Event: IM Brown Shield

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Opponent Rating Result
Mark Shelmerdine 1617 ½ - ½
Nathaniel Holroyd-Doveton 1704 ½ - ½
Ian Gaskin 1416 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1712 = (4737 + 400 * (1 - 0)) / 3)

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