WD | Black to play and win

Black to play and win (hard)

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1...Nh4+ 2.Kg3 { 2.Kg1 Qd5! 3.Qxd5 exd5 and White‘s N is trapped; 2.Kf1 Qd7! 3.Be1 h6 4.Qxb7 Qb5+ 5.Qxb5+ axb5 and again the N is lost } 2...Nh5+‼ 3.Kxh4 h6 4.f4 hxg5+ 5.fxg5 Qxg5+‼ 6.Kxg5 f6+ 7.Kg6 Rh6# 0-1

[Event "?"]
[Site "Leningrad"]
[Date "??.??.1973"]
[Round "?"]
[White "Vladimirov"]
[Black "Vorotnikov"]
[Result "0-1"]
[FEN "r2qk2r/1pp2ppp/p3pnn1/6N1/1B1P2P1/1Q2P2P/PP3PK1/R6R b kq - 0 1"]
[SetUp "1"]

1...Nh4+ 2.Kg3 { 2.Kg1 Qd5! 3.Qxd5 exd5 and White‘s N is trapped; 2.Kf1 Qd7! 3.Be1 h6 4.Qxb7 Qb5+ 5.Qxb5+ axb5 and again the N is lost }  2...Nh5+ $3 3.Kxh4 h6 4.f4 hxg5+ 5.fxg5 Qxg5+ $3 6.Kxg5 f6+ 7.Kg6 Rh6# 0-1