Event: Division B

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Opponent Rating Result
William T Jones 880 1 - 0
David G Clayton 1428 0 - 1
Tony Byrne 1518 ½ - ½
Ronnie Whiteside 1765 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1498 = (5591 + 400 * (2 - 1)) / 4)

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