Event: Worcestershire Rapidplay league

Opponent Rating Result
Stephen V Woodhouse 1888 0 - 1
Chris Lee 1612 0 - 1
Simon Berry 1452 0 - 1
Stephen V Woodhouse 1888 ½ - ½
Chris Lee 1612 0 - 1
Simon Berry 1452 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1451 = (9904 + 400 * (1 - 4)) / 6)

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