Event: Division 2

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Opponent Rating Result
Kevin J Spillane 1690 1 - 0
Shane Cooksey 1495 0 - 1
Ray Sawyer 1563 ½ - ½
Steven Walker 1275 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1506 = (6023 + 400 * (1 - 1)) / 4)

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