diff --git a/Compete/Game.cpp b/Compete/Game.cpp
index 1df4449..f26f055 100644
--- a/Compete/Game.cpp
+++ b/Compete/Game.cpp
@@ -17,7 +17,7 @@ bool GameState::_checkEnd() const {
 		if (C[cp][i] >= (n + 1) / 2)
 			v += 1;
 	}
-	return v >= 4;
+	return v >= (n + 1) / 2;
 }
 
 bool GameState::move(int x, int y) {
diff --git a/Strategy/Strategy.cpp b/Strategy/Strategy.cpp
index 23b6395..fd979b7 100644
--- a/Strategy/Strategy.cpp
+++ b/Strategy/Strategy.cpp
@@ -16,7 +16,7 @@ std::tuple<int, int> getMove(int lstX, int lstY) {
 	if (lstX != -1) {
 		ctl[0][B[lstX][lstY]] += 1;
 		int t = B[lstX][lstY];
-		if (ctl[0][B[lstX][lstY]] >= 4) {
+		if (ctl[0][B[lstX][lstY]] >= (N + 1) / 2) {
 			for (int i = 0; i < N; ++i) {
 				for (int j = 0; j < N; ++j) {
 					if (B[i][j] == t)
@@ -40,7 +40,7 @@ std::tuple<int, int> getMove(int lstX, int lstY) {
 			if (flag && B[i][j] != -1) {
 				ctl[1][B[i][j]] += 1;
 
-				if (ctl[1][B[i][j]] >= 4) {
+				if (ctl[1][B[i][j]] >= (N + 1) / 2) {
 					int t = B[i][j];
 					for (int i = 0; i < N; ++i) {
 						for (int j = 0; j < N; ++j) {