1.Kb8
A. 1...Nc7 2.a8N!! (Thematic try: 2.a8Q? Kd8! (2...Nxa8? 3.Bxa8+-) 3.Bc6 (3.Qa7?? Nd7#) 3...Nxa8 4.Bxa8 (4.Kxa8 Kc7=) 4...Nd7+ 5.Kb7! Ba4 6.b5! (6.a7 Bb5 stalemate) 6...Bxb5 7.a7 virtual stalemate 7...Bc4! 8.Kc6 Bd5+! 9.Kxd5 Nb6+ 10.Kc6 Nxa8 11.Kb7 Kd7!=) 2...Kd8 3.Nb6! (3.Nxc7? Nd7+ 4.Ka7 Kxc7=) 3...Nxa6+ 4.Bxa6+-
B. 1...Kd6 2.Kc8! (Thematic try: 2.a8Q? Nd7+ 3.Ka7 (3.Kc8 Nb6+ 4.Kd8 Nxa8 5.Bxa8 Nc7 6.Bb7 Ba4=) 3...Nc7 4.Qh8 Nb5+ 5.Ka8 Nc7+ 6.Ka7 Nb5+ perpetual check) 2...Nd7 3.Bc6! Nb6+ 4.Kb7+-
C. 1...Kd8! 2.Bc6! Nc7 3.Kb7! Bb3 4.Kb6 Bd5 [4...Nd7+ 5.Ka5 Ne5 6.a8Q+ Nxa8 7.Bxa8 Nc4+ 8.Kb5 Kc7 9.a7 Nd6+ 10.Ka6 Bc4+ 11.b5 Bxb5+ 12.Ka5+-] 5.Bb7! [5.Bxd5? Nxd5+ 6.Ka5 Nc7 7.b5 Nd7 8.b6 Nxb6=] 5...Nd7+ 6.Ka5 Nf6 7.b5 Na8 8.b6+-
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