diff --git a/app.py b/app.py
index c21bdc7..9bda8fe 100644
--- a/app.py
+++ b/app.py
@@ -471,7 +471,7 @@ def generate_valid_moves(
         king_safe = True
         for i in range(8):
             for j in range(8):
-                p = board.grid[i][j]
+                p = board.grid[j][i]
                 if p != Piece.EMPTY and p.value.isupper() != is_white:
                     # Enemy
                     enemy_moves = get_piece_moves(