Black to Play
Published in Chess Puzzles
From a game, Ernst-Alterman, Manila, 1992
Solution:
1...Bf5+ 2.Ka1 [2.Rd3 Bxd3+ 3.Ka1 Qxa2+ 4.Kxa2 Ra8+ 5.Qa5 Rxa5#; 2.Nxf5 Bxc3] 2...Qxa2+ 3.Kxa2 Ra8+ 4.Qa5 Rxa5#
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