Event: Dudley Townshend Trophy

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Opponent Rating Result
Karl L Chan 1515 1 - 0
Oliver Green 1568 0 - 1
Peter W Lawrence 1683 1 - 0
Ron Evans 1569 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1684 = (6335 + 400 * (2 - 1)) / 4)

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