Event: ED Walker Shield

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Opponent Rating Result
Sam Ball 1429 0 - 1
Liam Bellwood 1764 0 - 1
Carl Stephens 1598 1 - 0
Luke Owen 1561 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1488 = (6352 + 400 * (1 - 2)) / 4)

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