[Event "Ch Czechoslovakia (Army)"] [Site "masterchessopen.com Prague (Czech Republic)"] [Date "1955.08.07"] [Round "1"] [White "Kos Igor"] [Black "Muehl"] [Result "1-0"] [ECO "E21"] [Opening "Nimzo-Indian: Three Knights"] 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Nf3 c6 5.Qc2 d5 6.e3 O-O 7.Bd3 h6 8.O-O dxc4 9.Bxc4 Nd5 10.a3 Be7 11.e4 Nxc3 12.bxc3 b5 13.Ba2 Bb7 14.Bb1 f5 15.Ba2 Kh8 16.Bxe6 fxe4 17.Ne5 Rf6 18.Qxe4 Qe8 19.Ba2 Na6 20.Bb1 {#r} 1-0