Participant of

50 years NSB jubilee tournament, Scheveningen
4th christmas congress, Hastings
Match Euwe vs. Colle, Zutphen
Belgium vs. The Netherlands, Brussels
Olympic tournament, Paris
Match Rotterdam vs. Antwerp, Antwerp
Easter tournament, Weston-super-Mare
ASC four masters tournament, Amsterdam
3rd match Belgium vs. The Netherlands, Brussels
1st olimpiad, London
4th match The Netherlands vs. Belgium, The Hague
2nd match Colle vs. Euwe, Amsterdam
3rd match Euwe vs. Colle, Amsterdam
International tournament, Carlsbad
11th Christmas Congress, Hastings
Belgium vs. Netherlands, Brussels
20th Christmas congress, Hastings
Sunday chronicle tournament, London
International tournament, Maastricht
Zaanstreek international, Zaandam/Wormerveer
Netherlands vs. Belgium, Breda
Staunton world chess tournament, Groningen
HSG jubilee tournament, Hilversum
12th Hoogoven tournament, Beverwijk
Belgium vs. Netherlands, Antwerp
9th olimpiad, Dubrovnik
World chess tournament, Amsterdam
Wertheim memorial, New York
14th Hoogoven tournament, Beverwijk
VAS Amsterdam vs. Colle Brussels, Amsterdam
15th Hoogoven tournament, Beverwijk
1st Clare Benedict cup, Mont Pèlerin
2nd Clare Benedict cup, Mont Pèlerin
20th Hoogoven tournament, Beverwijk