Event: Division 4

Opponent Rating Result
Malcolm H Cooper 1724 0 - 1
Mark Payne 1769 ½ - ½
Edward Hargreaves 1576 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1556 = (5069 + 400 * (0 - 1)) / 3)

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