Event: 4 Board League B

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Opponent Rating Result
Paul G Day 1758 0 - 1
Callum Welsh 1948 ½ - ½
Mike J Barnett 1668 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1658 = (5374 + 400 * (0 - 1)) / 3)

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