William Mark Duckworth
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| 25th Metropolitan IM | 03/20/2013 | 2310 | United States |
| 22nd Metropolitan IM | 10/10/2012 | 2276 | United States |
| 18th Metropolitan IM | 04/11/2012 | 2298 | United States |
| 15th Metropolitan IM | 01/25/2012 | 2293 | United States |
Most Played Openings as White
| ECO | Opening | Games |
| D01 | Richter-Veresov attack | 7 games |
| A45 | Queen's pawn game | 7 games |
| B07 | Pirc defence | 2 games |
| E77 | King's Indian, Four pawns attack, 6.Be2 | 2 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C16 | French, Winawer, advance variation | 5 games |
| A56 | Benoni defence | 4 games |
| B01 | Scandinavian (centre counter) defence | 3 games |
| A44 | Old Benoni defence | 3 games |
United States
FIDE ID:

