Event: League Division 1

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Opponent Rating Result
David Wells 1856 ½ - ½
John Grasham 1604 0 - 1
Herbert Lockwood 1615 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1558 = (5075 + 400 * (0 - 1)) / 3)

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