Event: Division 3

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Opponent Rating Result
William Sanders 1488 0 - 1
Ian P Blencowe 1615 0 - 1
TW Anthony Pilkington 1549 ½ - ½
Jaime Ashworth 1401 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1413 = (6053 + 400 * (1 - 2)) / 4)

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