Event: Lewisham Club Championship

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Opponent Rating Result
Ian F Mills 1474 ½ - ½
David Hamilton 1546 0 - 1
James R Barber 1312 1 - 0
Iain Hunt 1348 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1420 = (5680 + 400 * (1 - 1)) / 4)

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