Event: B Division

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Opponent Rating Result
Andrew G French 1619 ½ - ½
Geoffrey Howsden 1401 1 - 0
Paul Weightman 1548 ½ - ½
Kevin M Waterman 1591 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1740 = (6159 + 400 * (2 - 0)) / 4)

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