Event: Walker Shield

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Opponent Rating Result
Oliver Ladd 1000 0 - 1
Mike Jenkinson 1308 0 - 1
Teddy Horsford 1000 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

969 = (3308 + 400 * (1 - 2)) / 3)

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Opponent Rating Result
Paul Verrall 1369 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

969 = (1369 + 400 * (0 - 1)) / 1)