Event: 6600 max

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Opponent Rating Result
Donald Billows 1270 1 - 0
Derek Green 1555 0 - 1
Donald Billows 1270 ½ - ½
Derek Green 1555 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1313 = (5650 + 400 * (1 - 2)) / 4)

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