Event: Lewisham Club Championship 2023

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Opponent Rating Result
David C Helsby 0 1 - 0
Adam Sixsmith 1702 0 - 1
Iain Hunt 1424 ½ - ½
Matthew Helsby 1314 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1010 = (4440 + 400 * (1 - 2)) / 4)

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