Event: Durham League Division B

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Opponent Rating Result
Carl Stephens 1598 0 - 1
Geoffrey Howsden 1399 0 - 1
Sebastian Palucha 1317 0 - 1
Mark Edmundson 1306 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1105 = (5620 + 400 * (0 - 3)) / 4)

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