[Event "Mahrisch"] [Site "Mahrisch"] [Round "0"] [White "Eliskases"] [Black "Grunfeld"] [Result "1-0"] [FEN "5nk1/1pr1qrnp/p2p1ppB/3Pp3/PP4PN/2P1P1R1/2Q4P/6RK w - - 0 1"] {A piece sacrifice to open the g-file} 1. Nf5 $1 {A suprising piece sacrifice whose main aim is to open the g-file for further tactical operations} 1... gxf5 (1... Nxf5 2. gxf5 g5 3. h4 $1 {opening the g-file}) 2. gxf5 Qe8 3. Qg2 Qd7 { It seems Black can give sufficient protection to the g7 square, but White will show otherwise} 4. Rxg7+ Rxg7 5. Bxg7 Qxg7 6. Qc2 $1 { This is the justification of the original Knight sacrifice on f5} 6... Ng6 7. fxg6 h6 8. Qf5 $18 1-0