[White "   ANDRUET - SPASSKY, Bundesliga, 1988   "]   [Black "Black to play and win"]   [Result "0-1"]   [FEN "4r1k1/3b1p2/5qp1/1BPpn2p/7n/r3P1N1/2Q1RPPP/1R3NK1 b - - 0 1"]   {The above problem is actually mate in four, starting with:}   1... Qf3!!   {The threat is Qxg2, so White has no choice:}   2 gxf3 Nexf3+ 3 Kh1 Bh3!   {and 4... Bg2  with mate is unavoidable. Quite brilliant.}