Event: B Division

Opponent Rating Result
Paul D Perrett 1811 0 - 1
Santiago Palencia 1600 1 - 0
Andrew Herrity 1437 0 - 1
Peter McKay 1594 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1411 = (6442 + 400 * (1 - 3)) / 4)

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