Solution:
1. d4! exd3 e. p. 2. f3 g5
3. Ba7 gxf4 4. Bf2+ Kg5
5. Be1 Kg6 6. Bxb4 Kf7
7. Kxa3 Ke6 8. Bd2 wins
2. ... d2 3. Ba7 d1S
4. Ka1 g5 5. Bd4 Se3
6. Bxf6 Sc2+ 7. Ka2 Se1
8. Bxg5#
1. ... Kg4 2. d5 Kf3
3. d6 Kg2 4. d7 Kxh2
5. d8Q Kg2 6. Qd2 h2
7. f3+ Kg3 8. Qe1+ Kg2
9. Qe2+ Kg3 10. Qf1 exf3
11. Ba7 wins
