"This tournament was organised to celebrate the 75th anniversary of the Utrecht chess club and was sponsored by oil company PAM. It took place in the dining hall of the Steenkolen-Handelsvereeniging NV in Utrecht. Orbaan led the tournament. O'Kelly, together with Euwe and Spanjaard, formed the appeals commission. The prizes were as follows: 1st prize, f. 500; 2nd prize, f. 400; 3rd prize, f. 300; 4th prize, f. 200; 5th prize, f. 100. The IM norm was 4 points, the GM norm was 6 for masters, 5½ for non-masters. So there was one IM norm for Langeweg. Strangely, chessbase and other sources give many more moves in Bisguier-Pérez, finishing with a black victory. However, the tournament bulletin mentions that white offered a draw after black's 13th move and that black accepted despite his superior position." (Nikolaas Verhulst, Belgian Chess History)
Utrecht, the Netherlands, 7-17 December 1961
Age 1 2 3 4 5 6 7 8 9 0
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1 O'Kelly 50 ● ½ 1 ½ ½ ½ 1 1 ½ 1 6½
2 Robatsch 33 ½ ● ½ ½ ½ 1 ½ 1 ½ 1 6
=3 Matanovic 31 0 ½ ● ½ ½ ½ ½ 1 1 1 5½
=3 Bisguier 32 ½ ½ ½ ● 1 ½ 1 ½ 0 1 5½
5 Langeweg 24 ½ ½ ½ 0 ● ½ ½ 1 1 ½ 5
6 Donner 34 ½ 0 ½ ½ ½ ● ½ ½ ½ 1 4½
7 Bouwmeester 32 0 ½ ½ 0 ½ ½ ● ½ 1 ½ 4
=8 Pérez 41 0 0 0 ½ 0 ½ ½ ● ½ 1 3
=8 Van Geet 29 ½ ½ 0 1 0 ½ 0 ½ ● 0 3
10 Van de Pol -- 0 0 0 0 ½ 0 ½ 0 1 ● 2
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Nine rounds in 11 days, starting on Thursday 7 December (45 games). Rest days 11 & 15 December. O'Kelly won with 6.5/9.Photo (O'Kelly vs van de Pol): https://timelessmoon.getarchive.net...
Sources
Dutchbase (https://maxeuwe.nl/files-dutchbase/...)
Belgian Chess History (https://www.belgianchesshistory.be/...)
Het PAM-toernooi (1961) by Johan Hut (2012) (https://web.archive.org/web/2013082...)
Dutch newspapers (available at https://www.delpher.nl/nl/kranten)
Kibitzing
