Event: B Division

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Opponent Rating Result
David Kelly 1590 ½ - ½
Nikhil Bhandari 1707 0 - 1
Stephen Halliday 1600 0 - 1
Paul Scott 1250 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1437 = (6147 + 400 * (1 - 2)) / 4)

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