[Event "Ch Rheinhessen (open)"] [Site "masterchessopen.com Wallertheim (Germany)"] [Round "0"] [White "Koellmer Hans-Peter"] [Black "Koch Hans Georg"] [Result "1-0"] [ECO "C55"] [Opening "Two Knights: 4.d4 exd4"] 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d4 exd4 5.e5 Ne4 6.Bd5 Nc5 7.O-O d6 8.Re1 dxe5 9.Bxc6+ bxc6 10.Nxe5 Be7 11.Nxc6 Qd6 12.Nxe7 Be6 13.Nf5 {#r} 1-0