Event: Division B

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Opponent Rating Result
David E Aspinall 1639 ½ - ½
Janos Mak 1588 0 - 1
David Tuke 1583 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1603 = (4810 + 400 * (1 - 1)) / 3)

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