Event: B Division

Opponent Rating Result
David Boulden 1723 0 - 1
Victor Pelling 1135 1 - 0
Ian D Lamb 1659 0 - 1
Elliott Barnett 1635 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1338 = (6152 + 400 * (1 - 3)) / 4)

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