Event: Division 3

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Opponent Rating Result
Seth Milner 1150 ½ - ½
Ian Boddington 1150 0 - 1
Tom Woodhall 1150 0 - 1
Stephen Luff 1150 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

850 = (4600 + 400 * (0 - 3)) / 4)

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