diff --git a/src/othello/Main.java b/src/othello/Main.java
index 1b14ff0..ffa11c8 100644
--- a/src/othello/Main.java
+++ b/src/othello/Main.java
@@ -19,6 +19,7 @@ public class Main {
 		System.out.println("joueur 1: " + p1);
 		System.out.println("joueur 2: " + p2);
 		while(!game.isOver()) {
+			State.previousSituations.add(game.toString());
 			Player player = game.getCurrentPlayer();
 			System.out.println(game.toString());
 			game = game.play(player.play(game));
diff --git a/src/othello/MainStats.java b/src/othello/MainStats.java
index 02e0f69..c0888ef 100644
--- a/src/othello/MainStats.java
+++ b/src/othello/MainStats.java
@@ -26,6 +26,7 @@ public class MainStats {
 		PrintWriter writer2 = new PrintWriter("statsj2.txt");
 
 		while(!game.isOver()) {
+			State.previousSituations.add(game.toString());
 			Player player = game.getCurrentPlayer();
 			System.out.println(game.toString());
 			game = game.play(player.play(game));
diff --git a/src/othello/State.java b/src/othello/State.java
index 523aebd..126d3ef 100644
--- a/src/othello/State.java
+++ b/src/othello/State.java
@@ -12,7 +12,7 @@ public class State {
 	 * been played, the game ends.
 	 * We only keep the 10 previous situations due to performances issues
 	 */
-	public static List<Player[][]> previousSituations = new LinkedList<>();
+	public static List<String> previousSituations = new LinkedList<>();
 
 	private final Player[][] board;
 	private final Player player1;
@@ -32,7 +32,7 @@ public class State {
 	
 	public boolean isOver() {
 		return n1 == 0 || n2 == 0 || (getMove(player1).isEmpty() && getMove(player2).isEmpty())
-				|| previousSituations.contains(this.board);
+				|| previousSituations.contains(toString());
 	}
 
 	/**
@@ -101,9 +101,8 @@ public class State {
 	 * @return a modified copy of the current situation
 	 */
 	public State play(Pair<Point,Point> move) {
-		if(previousSituations.size() == 10) // on ne garde que les 10 dernieres situations par soucis de perfs
+		if(previousSituations.size() == 15) // on ne garde que les 10 dernieres situations par soucis de perfs
 			previousSituations.remove(0);
-		previousSituations.add(board);
 		State copy = this.copy();
 		boolean isJump = move.getLeft().isJump(move.getRight(), copy.board);
 		copy.board[move.getRight().getY()][move.getRight().getX()] = copy.currentPlayer;
diff --git a/statsj1.txt b/statsj1.txt
index e69de29..2382333 100644
--- a/statsj1.txt
+++ b/statsj1.txt
@@ -0,0 +1,33 @@
+6
+16
+29
+46
+66
+98
+134
+166
+208
+233
+262
+291
+327
+382
+442
+497
+537
+590
+651
+680
+718
+758
+786
+804
+812
+828
+853
+863
+889
+918
+945
+974
+1003
diff --git a/statsj2.txt b/statsj2.txt
index e69de29..8d020c1 100644
--- a/statsj2.txt
+++ b/statsj2.txt
@@ -0,0 +1,33 @@
+6
+16
+28
+39
+42
+52
+68
+82
+111
+139
+172
+208
+224
+234
+248
+261
+278
+281
+294
+318
+350
+387
+437
+480
+524
+557
+587
+632
+664
+689
+711
+733
+757