Event: Division 3

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Opponent Rating Result
Robert J Frith 1771 0 - 1
Gerard Varney 1540 1 - 0
Colin Dougherty 1567 ½ - ½
Martin Hargreaves 1489 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1692 = (6367 + 400 * (2 - 1)) / 4)

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