
Black to play
The solution is: 1… f4 2. exf4 Rxd4 3. Qxg6+ Qxg6 4. Rxg6 Rxd2+ 5. Kf1 Nxf4 6. Rg7+ Kh8 7. R7g6 Rd1+ 8. Kf2 Nxh3+ 9. Kf3 Nxg1+ 10. Kg3 Rd3+ 11. Kf2 Re2+ 12. Kxg1 Rd1# 0-1

Black to play
The solution is: 1… f4 2. exf4 Rxd4 3. Qxg6+ Qxg6 4. Rxg6 Rxd2+ 5. Kf1 Nxf4 6. Rg7+ Kh8 7. R7g6 Rd1+ 8. Kf2 Nxh3+ 9. Kf3 Nxg1+ 10. Kg3 Rd3+ 11. Kf2 Re2+ 12. Kxg1 Rd1# 0-1