diff --git a/ui/index.html b/ui/index.html
index 4a93006..021827a 100644
--- a/ui/index.html
+++ b/ui/index.html
@@ -83,6 +83,7 @@
             i = i-3;
             prvnihra[i].focus(); 
         }
+        document.body.requestFullscreen();
    })
         
 </script>