| Opponent |
Rating |
Result |
| E Gordon Marks |
136 |
0 - 1 |
| Chris J Terrington |
126 |
0 - 1 |
| Richard Hersey |
132 |
1 - 0 |
| John K Holliday |
139 |
0 - 1 |
| Harry Edwards |
137 |
1 - 0 |
| Adam Routledge |
150 |
½ - ½ |
performance = (sum(opponents ratings) + 400(wins-losses)) / games
70 = (820 + 400 * (2 - 3)) / 6)
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