Participant of

12th Hoogoven tournament, Beverwijk
Easter tournament, Brussels
Belgium vs. Netherlands, Antwerp
World chess tournament, Amsterdam
13th Hoogoven tournament, Beverwijk
14th Hoogoven tournament, Beverwijk
15th Hoogoven tournament, Beverwijk
1st Clare Benedict cup, Mont Pèlerin
International rapid tournament, Leiden
Christmas tournament, Saarbrücken
2nd Stevenson memorial, Bognor Regis
Zonal tournament, Munich
Open Dutch rapid championship, Zevenbergen
3rd An Tóstal tournament, Dublin
6th international tournament, Ostend
International tournament, Gijón
19th Hoogoven tournament, Beverwijk
20th Hoogoven tournament, Beverwijk
13th olimpiad, Munich
21st Hoogoven tournament, Beverwijk
Zonal tournament, Madrid
8th international tournament, Eastbourne
PAM tournament, Utrecht
24th Hoogoven tournament, Beverwijk
2nd IBM tournament, Amsterdam
25th Hoogoven tournament, Beverwijk
26th Hoogoven tournament, Beverwijk
3rd Capablanca memorial, Havana
4th Capablanca memorial, Havana
Zonal tournament, The Hague
5th Capablanca memorial, Havana
International tournament, Palma de Mallorca
Anderssen memorial, Büsum
International tournament, Solingen
6th Capablanca memorial, Havana
18th olimpiad, Lugano
7th Capablanca memorial, Havana
International tournament, San Juan
4th BBC master game, Bristol
Zonal tournament, Marbella
OHRA grandmaster tournament, Amsterdam