Event: Doncaster League

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Opponent Rating Result
Paul Shaw 0 0 - 1
John Smart 1681 ½ - ½
Alan Bramall 1825 ½ - ½
John E Beech 1645 1 - 0
Patrick McGrath 1327 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1376 = (6478 + 400 * (2 - 1)) / 5)

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