Event: HDCA Summer League Section 1

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Opponent Rating Result
Stephen Greep 137 0 - 1
Andrew D Bettley 148 ½ - ½
Ned Carmichael 120 0 - 1
Phil H Crook 115 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-70 = (520 + 400 * (0 - 2)) / 4)

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