Double check
A double check is the most forcing move in chess. You make a double check by using a discovered check and also checking with the piece that you move. The only way out of a double check is to move the king, so often a double check is checkmate!
Black is expecting White to capture the bishop on d3. Can you find a stunning sacrifice that sets up a game-winning double check?
White sacrifices the queen to line the Black king up with White's bishop and rook. Can you find a forced checkmate in two moves?
White double checks Black's king, forcing it to h8. Bring home the win!
White's queen sacrifice and double check forced checkmate