diff --git a/src/utils/game.util.ts b/src/utils/game.util.ts
index b2fac43..0c9fd81 100644
--- a/src/utils/game.util.ts
+++ b/src/utils/game.util.ts
@@ -89,6 +89,8 @@ let gameUtil = {
     checkDiscard(cardsLst: Card[]) {
         if (cardsLst.length == 0 || cardsLst.length == 2) {
             return false
+        } else if (cardsLst.length == 1) {
+            return true;
         }
         let numSet: number[] = [];
         cardsLst.forEach(function (value) {