Event: Dudley Townshend Trophy

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Opponent Rating Result
Mark Tangri 115 1 - 0
Roger Threlfall 131 ½ - ½
David J Friend 121 ½ - ½
Graham Barrett 111 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

320 = (478 + 400 * (2 - 0)) / 4)

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