Event: Division 2

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Opponent Rating Result
Bowie Carter 1275 1 - 0
Stephen Gaskell 1275 0 - 1
Mike Peers 1458 ½ - ½
David Jarvis 1488 ½ - ½
Tim Berry 1275 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1274 = (6771 + 400 * (1 - 2)) / 5)

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