diff --git a/src/main/java/de/tims/tictactoe/GameLogic.java b/src/main/java/de/tims/tictactoe/GameLogic.java
index ffaa984..568de32 100644
--- a/src/main/java/de/tims/tictactoe/GameLogic.java
+++ b/src/main/java/de/tims/tictactoe/GameLogic.java
@@ -68,9 +68,15 @@ public class GameLogic {
         for (int i = this.board.length - 1, j = this.board.length - 1; i >= 0 ; i--, j--) {
             if (board[i][j] == player) countFields++;
         }
+        if(countFields == this.board.length) return finished = true;
+        countFields = 0;
+        
+        // check diagonal right
+        for (int i = this.board.length - 1, j = 0; i >= 0 ; i--, j++) {
+            if (board[i][j] == player) countFields++;
+        }
         if(countFields == this.board.length) return finished = true;
 
-		
 		return finished;
 	}
 
diff --git a/src/test/java/de/tims/tictactoe/GameLogicTest.java b/src/test/java/de/tims/tictactoe/GameLogicTest.java
index 216e02c..58abc9d 100644
--- a/src/test/java/de/tims/tictactoe/GameLogicTest.java
+++ b/src/test/java/de/tims/tictactoe/GameLogicTest.java
@@ -205,7 +205,11 @@ class GameLogicTest {
 		    			Arguments.of("check diagonal left win for player 1", 'x', true, new char[][] 
 																				 {{'x', 'o', 'x'}, 
 																				  {'x', 'x', 'o'},
-																				  {'o', 'o', 'x'}})
+																				  {'o', 'o', 'x'}}),
+		    			Arguments.of("check diagonal right win for player 2", 'o', true, new char[][] 
+																						 {{'x', 'x', 'o'}, 
+																						  {'x', 'o', 'o'},
+																						  {'o', 'x', 'x'}})
 		    		);
 	 }