Event: Walker Shield

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Opponent Rating Result
William Quinn 1350 1 - 0
Phil Evans 1400 1 - 0
Bob Wallace 1408 0 - 1
I Redmond 1340 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1475 = (5498 + 400 * (2 - 1)) / 4)

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