1.Ba5!

Thematic try 1.d6? Rc2+ 2.Bc7 (2.Kd7 Kb7 3.Ke6 Rxd2 4.d7 Kc6 –+) 2...Nxd2 zz 3.d7 Nc4 zz 4.d8Q (4.Kd8 Kb7 –+) 4...Nb6#

1...Rc2+

 1...Nxd2 2.d6 Nc4 3.d7 Rb8+ 4.Kc7 Rb7+ 5.Kc8 Nd6+ 6.Kd8 Nf7+ 7.Ke8 =; 1...Ra2 2.d6 Rxa5 3.d7 Rc5+ 4.Kd8 Kb7 5.Ke7 Re5+ 6.Kd6 =

2.Bc7 zz Nxd2 3.d6 zz Nc4

3...Ne4 4.d7 Nd6+ 5.Kd8 Nb7+ 6.Kc8 =

4.d7 zz Nb6+

4...Rc3 5.Kd8 Kb7 6.Bf4 =;

4...Rc1 5.Kd8 Kb7 6.Bg3 = 5

.Kd8 Kb7 6.Bxb6 Kxb6 7.Ke7 (Ke8) Re2+ 8.Kd8 Kc6

8...Kb7 stalemate

9.Kc8 Ra2 10.d8N+ =