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Tournaments played by Jeffrey Lee |
| Date | Name | Old rating | Current rating |
|---|---|---|---|
| 2013-04-12 | TSSCL Individual Championship 2013 | 1306 | 1331 |
| 2012-06-09 | 2012 Team Championship Ontario-Quebec | 1258 | 1306 |
| 2012-05-27 | Ontario High School Chess Championship 2012 | 1264 | 1258 |
| 2012-04-20 | TSSCL Team Championship 2012 | 1265 | 1264 |
| 2012-03-31 | Ontario Teams Chess Championship | 1238 | 1265 |
| 2012-03-30 | 2012 TSSCL Individual Championship | 1241 | 1238 |
| 2011-07-07 | Canadian Youth Chess Championships - 2011 | 1231 | 1241 |
| 2011-06-11 | Championnat échiquéen par équipe Ontario-Quebec Team Chess Championship | 1213 | 1231 |
| 2011-05-15 | Ontario High School Chess Championship | 1197 | 1213 |
| 2011-05-01 | Grand Prix #3 | 1211 | 1197 |
| 2011-04-03 | 2011 ACC Qualifier | 1248 | 1211 |
| 2011-03-13 | Toronto Youth Championship | 1253 | 1248 |
| 2011-03-05 | Ontario Teams Chess Championship K-3, K-9, K-12 | 1241 | 1253 |
| 2011-02-06 | Grand Prix II | 1239 | 1241 |
| 2010-11-07 | Grand Prix I | 1149 | 1239 |
| 2010-09-12 | The Knights of Chess Open Championship | 1140 | 1149 |
| 2010-05-24 | 64th Ontario Open Championship - Under 1600 | 1163 | 1140 |
| 2010-05-02 | Scholastic Grand Prix 2009-2010 (3 of 3) | 1069 | 1163 |
| 2010-04-18 | 2010 Ontario Chess Challenge | 1069 | 1069 |
| 2010-03-27 | York Region Chess Challenge | 1071 | 1069 |
| 2010-03-07 | Ontario Team Chess Championship | 955 | 1071 |
| 2010-01-31 | Scholastic Grand Prix 2009-2010 (2 of 3) | 961 | 955 |
| 2009-09-04 | Camp | 960 | 961 |
| 2009-09-04 | Camp | 953 | 960 |
| 2009-09-04 | Camp | 946 | 953 |
| 2009-09-04 | Camp | 972 | 946 |
| 2009-08-28 | Camp | 1024 | 972 |
| 2009-08-28 | Camp | 1012 | 1024 |
| 2009-08-28 | Camp | 993 | 1012 |
| 2009-08-28 | Camp | 979 | 993 |
| 2009-08-28 | Camp | 962 | 979 |
| 2009-08-14 | Camp | 918 | 962 |
| 2009-08-14 | Camp | 864 | 918 |
| 2009-08-14 | Camp | 868 | 864 |
| 2009-08-14 | Camp | 863 | 868 |
| 2009-08-14 | Camp | 803 | 863 |
| 2009-04-26 | Ontario Chess Challenge | 811 | 803 |
| 2009-04-19 | regular | 800 | 811 |
| 2009-04-12 | regular | 732 | 800 |
| 2009-04-05 | regular | 740 | 732 |
| 2009-03-28 | York Region Chess Challenge | 0 | 740 |