Event: Division B

Opponent Rating Result
Jamie DOE 0 1 - 0
Robert Bird 1197 1 - 0
Graham J Kershaw 1712 0 - 1
David Harrison 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

927 = (2909 + 400 * (3 - 1)) / 4)

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