→ Qe7 is a checkmate. However, there is another way to checkmate the black king as well. What is it?
→ You already know that moving Queen to f7 is a stalemate (draw). What is the other move here that leads to a stalemate?
→ Exercise 1. White to play and checkmate the black king in one move.
→ Exercise 2. Black to play and checkmate white king in one move.
→ Exercise 3. White to move. After Qxc7, is it Checkmate or Stalemate?