Marten Holwerda
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Groningen Harmonie op-A | 12/23/2005 | 1471 |  Netherlands |
Most Played Openings as White
| ECO | Opening | Games |
| A38 | English, symmetrical variation | 1 games |
| E62 | King's Indian, fianchetto variation | 1 games |
| D41 | Queen's Gambit Declined, Semi-Tarrasch, 5.cd | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B59 | Sicilian, Boleslavsky variation, 7.Nb3 | 1 games |
| B21 | Sicilian, Grand Prix attack | 1 games |
| B66 | Sicilian, Richter-Rauzer, Rauzer attack, 7...a6 | 1 games |
