标haichess.com

1. Bg7 Kf5 2. Bf8 Ba7 3. Ba3 Bd4 4. f8=Q+ Ke4 ... 19 moves

1. Ba7 Kb5 2. Bb8 Bg1 3. Bg3 Ba7 4. Bh2 Kc4 ... 25 moves

1. Ba6 Kd4 2. Kb2 Ke4 3. Kc3 Kf3 4. Bd3 Bd1 ... 10 moves

1. Bg7 Kf5 2. Bf8 Ba7 3. Bd6 Bd4 4. f8=Q+ Ke4 ... 22 moves

1. Kc2 Bg3 2. Kd3 Kf2 3. Ke4 Bh4 4. Bb4 Kf1 ... 5 moves

1. Kg7 Kd7 2. Kf6 Bb5 3. Bf7 Kd6 4. Bh5 Kd7 ... 28 moves

1. Bb5 Kg7 2. Be8 Bf3 3. Bg6 Kxg6 4. e8=Q+ Kf5 ... 25 moves

1. Ba4 Bf1 2. Bb3 Be2 3. Bc4 Kd1 4. Bb3+ Ke1 ... 13 moves

1. Ba4 Ba6 2. Kd4 Bf1 3. Ke4 Bg2+ 4. Kf4 Bd5 ... 12 moves

1. Bb5 Kg6 2. Be8+ Kf6 3. Ba4 Be6 4. Bc2 Ba2 ... 23 moves

1. Bg7 Kf5 2. Bf8 Ba7 3. Bd6 Bd4 4. f8=Q+ Ke4 ... 22 moves

1. Kc2 Kf1 2. Kd3 Bg3 3. Ke4 Kf2 4. Bb6+ Kg2 ... 7 moves