Event: B Division

Opponent Rating Result
Simon Wright 1766 0 - 1
David Kierman 1799 ½ - ½
Hunain Malik 1689 ½ - ½
Andrew Crowther 1689 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1536 = (6943 + 400 * (0 - 2)) / 4)

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