Event: Division 2

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Opponent Rating Result
Michael Hayward 1642 ½ - ½
Paul Cumberbatch 1743 0 - 1
Adrian DP Waldock 1697 ½ - ½
Sam Smith 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1271 = (5082 + 400 * (1 - 1)) / 4)

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