There is nothing quite like your opponent threatening to mate you to get your own attacking juices flowing. Here, Duras, at Carlsbad in 1911, is being threatened with a mate in one by E. Cohn.
This is also a practical example of how simply threatening to win a lot of material is faster than a forced mate: 1. Rxh7+ Kxh7 2. Qe7+ Kg6 3. Rg8+ Kf5 4. Rxg5+ and now Cohn resigned because he sees he loses the queen by means of the x-ray check at d7 after he plays pawn takes rook. There is a longer forced mate: 4. Qc5+ Ke6 5. Qc8+ Ke5 6. Re8+ Kd5 7. Rd8+ Ke5 8. Qc5+ Ke6 9. Qc4+ Kf5 10. Qd3+ Ne4 11. Qxe4+ Kg5 12.Rg8+ Kh6 13. Qg6#, Duras had more time to get a bite to eat.