- 1. Ra5+ Kb6 2. Qxb4+ Kc6 3. Qb5#
Other defences
- 1. Ra5+ Kxa5 2. Qxb4+ Ka6 3. Qb5#
Position
- White
- king on a2, queen on b1, rooks on a1 and c5, knight on h4, pawns on a3, a4, d3 and g2
- Black
- king on a6, queen on a7, rooks on b8 and c3, knights on d7 and d8, pawns on b4, b7, c4, c7, d4 and d6