Otto B Morcken
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Moscow ol (Men) fin-B | 09/02/1956 | 0 | |
| Moscow ol (Men) prel | 09/02/1956 | 0 | |
| Amsterdam ol (Men) fin-B | 09/??/1954 | 0 | Netherlands |
| Amsterdam ol (Men) pre-III | 09/??/1954 | 124 | Netherlands |
Most Played Openings as White
| ECO | Opening | Games |
| E68 | King's Indian, fianchetto, classical variation, 8.e4 | 3 games |
| A39 | English, symmetrical, main line with d4 | 2 games |
| D74 | Neo-Gruenfeld, 6.cd Nxd5, 7.O-O | 1 games |
| E11 | Bogo-Indian defence | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| D00 | Queen's pawn game | 2 games |
| D61 | Queen's Gambit Declined, Orthodox defence, Rubinstein variation | 2 games |
| A18 | English, Mikenas-Carls variation | 1 games |
| D35 | Queen's Gambit Declined, 3...Nf6 | 1 games |


Netherlands