[Event "Olympiad"] [Site "masterchessopen.com – Warsaw (Poland)"] [Round "0"] [White "Staehelin Adolf (SUI)"] [Black "Rejfir Josef (CZE)"] [Result "1-0"] [ECO "D31"] [Opening "Semi-Slav: 4.Nf3"] 1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 Nf6 5.Bg5 h6 6.Bxf6 gxf6 7.e3 Nd7 8.cxd5 cxd5 9.Rc1 a6 10.Bd3 f5 11.Qe2 Bd6 12.O-O Rg8 13.Kh1 b5 14.Rg1 Bb7 15.Nd2 Bxh2 {#r} 1-0