[ oplossingen onderaan – solutions below ]
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puzzle 1 : Black to move
…Rh5+ {double check!} Kg1 {only move} Bc5+ Kf1 Rh1#
puzzle 2 : Black to move
…Nd7 {and Black will win a piece on the next turn}
puzzle 3 : White to move
Bf7+ followed by Qxd7+ Kxd7 Bxg6! and White can make the h-pawn promote and thus wins.