Event: NCCA League Division 4

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Opponent Rating Result
Henry Lin 1350 0 - 1
Heather Enid Walker 1189 1 - 0
David P Jones 1407 ½ - ½
Ben Payne 1226 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1193 = (5172 + 400 * (1 - 2)) / 4)

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