标haichess.com

1. Qd5+ Kc3 2. Qe5+ Kd3 3. Qe1 Kc4 4. Qd2 Kb3 ... 12 moves

1. Qd5+ Kc3 2. Qe5+ Kd3 3. Qe1 Kc4 4. Qd2 Kb3 ... 12 moves

1. Qe5+ Kf2 2. Qd4+ Ke2 3. Qe4+ Kf2 4. Qd3 Ke1 ... 28 moves

1. Qg2+ Ka3 2. Qf3+ Kb2 3. Qe2+ Kb3 4. Qd3+ Kb2 ... 24 moves

1. Kd3 a1=Q 2. Qg2+ Ka3 3. Qa8+ Kb2 4. Qb7+ Ka3 ... 27 moves

1. Kc4 a1=Q 2. Qg2+ Kc1 3. Qf1+ Kb2 4. Qe2+ Kc1 ... 19 moves

1. Qb7+ Kc3 2. Qc6+ Kd4 3. Qa4+ Ke5 4. Qxa2 Kf4 ... 19 moves

1. Qe5+ Kf2 2. Qd4+ Ke2 3. Qe4+ Kf2 4. Qd3 Ke1 ... 28 moves

1. Kd2 a1=Q 2. Qb7+ Ka3 3. Qa6+ Kb4 4. Qxa1 Kb5 ... 22 moves

1. Kd3 a1=Q 2. Qg2+ Ka3 3. Qa8+ Kb2 4. Qb7+ Ka3 ... 24 moves

1. Kc4 a1=Q 2. Qg2+ Kc1 3. Qf1+ Kb2 4. Qe2+ Kc1 ... 23 moves

1. Qb7+ Kc3 2. Qb4+ Kc2 3. Qa4+ Kd3 4. Qxa2 Ke4 ... 18 moves