Willem F Wertheim
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Jakarta sim | ??/??/1933 | 0 |  Indonesia |
| The Hague ol (Men) | 07/23/1928 | 0 |  Netherlands |
Most Played Openings as White
| ECO | Opening | Games |
| C46 | Three knights game | 1 games |
| A20 | English opening | 1 games |
| D65 | Queen's Gambit Declined, Orthodox defence, Rubinstein attack, main line | 1 games |
| A18 | English, Mikenas-Carls variation | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| D51 | Queen's Gambit Declined, 4.Bg5 Nbd7 | 2 games |
| B50 | Sicilian | 1 games |
| D31 | Queen's Gambit Declined, 3.Nc3 | 1 games |
| C01 | French, exchange variation | 1 games |
