Event: Division Four

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Opponent Rating Result
Simon A Jones 1383 0 - 1
Steve Berry 1501 ½ - ½
Chris Moore 1525 0 - 1
Wojciech Slupski 1405 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1154 = (5814 + 400 * (0 - 3)) / 4)

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