Event: Division Four

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Opponent Rating Result
David J Carpenter 1541 0 - 1
Roger Ball 1495 1 - 0
Wojciech Slupski 1437 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1624 = (4473 + 400 * (2 - 1)) / 3)

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