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Tournaments played by Duncan Sommerville |
| Date | Name | Old rating | Current rating |
|---|---|---|---|
| 2007-10-28 | Halloween Tournament | 860 | 847 |
| 2007-08-24 | Toronto Chess Day Camp | 857 | 860 |
| 2007-08-24 | Toronto Chess Day Camp | 743 | 857 |
| 2007-08-24 | Toronto Chess Day Camp | 721 | 743 |
| 2007-08-24 | Toronto Chess Day Camp | 794 | 721 |
| 2007-07-20 | Chess Camp | 820 | 794 |
| 2007-07-20 | Chess Camp | 734 | 820 |
| 2007-07-20 | Chess Camp | 730 | 734 |
| 2007-07-20 | Chess Camp | 790 | 730 |
| 2007-07-20 | Chess Camp | 774 | 790 |
| 2007-07-20 | Chess Camp | 704 | 774 |
| 2007-07-20 | Chess Camp | 718 | 704 |
| 2006-08-29 | Toronto Chess Camp | 736 | 718 |
| 2006-07-30 | Toronto Superfest Warm-Up | 765 | 736 |
| 2006-07-22 | Summer Chess Club | 695 | 765 |
| 2006-07-21 | Toronto Chess Day Camp | 732 | 695 |
| 2006-07-21 | Toronto Chess Day Camp | 748 | 732 |
| 2006-07-21 | Toronto Chess Day Camp | 777 | 748 |
| 2006-06-03 | HS-Secondaire Quebec-Ontario Team Match | 806 | 777 |
| 2006-03-03 | Toronto Team (7-9) | 776 | 806 |
| 2005-12-12 | St. Andrew's JHS | 0 | 776 |