[Event "Ch Germany (seniors)"] [Site "masterchessopen.com - Halle (Germany)"] [Date "2011.08.12"] [Round "8"] [White "Knaak Joachim (GER)"] [Black "Welz Peter Dr (GER)"] [Result "0-1"] [WhiteElo "2233"] [BlackElo "2133"] [ECO "A81"] [Opening "Dutch: 2.g3 Nf6 3.Bg2 g6 4.Nf3"] 1.d4 f5 2.g3 Nf6 3.Bg2 g6 4.Nf3 Bg7 5.O-O O-O 6.c4 d6 7.Nc3 Nc6 8.d5 Ne5 9.Nxe5 dxe5 10.Qb3 h6 11.c5 Kh8 12.Rd1 g5 13.Bd2 e4 14.Rac1 a6 15.Be1 Qe8 16.a4 Qh5 17.Qc4 Ng4 18.h3 Ne5 19.Qb3 f4 20.Nxe4 Bxh3 21.f3 Bxg2 22.Kxg2 g4 23.gxf4 Qh3+ 24.Kg1 gxf3 25.exf3 Nxf3+ 26.Kf2 Rxf4 27.Qe3 Qh2+ 28.Kf1 Nd2# 0-1