diff --git a/src/main/c/VierGewinnt.c b/src/main/c/VierGewinnt.c
index 5959d98..2ae4fc6 100644
--- a/src/main/c/VierGewinnt.c
+++ b/src/main/c/VierGewinnt.c
@@ -150,3 +150,19 @@ int dropPiece(char board[ROWS][COLS], int col, char player) {
 
     return 0; // Column is full
 }
+
+
+// Write checkHorizontal function
+int checkHorizontal(char board[ROWS][COLS], char player) {
+    for (int row = 0; row < ROWS; row++) {
+        for (int col = 0; col <= COLS - 4; col++) {
+            if (board[row][col] == player &&
+                board[row][col + 1] == player &&
+                board[row][col + 2] == player &&
+                board[row][col + 3] == player) {
+                return 1;  // Gewonnen
+            }
+        }
+    }
+    return 0;
+}