Event: Hamilton Cup

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Opponent Rating Result
Peter Dickinson 1560 ½ - ½
Martyn Hamer 2108 0 - 1
Gordon L Glover 1539 1 - 0
Andrew Hargreaves 1808 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1654 = (7015 + 400 * (1 - 2)) / 4)

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