Event: Summer Tournament 2023

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Opponent Rating Result
Iwan Cave 2150 0 - 1
Rob Strachan 1200 0 - 1
James Gray 1214 0 - 1
Steve Saunders 1071 1 - 0
Rose Saunders 1030 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1253 = (6665 + 400 * (2 - 3)) / 5)

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