diff --git a/www/js/game.js b/www/js/game.js
index 8d53d20..6127027 100644
--- a/www/js/game.js
+++ b/www/js/game.js
@@ -517,7 +517,7 @@ GAME.Game = class {
                                     if(dist == 1) { check = GAME.Const.Check.Direct; }
                                     else { check = GAME.Const.Check.Stride; }
 
-                                    if(stride) { block = dir_mask; }
+                                    if(stride > 0) { block = dir_mask; }
 
                                     // Apply check to previous moves.
                                     for(let idist = 1; idist < dist; idist++) {
@@ -525,7 +525,7 @@ GAME.Game = class {
                                     }
                                 }
 
-                                if(pieces_blocking == 1 && stride) {
+                                if(pieces_blocking == 1 && stride > 0) {
                                     // Apply blocking to last .
                                     for(let idist = 1; idist < dist; idist++) {
                                         if(this.board.tiles[tiles[tiles.length - idist].tile].piece !== null) {