Event: Division 2

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Opponent Rating Result
Ken Lawson 1418 1 - 0
W Douglas McLellan 1144 1 - 0
Martin Craven 970 1 - 0
Graham Brook 1190 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1581 = (4722 + 400 * (4 - 0)) / 4)

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