diff --git a/public/game.html b/public/game.html
index 09c83ac..cf1474a 100644
--- a/public/game.html
+++ b/public/game.html
@@ -115,6 +115,8 @@
     if(id.indexOf('coin') !== -1 || id === 'coin_coin') return 'owned';
     // teleportation: require selecting one of your pieces first (like promotion)
     if(id.indexOf('teleport') !== -1 || id.indexOf('tele') !== -1 || id.indexOf('t_l_portation') !== -1) return 'owned';
+    // inversion: first choose one of your pieces, then choose an enemy piece to swap places
+    if(id.indexOf('inversion') !== -1) return 'own_then_enemy';
       return null;
     }
 
@@ -483,8 +485,35 @@
 
         // If we're in a pending card-targeting mode, handle target selection and do NOT attempt moves
         if(pendingCard){
-          const req = pendingCard.requireType; // 'empty' | 'owned' | 'owned_pawn' | 'enemy'
+          const req = pendingCard.requireType; // 'empty' | 'owned' | 'owned_pawn' | 'enemy' | 'own_then_enemy' | 'enemy_queen'
           const myShort = (myColor && myColor[0]) || '';
+          // handle two-step selection for cards like 'inversion'
+          if(req === 'own_then_enemy'){
+            // first select one of your own pieces
+            if(!pendingCard.firstTarget){
+              const piece = currentBoardState && Array.isArray(currentBoardState.pieces) && currentBoardState.pieces.find(p => p.square === square);
+              if(!piece || piece.color !== myShort){ log('select one of your pieces (first)'); return; }
+              if(piece.type && piece.type.toLowerCase() === 'k'){ log('cannot select king'); return; }
+              // store first selection and highlight enemy pieces
+              pendingCard.firstTarget = square;
+              highlightTargets('enemy');
+              // mark visually the chosen source (temporary)
+              try{ const el = boardEl.querySelector(`.square[data-square="${square}"]`); if(el) el.classList.add('target-chosen'); }catch(_){ }
+              log('First piece selected for inversion:', square);
+              return;
+            }
+            // second selection: enemy piece to swap with
+            const occ = currentBoardState && Array.isArray(currentBoardState.pieces) && currentBoardState.pieces.find(p => p.square === square);
+            if(!occ || occ.color === myShort){ log('select an enemy piece (second)'); return; }
+            // emit swap payload: sourceSquare + targetSquare
+            socket.emit('card:play', { roomId, playerId: myPlayerId, cardId: pendingCard.cardId, payload: { sourceSquare: pendingCard.firstTarget, targetSquare: square } }, (resp)=>{
+              if(resp && resp.error){ log('card:play error', resp); alert(resp.error); }
+              else { log('inversion played', resp); }
+            });
+            // cleanup visuals
+            try{ const el = boardEl.querySelector(`.square[data-square="${pendingCard.firstTarget}"]`); if(el) el.classList.remove('target-chosen'); }catch(_){ }
+            pendingCard = null; clearTargetHighlights(); return;
+          }
           if(req === 'empty'){
             const occupied = currentBoardState && Array.isArray(currentBoardState.pieces) && currentBoardState.pieces.find(p => p.square === square);
             if(occupied){ log('square not empty for mine placement'); return; }
@@ -497,6 +526,7 @@
           } else if(req === 'owned'){
             const piece = currentBoardState && Array.isArray(currentBoardState.pieces) && currentBoardState.pieces.find(p => p.square === square);
             if(!piece || piece.color !== myShort){ log('select one of your pieces'); return; }
+            if(piece.type && piece.type.toLowerCase() === 'k'){ log('cannot select king'); return; }
             socket.emit('card:play', { roomId, playerId: myPlayerId, cardId: pendingCard.cardId, payload: { targetSquare: square } }, (resp)=>{
               if(resp && resp.error){ log('card:play error', resp); alert(resp.error); }
               else { log('card played with target', resp); }
@@ -524,6 +554,7 @@
           } else if(req === 'enemy'){
             const occ = currentBoardState && Array.isArray(currentBoardState.pieces) && currentBoardState.pieces.find(p => p.square === square);
             if(!occ || occ.color === myShort){ log('select an enemy piece'); return; }
+            if(occ.type && occ.type.toLowerCase() === 'k'){ log('cannot select king'); return; }
             socket.emit('card:play', { roomId, playerId: myPlayerId, cardId: pendingCard.cardId, payload: { targetSquare: square } }, (resp)=>{
               if(resp && resp.error){ log('card:play error', resp); alert(resp.error); }
               else { log('card played with target', resp);
@@ -724,16 +755,20 @@
           if(!occ) sqEl.classList.add('targetable');
         } else if(type === 'owned'){
           const occ = (currentBoardState.pieces||[]).find(p=>p.square===sq);
-          if(occ && occ.color === myShort) sqEl.classList.add('targetable');
+          if(occ && occ.color === myShort && occ.type && occ.type.toLowerCase() !== 'k') sqEl.classList.add('targetable');
         } else if(type === 'owned_pawn'){
           const occ = (currentBoardState.pieces||[]).find(p=>p.square===sq);
           if(occ && occ.color === myShort && occ.type && occ.type.toLowerCase() === 'p') sqEl.classList.add('targetable');
+        } else if(type === 'own_then_enemy'){
+          // initial phase: highlight only own pieces (client will switch to enemy after first selection)
+          const occ = (currentBoardState.pieces||[]).find(p=>p.square===sq);
+          if(occ && occ.color === myShort && occ.type && occ.type.toLowerCase() !== 'k') sqEl.classList.add('targetable');
         } else if(type === 'enemy_queen'){
           const occ = (currentBoardState.pieces||[]).find(p=>p.square===sq);
           if(occ && occ.color && occ.color !== myShort && occ.type && occ.type.toLowerCase() === 'q') sqEl.classList.add('targetable');
         } else if(type === 'enemy'){
           const occ = (currentBoardState.pieces||[]).find(p=>p.square===sq);
-          if(occ && occ.color && occ.color !== myShort) sqEl.classList.add('targetable');
+          if(occ && occ.color && occ.color !== myShort && occ.type && occ.type.toLowerCase() !== 'k') sqEl.classList.add('targetable');
         }
       });
       // add a small note near hands
diff --git a/server.js b/server.js
index 5fee77d..d66e025 100644
--- a/server.js
+++ b/server.js
@@ -136,6 +136,48 @@ function visibleSquaresForPlayer(room, playerId){
   return out;
 }
 
+// Helper to end a player's turn after playing a card: flip turn, decrement per-turn effects and trigger next player's draw
+function endTurnAfterCard(room, senderId){
+  try{
+    if(!room || !room.boardState) return;
+    const board = room.boardState;
+    // flip turn
+    if(board.turn) board.turn = (board.turn === 'w') ? 'b' : 'w';
+    // decrement remainingTurns for any time-limited effects that belong to the player who just finished their turn
+    try{
+      room.activeCardEffects = room.activeCardEffects || [];
+      for(let i = room.activeCardEffects.length - 1; i >= 0; i--){
+        const e = room.activeCardEffects[i];
+        if(typeof e.remainingTurns === 'number'){
+          let shouldDecrement = false;
+          if(e.decrementOn === 'opponent'){
+            shouldDecrement = (e.playerId !== senderId);
+          } else if(e.decrementOn === 'owner'){
+            shouldDecrement = (e.playerId === senderId);
+          } else {
+            shouldDecrement = (e.playerId === senderId);
+          }
+          if(shouldDecrement){
+            e.remainingTurns = e.remainingTurns - 1;
+            try{ io.to(room.id).emit('card:effect:updated', { roomId: room.id, effect: e }); }catch(_){ }
+            if(e.remainingTurns <= 0){ room.activeCardEffects.splice(i,1); try{ io.to(room.id).emit('card:effect:removed', { roomId: room.id, effectId: e.id, type: e.type, playerId: e.playerId }); }catch(_){ } }
+          }
+        }
+      }
+    }catch(e){ console.error('updating temporary effects error', e); }
+
+    // reset per-turn card-play flags
+    try{ room._cardPlayedThisTurn = {}; }catch(_){ }
+
+    // perform next player's draw (if autoDraw) or at least send room update
+    try{ 
+      const nextColor = board.turn;
+      const nextPlayer = room.players.find(p => (p.color && p.color[0]) === nextColor);
+      if(nextPlayer){ maybeDrawAtTurnStart(room, nextPlayer.id); } else { sendRoomUpdate(room); }
+    }catch(_){ sendRoomUpdate(room); }
+  }catch(e){ console.error('endTurnAfterCard error', e); }
+}
+
 // Build a default deck from README list. Each card has a unique id, cardId (slug), title and description.
 function buildDefaultDeck(){
   const cards = [
@@ -174,7 +216,7 @@ function buildDefaultDeck(){
     ["toucher c'est jouer","Toucher une pièce adverse qu'il sera obligé de jouer"],
     // ['marécage','Pendant X tours, toutes les pièces ne peuvent se déplacer que comme un roi'],
     // ['sniper','Capturer une pièce sans avoir à bouger la pièce capturante'],
-    // ['inversion','Échange la position d une pièce avec une pièce adverse'],
+    ['inversion','Échange la position d une pièce avec une pièce adverse'],
     // ['jeu des 7 différences','Déplace une pièce du plateau pendant que le joueur adverse à les yeux fermés. S il la retrouve, elle est capturée, laissée sinon'],
     // ['punching ball','Replace le roi dans sa position initiale, et place un nouveau pion à l ancienne position du roi'],
     // ['reversi','Si deux pions encadrent parfaitement une pièce adverse, cette dernière change de camp'],
@@ -1412,6 +1454,50 @@ io.on('connection', (socket) => {
               try{ io.to(room.id).emit('card:effect:applied', { roomId: room.id, effect: { id: played.id, type: 'parrure', pieceId: targetPiece.id, pieceSquare: targetPiece.square, playerId: senderId } }); }catch(_){ }
             }catch(e){ console.error('parrure apply error', e); }
           }catch(e){ console.error('parrure effect error', e); }
+        }
+        // inversion: pick one of your pieces, then pick an enemy piece — swap their squares
+        else if((typeof cardId === 'string' && cardId.indexOf('inversion') !== -1) || cardId === 'inversion'){
+          try{
+            const board = room.boardState;
+            const payloadSrc = payload && payload.sourceSquare;
+            const payloadTgt = payload && payload.targetSquare;
+            // fallback to lastSelectedSquare for source if client didn't provide both
+            let source = payloadSrc || null;
+            let target = payloadTgt || null;
+            if(!source){ try{ source = socket.data && socket.data.lastSelectedSquare; }catch(_){ source = null; } }
+            if(!target){ /* nothing */ }
+            const roomPlayer = room.players.find(p => p.id === senderId);
+            const playerColorShort = (roomPlayer && roomPlayer.color && roomPlayer.color[0]) || null;
+            const srcPiece = (board && board.pieces || []).find(p => p.square === source);
+            const tgtPiece = (board && board.pieces || []).find(p => p.square === target);
+            // validate both pieces exist and belong respectively to player and opponent
+            if(!board || !source || !target || !srcPiece || !tgtPiece || srcPiece.color !== playerColorShort || tgtPiece.color === playerColorShort){
+              // invalid target(s): restore removed card to hand and abort
+              try{ room.hands = room.hands || {}; room.hands[senderId] = room.hands[senderId] || []; if(removed) room.hands[senderId].push(removed); room.discard = room.discard || []; for(let i = room.discard.length - 1; i >= 0; i--){ if(room.discard[i] && room.discard[i].id === (removed && removed.id)){ room.discard.splice(i,1); break; } } }catch(e){ console.error('restore removed card error', e); }
+              return cb && cb({ error: 'no valid targets' });
+            }
+            // swap their squares
+            try{
+              const sSquare = srcPiece.square;
+              const tSquare = tgtPiece.square;
+              srcPiece.square = tSquare;
+              tgtPiece.square = sSquare;
+              // update any activeCardEffects that reference squares
+              try{
+                room.activeCardEffects = room.activeCardEffects || [];
+                room.activeCardEffects.forEach(e => {
+                  try{
+                    if(e && e.pieceSquare && e.pieceSquare === sSquare) e.pieceSquare = tSquare;
+                    else if(e && e.pieceSquare && e.pieceSquare === tSquare) e.pieceSquare = sSquare;
+                  }catch(_){ }
+                });
+              }catch(_){ }
+              // bump board version
+              try{ board.version = (board.version || 0) + 1; }catch(_){ }
+              played.payload = Object.assign({}, payload, { applied: 'inversion', from: source, to: target });
+              try{ io.to(room.id).emit('card:effect:applied', { roomId: room.id, effect: { id: played.id, type: 'inversion', swapped: [srcPiece.id, tgtPiece.id], playerId: senderId } }); }catch(_){ }
+            }catch(e){ console.error('inversion apply error', e); }
+          }catch(e){ console.error('inversion effect error', e); }
       }
       // teleportation: allow the selected piece to move to any empty square for one turn
       else if((typeof cardId === 'string' && (cardId.indexOf('teleport') !== -1 || cardId.indexOf('t_l_portation') !== -1 || cardId.indexOf('t_lportation') !== -1)) || cardId === 'teleport'){
@@ -2029,8 +2115,8 @@ io.on('connection', (socket) => {
   }catch(e){ console.error('mark card played error', e); }
   // emit card played to entire room (informational)
   io.to(roomId).emit('card:played', played);
-  // send personalized room updates (will include updated hands and discardCount)
-  sendRoomUpdate(room);
+  // After playing a card, the player's turn is consumed: perform end-of-turn bookkeeping then send updates
+  try{ endTurnAfterCard(room, played.playerId); }catch(_){ /* fallback to simple update */ sendRoomUpdate(room); }
 
     cb && cb({ ok: true, played });
   });