Jan Willem Koelmans's chess openings
🇳🇱 NetherlandsFIDE 185019 games
Jan Willem Koelmans, from Netherlands, has 19 tournament games in the ChessPrep database. As White, Jan Willem Koelmans most often opens with 1.d4 (100% of games). As Black, against 1.e4 the usual reply is 1...c5, the Sicilian Defense; against 1.d4 it is 1...d5.
As White9 games · +2 =4 −3 · 44%
As Black10 games · +0 =1 −9 · 5%
As White
- 1.d4 Queen's Pawn Opening100%9 games · scores 44% · main line 1.d4 Nf6 2.c4 c5 3.d5 b5
As Black against 1.e4
- 1...c5 Sicilian Defense100%5 games · scores 10% · main line 1.e4 c5 2.Nf3 d6 3.d4 cxd4
As Black against 1.d4
- 1...d5 Closed Game100%4 games · scores 0% · main line 1.d4 d5 2.c4 c6 3.Nc3 Nf6
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