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 |
Willem F Wertheim Opening Repertoire with White pieces
| ECO | Opening | Games |
| C02 | French, advance variation | 1 games |
| D51 | Queen's Gambit Declined, 4.Bg5 Nbd7 | 1 games |
| B84 | Sicilian, Scheveningen (Paulsen), classical variation | 1 games |
| A18 | English, Mikenas-Carls variation | 1 games |
Willem F Wertheim Opening Repertoire with Black pieces
| ECO | Opening | Games |
| D51 | Queen's Gambit Declined, 4.Bg5 Nbd7 | 2 games |
| C98 | Ruy Lopez, closed, Chigorin, 12...Nc6 | 1 games |
| D45 | Queen's Gambit Declined semi-Slav, 5.e3 | 1 games |
| A29 | English, four knights, kingside fianchetto | 1 games |
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