diff --git a/src/ai/negamax.js b/src/ai/negamax.js
index 51b00cd..a9e7b5a 100644
--- a/src/ai/negamax.js
+++ b/src/ai/negamax.js
@@ -41,7 +41,7 @@ var negamax = function(deep, alpha, beta) {
     var p = candidates[i]
     board.put(p, R.com)
     var steps = [p[0], p[1]]
-    var v = r(deep-1, -beta, -alpha, R.hum, 2, steps.slice(0), 0)
+    var v = r(deep-1, -beta, -alpha, R.hum, 1, steps.slice(0), 0)
     v.score *= -1
     alpha = Math.max(alpha, v.score)
     board.remove(p)
diff --git a/src/views/home.js b/src/views/home.js
index f7900b5..5ae131c 100644
--- a/src/views/home.js
+++ b/src/views/home.js
@@ -37,11 +37,11 @@ export default {
       this._set(position, 1)
       this.$store.dispatch(SET_STATUS, STATUS.PLAYING)
 
-      if (score >= SCORE.FIVE/2 && step <= 2) {
+      if (score >= SCORE.FIVE/2 && step <= 1) {
         this.$store.dispatch(SET_FIVES, win(this.board))
         this.$store.dispatch(SET_STATUS, STATUS.LOCKED)
         this.showBigText(this.$t('you lose'), this.end)
-      } else if (score <= - SCORE.FIVE/2 && step <= 2) {
+      } else if (score <= - SCORE.FIVE/2 && step <= 1) {
         this.$store.dispatch(SET_FIVES, win(this.board))
         this.$store.dispatch(SET_STATUS, STATUS.LOCKED)
         this.showBigText(this.$t('you win'), this.end)
diff --git a/tests/unit/AI.time.spec.js b/tests/unit/AI.time.spec.js
index 3b1c4bd..8206ca9 100644
--- a/tests/unit/AI.time.spec.js
+++ b/tests/unit/AI.time.spec.js
@@ -1,4 +1,4 @@
-import { expect } from 'chai'
+import { expect, assert } from 'chai'
 
 import board from '@/ai/board.js'
 import Search from '@/ai/negamax.js'
@@ -52,4 +52,70 @@ describe('Test Time', () => {
 
     expect(p.score <= - SCORE.FIVE/2).to.be.true
   })
+
+	it(`此处有杀棋, 只有 [6, 5], [5, 4] 两种走法有杀棋`, function() {
+    const b = [
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 2, 1, 2, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+    ];
+    board.init(b);
+    var p = Search(10);
+    console.log("######", p);
+    assert.ok(p.score > 1500);
+    assert.ok((p[0] == 6 && p[1] === 5) || (p[0] == 5 && p[1] === 4));
+  });
+  it(`测试vct bug，此处应该没有杀棋`, function() {
+    const b = [
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 2, 1, 2, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+    ];
+    board.init(b);
+    console.log(board.gen())
+    var p = Search();
+    console.log("######", p);
+    assert.ok(p.score < 2000);
+  });
+  it(`测试冲四活三bug`, function() {
+    const b = [
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 2, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 2, 1, 1, 1, 1, 2, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 2, 1, 1, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 2, 1, 2, 1, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 2, 2, 1, 0, 2, 2, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+      [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+    ];
+    board.init(b);
+    console.log(board.gen())
+    var p = Search();
+    console.log("######", p);
+    // 冲四活三
+    assert.ok(p.score > 2000);
+  });
 })