Event: Division 4

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Opponent Rating Result
Philip Sykes 1523 0 - 1
Keith Milner 1357 1 - 0
Peter FK Evans 1400 ½ - ½
Brian Jones 1124 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1451 = (5404 + 400 * (2 - 1)) / 4)

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