Event: Uxbridge - Watford (rapidplay)

Opponent Rating Result
Denisz Demjan 1313 1 - 0
Denisz Demjan 1313 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1313 = (2626 + 400 * (1 - 1)) / 2)

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