White to play and win (hard)
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Show moves
1.Rff4‼ h5 ( 1...exf4 2.Rh5# ) 2.g3 Kh6 3.Rxh5+ Kg7 4.Rg4+ Kf8 5.Rh8# 1-0
Games PGN
Created 6 days ago. 
[Event "Lone Pine"]
[Site "?"]
[Date "1979.??.??"]
[Round "?"]
[White "Larsen"]
[Black "Strauss"]
[Result "1-0"]
[FEN "8/1p2bp1p/p1bp1p2/4pPk1/P1r1P2R/2P2R1P/2P3P1/3B3K w - - 0 1"]
[SetUp "1"]

1.Rff4 $3 h5 ( 1...exf4 2.Rh5# ) 2.g3 Kh6 3.Rxh5+ Kg7 4.Rg4+ Kf8 5.Rh8# 1-0