Event: Division B

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Opponent Rating Result
Philip N Raynor 1788 0 - 1
Paul O'Mara 1653 ½ - ½
William J Moffatt 1653 0 - 1
Philip N Raynor 1788 0 - 1
Kevin Birch 0 0 - 1
Peter Wallace 1428 ½ - ½
Robert Hart 1660 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1253 = (9970 + 400 * (1 - 4)) / 7)

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