Event: Division 3

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Opponent Rating Result
Adrian Hall 1428 1 - 0
Craig Bradshaw 1535 0 - 1
Paul Watkinson 1200 1 - 0
Adrian Hall 1458 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1505 = (5621 + 400 * (2 - 1)) / 4)

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