Event: B Division

Opponent Rating Result
Garry J Hewitt 1638 0 - 1
Joseph Thomas Machin 0 ½ - ½
Sahil Farooq 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

279 = (1638 + 400 * (0 - 2)) / 3)

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