diff --git a/css/chess.css b/css/chess.css
index 102262e..cf688a3 100644
--- a/css/chess.css
+++ b/css/chess.css
@@ -289,6 +289,7 @@ button:disabled .silhouette {
    width: 100%;
    height: 100%;
    background-color: rgba(128,128,128,0.5);
+   z-index: 10;
 }
 
 .cb-lt-piece, .cb-dk-piece {