Event: Division 2

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Opponent Rating Result
William Hastings 1500 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1100 = (1500 + 400 * (0 - 1)) / 1)

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Opponent Rating Result
John C Staplehurst 1505 ½ - ½
Matthew Jiggins 1386 0 - 1
Clive Bellinger 1660 0 - 1
Ben Viner 1400 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1288 = (5951 + 400 * (0 - 2)) / 4)