[rules] added a try except

src/rules.py

@@ -12,12 +12,12 @@ class Rules:
 	Output:
 		correct -> Bool: if True, the board size is correct
 	"""
-		correct = True
-
-		if not self.nb_col == board.nb_col:
 		correct = False
 
-		if not self.nb_row == board.nb_row:
-			correct = False
+		try:
+			if self.nb_col == board.nb_col and self.nb_row == board.nb_row :
+				correct = True
+		except Exception:
+			print("Exception: check_board_size: col and row parameters might are compared to another type")
 
 		return correct