diff --git a/src/main/java/Game/ChessObj/ChessFigure.java b/src/main/java/Game/ChessObj/ChessFigure.java
index 0b06f00..029b233 100644
--- a/src/main/java/Game/ChessObj/ChessFigure.java
+++ b/src/main/java/Game/ChessObj/ChessFigure.java
@@ -78,7 +78,7 @@ public class ChessFigure {
                     return true;
                 break;
             case BISHOP:
-                if (dx == dy)
+                if (Math.abs(dx) == Math.abs(dy))
                     return true;
                 break;
             case KNIGHT:
diff --git a/src/test/java/Game/ChessObj/ChessFigureTest.java b/src/test/java/Game/ChessObj/ChessFigureTest.java
index 1542ef4..2232596 100644
--- a/src/test/java/Game/ChessObj/ChessFigureTest.java
+++ b/src/test/java/Game/ChessObj/ChessFigureTest.java
@@ -80,7 +80,7 @@ class ChessFigureTest {
                             }
                             break;
                         case BISHOP:
-                            if (x == y) {
+                            if (Math.abs(x) == Math.abs(y)) {
                                 assertTrue(figure.isRelativeMoveValid(x, y));
                                 continue;
                             }