Event: Division B

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Opponent Rating Result
Dave S Almond 1756 0 - 1
Steve G Hughes 1495 0 - 1
Brian Davies 1286 1 - 0
Martin Craven 970 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1377 = (5507 + 400 * (2 - 2)) / 4)

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