Event: Division 2

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Opponent Rating Result
Kevin N Bendall 1621 0 - 1
Jeffrey Blumsom 1598 0 - 1
John H Sleggs 1520 1 - 0
Ian P Blencowe 1579 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1380 = (6318 + 400 * (1 - 3)) / 4)

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