Pieter Claesen vs Muhamed Arbouche
37th Chess Olympiad Turin ITA round 13 2006.06.04
English Opening: Symmetrical Variation, Botvinnik System 1/2-1/2

Alexei Dmitriyevich Fedorov vs Pieter Claesen
European Team Championship Hersonissos GRE round 1.16 2017.10.28
French Defense 1-0

Pieter Claesen vs Veselin Topalov
EU-ch U20 Arnhem NED round 1 1989.12.19
English Opening: King’s English Variation, Three Knights System 1/2-1/2