Event: Lewisham Club Championship

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Opponent Rating Result
Mark M Robertson 2082 0 - 1
Matthew Helsby 1209 1 - 0
Iain Hunt 1348 ½ - ½
Conrad Hall 1564 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1451 = (6203 + 400 * (1 - 2)) / 4)

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