diff --git a/src/main/c/Minesweeper/minesweeper_start.c b/src/main/c/Minesweeper/minesweeper_start.c
index 85dc9d1..50bb461 100644
--- a/src/main/c/Minesweeper/minesweeper_start.c
+++ b/src/main/c/Minesweeper/minesweeper_start.c
@@ -24,6 +24,7 @@ Minesweeper_Board initialize_minesweeper();
 void place_bombs(Minesweeper_Board *board);
 bool bomb_in_array(int array[], int bomb, int length);
 void draw_minesweeper(Minesweeper_Board board);
+int open_tile(Minesweeper_Board *board, int tile);
 #pragma endregion
 
 #pragma region Global
@@ -84,8 +85,9 @@ void game_minesweeper(){
         printf("Next turn (x, y, t(0 = open, 1 = flag)): ");
         scanf("%d %d %d", &x, &y, &t);
         getchar();
-        if(x < board.width && y < board.height){
+        if(x < board.width && x > -1 && y < board.height && y > -1){
             x = x + y * board.width;
+            if(t == 0){running = open_tile(&board, x);}
             if(t == 1){board.tiles[x] = board.tiles[x] == FLAG ? BLOCK : board.tiles[x] == BLOCK ? FLAG : board.tiles[x];}
         }
         if (t == 2){break;}
@@ -193,4 +195,9 @@ void draw_minesweeper(Minesweeper_Board board){
     printf("  +");
     for(int i = 0; i < board.width; i++){printf("-");}
     printf("+\n");
+}
+
+int open_tile(Minesweeper_Board *board, int tile){
+    if(bomb_in_array(board->bombs, tile, board->num_bombs)){return -1;}
+
 }
\ No newline at end of file
diff --git a/test/Minesweeper/test_bomb_in_array.c b/test/Minesweeper/test_bomb_in_array.c
index 710791b..2e97c56 100644
--- a/test/Minesweeper/test_bomb_in_array.c
+++ b/test/Minesweeper/test_bomb_in_array.c
@@ -22,4 +22,19 @@ void test_bomb_in_array(void){
     TEST_ASSERT_TRUE(result);//head collides with body
 }
 
+
+void test_bomb_not_in_array(void){
+    /* arrange */
+    bool result;
+    int array[] = {5, 9, 42, 6, 87, 95, 202, 13, 45 ,78};
+    int bomb = 0;
+    int length = 10;
+
+    /* act */
+    result = bomb_in_array(array, bomb, length);
+
+    /* assert */
+    TEST_ASSERT_FALSE(result);//head collides with body
+}
+
 #endif // TEST
\ No newline at end of file