[Event "Version of Kubble study"] [White "Benko/Kubbel,Pal/Leonid"] [Black "White to play and win"] [Site ""] [Round ""] [Annotator ""] [Result "1-0"] [Date "1922.??.??"] [PlyCount "11"] [Setup "1"] [FEN "K7/N7/7B/3k4/3p4/p7/2PP4/8 w - - 0 1"] {The solution is the same:} 1. Nc6 {But the knight sacrifice now has a surprising twist, since it uncovers the white king so that when the black pawn promotes it may do so with check.} ({Moving the white king and knight also adds a false try:} 1. c4+ $2 Kxc4 (1... dxc3 $2 2. dxc3 a2 (2... Kc4 3. Bc1 )3. c4+ $1 {wins.} )(1... Ke4 2. Nc6 a2 3. d3+ {[%cal Ge4f3,Ge4f5,Ge4d5,Ge4d3] wins, e.g.} Kxd3 4. Nb4+ )2. d3+ Kxd3 3. Nc6 Kc4 4. Bg7 d3 5. Ne5+ Kc3 {only leads to a draw.} )Kxc6 2. Bg7 Kd5 3. d3 a2 4. c4+ Kc5 5. Kb7 a1=Q 6. Bf8# 1-0