Pieter Claesen
Pieter Claesen Repertoire with White pieces
| ECO | Opening | Games |
| A28 | English, four knights system | 15 games |
| A36 | English, symmetrical variation | 15 games |
| A21 | English opening | 12 games |
| A26 | English, closed system | 9 games |
Pieter Claesen Repertoire with Black pieces
| ECO | Opening | Games |
| A57 | Benko gambit | 16 games |
| C02 | French, advance variation | 12 games |
| C06 | French, Tarrasch, closed variation, main line | 11 games |
| C01 | French, exchange variation | 10 games |
BELGIUM

