,

desktopApp/src/jvmMain/kotlin/com/vitorpamplona/amethyst/desktop/chess/ChessScreen.kt

@@ -268,6 +268,10 @@ fun ChessScreen(
                 val wasAccepted = viewModel.wasAccepted(selectedGameId!!)
                 val isSpectating = !wasAccepted && spectatingGames.containsKey(selectedGameId)
 
+                val isPlayerWhite = gameState.playerColor == ChessColor.WHITE
+                val whitePubkey = if (isPlayerWhite) gameState.playerPubkey else gameState.opponentPubkey
+                val blackPubkey = if (isPlayerWhite) gameState.opponentPubkey else gameState.playerPubkey
+
                 DesktopChessGameLayout(
                     gameState = gameState,
                     opponentName = viewModel.userMetadataCache.getDisplayName(gameState.opponentPubkey),
@@ -278,6 +282,12 @@ fun ChessScreen(
                     onResign = { viewModel.resign(gameState.startEventId) },
                     isSpectatorOverride = isSpectating,
                     compactMode = compactMode,
+                    whiteName = viewModel.userMetadataCache.getDisplayName(whitePubkey),
+                    whiteHex = whitePubkey,
+                    whiteAvatarUrl = viewModel.userMetadataCache.getPictureUrl(whitePubkey),
+                    blackName = viewModel.userMetadataCache.getDisplayName(blackPubkey),
+                    blackHex = blackPubkey,
+                    blackAvatarUrl = viewModel.userMetadataCache.getPictureUrl(blackPubkey),
                 )
             }
         } else {
@@ -398,10 +408,11 @@ private fun ChessLobby(
                     isYourTurn = state.isPlayerTurn(),
                     onClick = { onSelectGame(gameId) },
                     avatar = {
-                        UserAvatar(
+                        com.vitorpamplona.amethyst.commons.chess.OverlappingAvatars(
-                            userHex = state.opponentPubkey,
+                            avatar1Hex = state.playerPubkey,
-                            pictureUrl = metadataCache.getPictureUrl(state.opponentPubkey),
+                            avatar2Hex = state.opponentPubkey,
-                            size = 40.dp,
+                            avatar1Url = metadataCache.getPictureUrl(state.playerPubkey),
+                            avatar2Url = metadataCache.getPictureUrl(state.opponentPubkey),
                         )
                     },
                 )
@@ -429,10 +440,11 @@ private fun ChessLobby(
                     avatar =
                         challenge.opponentPubkey?.let { pubkey ->
                             {
-                                UserAvatar(
+                                com.vitorpamplona.amethyst.commons.chess.OverlappingAvatars(
-                                    userHex = pubkey,
+                                    avatar1Hex = userPubkey,
-                                    pictureUrl = metadataCache.getPictureUrl(pubkey),
+                                    avatar2Hex = pubkey,
-                                    size = 40.dp,
+                                    avatar1Url = metadataCache.getPictureUrl(userPubkey),
+                                    avatar2Url = metadataCache.getPictureUrl(pubkey),
                                 )
                             }
                         },
@@ -481,10 +493,11 @@ private fun ChessLobby(
                     isIncoming = true,
                     onAccept = { onAcceptChallenge(challenge) },
                     avatar = {
-                        UserAvatar(
+                        com.vitorpamplona.amethyst.commons.chess.OverlappingAvatars(
-                            userHex = challenge.challengerPubkey,
+                            avatar1Hex = challenge.challengerPubkey,
-                            pictureUrl = challenge.challengerAvatarUrl ?: metadataCache.getPictureUrl(challenge.challengerPubkey),
+                            avatar2Hex = userPubkey,
-                            size = 40.dp,
+                            avatar1Url = challenge.challengerAvatarUrl ?: metadataCache.getPictureUrl(challenge.challengerPubkey),
+                            avatar2Url = metadataCache.getPictureUrl(userPubkey),
                         )
                     },
                 )
@@ -511,10 +524,11 @@ private fun ChessLobby(
                     isIncoming = false,
                     onAccept = { onAcceptChallenge(challenge) },
                     avatar = {
-                        UserAvatar(
+                        com.vitorpamplona.amethyst.commons.chess.OverlappingAvatars(
-                            userHex = challenge.challengerPubkey,
+                            avatar1Hex = challenge.challengerPubkey,
-                            pictureUrl = challenge.challengerAvatarUrl ?: metadataCache.getPictureUrl(challenge.challengerPubkey),
+                            avatar2Hex = userPubkey,
-                            size = 40.dp,
+                            avatar1Url = challenge.challengerAvatarUrl ?: metadataCache.getPictureUrl(challenge.challengerPubkey),
+                            avatar2Url = metadataCache.getPictureUrl(userPubkey),
                         )
                     },
                 )
@@ -601,6 +615,12 @@ private fun DesktopChessGameLayout(
     onResign: () -> Unit,
     isSpectatorOverride: Boolean? = null,
     compactMode: Boolean = false,
+    whiteName: String = "White",
+    whiteHex: String = "",
+    whiteAvatarUrl: String? = null,
+    blackName: String = "Black",
+    blackHex: String = "",
+    blackAvatarUrl: String? = null,
 ) {
     // Collect state flows to trigger recomposition on changes
     val currentPosition by gameState.currentPosition.collectAsState()
@@ -628,20 +648,39 @@ private fun DesktopChessGameLayout(
             modifier = Modifier.fillMaxSize(),
             horizontalArrangement = Arrangement.spacedBy(if (showInfoPanel) 24.dp else 0.dp),
         ) {
-            // Left side: Chess board + toggle
+            // Left side: Chess board + toggle + vs header
             Box(
                 modifier = Modifier.weight(1f).fillMaxHeight(),
                 contentAlignment = Alignment.Center,
             ) {
-                InteractiveChessBoard(
+                Column(
-                    engine = engine,
+                    horizontalAlignment = Alignment.CenterHorizontally,
-                    boardSize = boardSize,
+                    verticalArrangement = Arrangement.spacedBy(8.dp),
-                    flipped = if (isSpectator) false else playerColor == com.vitorpamplona.quartz.nip64Chess.Color.BLACK,
+                ) {
-                    playerColor = playerColor,
+                    // Player vs Player header above board
-                    isSpectator = isSpectator,
+                    if (whiteHex.isNotEmpty() || blackHex.isNotEmpty()) {
-                    positionVersion = moveHistory.size,
+                        com.vitorpamplona.amethyst.commons.chess.ChessPlayerVsHeader(
-                    onMoveMade = onMoveMade,
+                            whiteName = whiteName,
-                )
+                            whiteHex = whiteHex,
+                            whiteAvatarUrl = whiteAvatarUrl,
+                            blackName = blackName,
+                            blackHex = blackHex,
+                            blackAvatarUrl = blackAvatarUrl,
+                            isWhiteTurn = currentPosition.activeColor == ChessColor.WHITE,
+                            modifier = Modifier.fillMaxWidth(),
+                        )
+                    }
+
+                    InteractiveChessBoard(
+                        engine = engine,
+                        boardSize = boardSize,
+                        flipped = if (isSpectator) false else playerColor == com.vitorpamplona.quartz.nip64Chess.Color.BLACK,
+                        playerColor = playerColor,
+                        isSpectator = isSpectator,
+                        positionVersion = moveHistory.size,
+                        onMoveMade = onMoveMade,
+                    )
+                }
 
                 // Toggle button anchored to top-end of board area
                 IconButton(