[Event "NED-ch prelim I"] [Site "Leiden NED"] [Date "1946.11.02"] [EventDate "1946.10.??"] [Round "7"] [Result "1-0"] [White "Carel Benjamin van den Berg"] [Black "Willem Wolthuis"] [ECO "D49"] [WhiteElo "?"] [BlackElo "?"] [PlyCount "61"] 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e3 Nf6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5 cxd4 11.Nxb5 Ng4 12.Nd6+ Bxd6 13.exd6 e5 14.O-O Bb7 15.Nxd4 Qh4 16.h3 Nxf2 17.Nf5 Nxh3+ 18.gxh3 Qxh3 19.Qe2 g6 20.Be4 Bxe4 21.Qxe4 O-O 22.Nh6+ Kg7 23.Qg4 Qxg4+ 24.Nxg4 Rfb8 25.Bh6+ Kg8 26.Rac1 Ra7 27.Rc7 Rxc7 28.dxc7 Rc8 29.Rd1 Rxc7 30.Rxd7 Rxd7 31.Nf6+ 1-0