Event: Division C

Opponent Rating Result
Paul Ashton 1587 1 - 0
Patrick N Coleman 1490 1 - 0
Bill Laurie 1450 ½ - ½
Patrick N Coleman 1490 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1704 = (6017 + 400 * (2 - 0)) / 4)

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