Queen, rook and two knights

• 1. Qxa6 Re5+ 2. Nxe5 Nc4 3. Qb7#

Other defences

• 1. Qxa6 Rh8 2. Qb7#
• 1. Qxa6 Rh7 2. Qb7#
• 1. Qxa6 Rh6 2. Qb7#
• 1. Qxa6 Rg5 2. Qb7#
• 1. Qxa6 Rf5 2. Qb7#
• 1. Qxa6 Re5+ 2. Nxe5 Na4 3. Qb7#
• 1. Qxa6 Re5+ 2. Nxe5 Nd3 3. Qb7#
• 1. Qxa6 Re5+ 2. Nxe5 Nd1 3. Qb7#
• 1. Qxa6 Re5+ 2. Nxe5 Qxf4 3. Qb7#
• 1. Qxa6 Re5+ 2. Nxe5 Qc4 3. Qb7#
• 1. Qxa6 Re5+ 2. Nxe5 Qe3 3. Qb7#
• 1. Qxa6 Re5+ 2. Nxe5 Qc3 3. Qb7#
• 1. Qxa6 Re5+ 2. Nxe5 Qd2 3. Qb7#
• 1. Qxa6 Re5+ 2. Nxe5 Qc2 3. Qb7#
• 1. Qxa6 Re5+ 2. Nxe5 Qh1 3. Qb7#
• 1. Qxa6 Re5+ 2. Nxe5 Qg1 3. Qb7#
• 1. Qxa6 Re5+ 2. Nxe5 Qf1 3. Qb7#
• 1. Qxa6 Re5+ 2. Nxe5 Qe1 3. Qb7#
• 1. Qxa6 Re5+ 2. Nxe5 Qd1 3. Qb7#
• 1. Qxa6 Re5+ 2. Nxe5 Qb1 3. Qb7#
• 1. Qxa6 Re5+ 2. Nxe5 Qa1 3. Qb7#
• 1. Qxa6 Re5+ 2. Nxe5 dxe4 3. Qb7#
• 1. Qxa6 Re5+ 2. Nxe5 d6 3. Qb7#
• 1. Qxa6 Re5+ 2. Nxe5 d4 3. Qb7#
• 1. Qxa6 Re5+ 2. Nxe5 c4 3. Qb7#
• 1. Qxa6 Rh4 2. Qb7#
• 1. Qxa6 Rh3 2. Qb7#
• 1. Qxa6 Rh2 2. Qb7#
• 1. Qxa6 Rh1 2. Qb7#
• 1. Qxa6 Nc4 2. Qb7#
• 1. Qxa6 Na4 2. Qb7#
• 1. Qxa6 Nd3 2. Qb7#
• 1. Qxa6 Nd1 2. Qb7#
• 1. Qxa6 Qxf4 2. Qb7#
• 1. Qxa6 Qc4 2. Qb7#
• 1. Qxa6 Qe3 2. Qb7#
• 1. Qxa6 Qc3 2. Qb7#
• 1. Qxa6 Qd2 2. Qb7#
• 1. Qxa6 Qc2 2. Qb7#
• 1. Qxa6 Qh1 2. Qb7#
• 1. Qxa6 Qg1 2. Qb7#
• 1. Qxa6 Qf1 2. Qb7#
• 1. Qxa6 Qe1 2. Qb7#
• 1. Qxa6 Qd1 2. Qb7#
• 1. Qxa6 Qb1 2. Qb7#
• 1. Qxa6 Qa1 2. Qb7#
• 1. Qxa6 dxe4 2. Qb7#
• 1. Qxa6 d6 2. Qb7#
• 1. Qxa6 d4 2. Qb7#
• 1. Qxa6 c4 2. Qb7#