Event: Doncaster League

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Opponent Rating Result
Gordon Harrison 105 1 - 0
Hugh A Jones 101 ½ - ½
Patrick Wilson 55 1 - 0
Ian Farrow 108 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

192 = (369 + 400 * (2 - 1)) / 4)

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