Event: Division 2

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Opponent Rating Result
Paul Gibson 1670 ½ - ½
Oliver Penney 1675 1 - 0
David J Walton 1615 1 - 0
Paul Mottram 1593 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1738 = (6553 + 400 * (2 - 1)) / 4)

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