Event: Spring Swiss

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Opponent Rating Result
Heather Enid Walker 1238 1 - 0
Olly Shaw 1536 0 - 1
Ken Farquhar 1522 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1299 = (4296 + 400 * (1 - 2)) / 3)

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