| Opponent |
Rating |
Result |
| David R Jenkins |
0 |
1 - 0 |
| Ian M George |
0 |
0 - 1 |
| Christine F Constable |
0 |
1 - 0 |
| Ian Renshaw |
0 |
1 - 0 |
| Robin FG Kneebone |
0 |
0 - 1 |
| Ivan Gerasimenko |
0 |
0 - 1 |
| Hugh Brown |
0 |
1 - 0 |
performance = (sum(opponents ratings) + 400(wins-losses)) / games
57 = (0 + 400 * (4 - 3)) / 7)
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