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1. Qg2+ Kd3 2. Qf3+ Kd2 3. Qf2+ Kc3 4. Qe3+ Kb2 ... 9 moves

1. Qd5+ Kc3 2. Qc5+ Kb2 3. Qb4+ Ka2 4. Qc3 Kb1 ... 8 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