KNSB training tournament, Amsterdam
08-10-1951 > 13-10-1951
|1||IM||O’Kelly de Galway, Albéric||BEL||–||½½||11||11||5|
|2||Barendregt, Johan Teunis||NED||½½||–||0½||11||3½|
 gives full results and a few games. Due to some of O’Kelly’s games being adjourned, Barendregt led at the start of the tournament, but he fell back in the last rounds. Note that  gives Geus’ first name as Klaas instead of William. This is contradicted by , which mentions several times that Geus was Dutch junior champion – Klaas Geus was already active in the early 20th century.
- 2 games.
- G. Di Felice, Chess results 1951-1955, McFarland 2010
- De Telegraaf 29/08-13/10/1951