diff --git a/Minesweeper/Core/Inc/spielfeld.h b/Minesweeper/Core/Inc/spielfeld.h
index d1fddc0..b7e403f 100644
--- a/Minesweeper/Core/Inc/spielfeld.h
+++ b/Minesweeper/Core/Inc/spielfeld.h
@@ -28,6 +28,7 @@ typedef struct {
 #define BOMB_CELL -1
 #define HIDDEN_CELL -2
 #define NUMBER_CELL -3
+#define FLAG_CELL -4
 
 int** generateGameBoard(int size);
 void placeBombs(int** gameBoard, int size, int numBombs);
diff --git a/Minesweeper/Core/Src/spielfeld.c b/Minesweeper/Core/Src/spielfeld.c
index 8e532b3..cb6c7e3 100644
--- a/Minesweeper/Core/Src/spielfeld.c
+++ b/Minesweeper/Core/Src/spielfeld.c
@@ -93,17 +93,17 @@ void displayGameBoardUART(int** gameBoard, int size) {
     for (int i = 0; i < size; i++) {
         offset += snprintf(buffer + offset, sizeof(buffer) - offset, "%2d ", i + 1); // Zeilennummer
         for (int j = 0; j < size; j++) {
-        	if (gameBoard[i][j] == '*') {
-				offset += snprintf(buffer + offset, sizeof(buffer) - offset, "* "); // Bombe
-			} else if (gameBoard[i][j] == '.') {
-				offset += snprintf(buffer + offset, sizeof(buffer) - offset, ". "); // Leerzelle
-			} else if (gameBoard[i][j] == '#') {
-				offset += snprintf(buffer + offset, sizeof(buffer) - offset, "# "); // Verdeckte Zelle
-			} else if (hiddengameBoard[i][j] == '?') {
-				offset += snprintf(buffer + offset, sizeof(buffer) - offset, "? "); // Fragezeichen (Flagge)
-			} else {
-				offset += snprintf(buffer + offset, sizeof(buffer) - offset, "%c ", gameBoard[i][j]); // Zahl
-			}
+            if (gameBoard[i][j] == BOMB_CELL) {
+                offset += snprintf(buffer + offset, sizeof(buffer) - offset, "* "); // Bombe
+            } else if (gameBoard[i][j] == EMPTY_CELL) {
+                offset += snprintf(buffer + offset, sizeof(buffer) - offset, ". "); // Leerzelle
+            } else if (gameBoard[i][j] == HIDDEN_CELL) {
+                offset += snprintf(buffer + offset, sizeof(buffer) - offset, "# "); // Verdeckte Zelle
+            } else if (gameBoard[i][j] == FLAG_CELL) {
+            	offset += snprintf(buffer + offset, sizeof(buffer) - offset, "? "); // Verdeckte Zelle
+            } else {
+                offset += snprintf(buffer + offset, sizeof(buffer) - offset, "%d ", gameBoard[i][j]); // Zahl
+            }
         }
         offset += snprintf(buffer + offset, sizeof(buffer) - offset, "\r\n");
     }
@@ -200,10 +200,10 @@ int** revealCell(int** gameBoard, int** hiddenGameBoard, int size, int row, int
 }
 
 void setFlag(int** hiddenGameBoard, int row, int col) {
-    if (hiddenGameBoard[row][col] = '?'){
-    	hiddenGameBoard[row][col] = '#';
+    if (hiddenGameBoard[row][col] = FLAG_CELL){
+    	hiddenGameBoard[row][col] = HIDDEN_CELL;
     }
     else{
-    	hiddenGameBoard[row][col] = '?';
+    	hiddenGameBoard[row][col] = FLAG_CELL;
     }
 }