Event: Division B

Opponent Rating Result
Peter Harrington 101 1 - 0
Sean Fitzgibbon 146 ½ - ½
Ian Williamson 137 1 - 0
George Markovic 139 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

331 = (523 + 400 * (2 - 0)) / 4)

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