Event: Margate 100

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Opponent Rating Result
Colin G Gregory 1615 0 - 1
Leon A Garfield 1480 0 - 1
Michael Doyle 1383 0 - 1
Clive J Le Baigue 1548 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1307 = (6026 + 400 * (1 - 3)) / 4)

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