Event: LCA Division 2

Opponent Rating Result
Peter Holman 1561 0 - 1
Ian McDonald 1720 ½ - ½
Andrew T Watson 1421 ½ - ½
Jules Brown 1713 0 - 1
Robert J Arthurton 1572 1 - 0
Grenville Wollerton 1737 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1487 = (9724 + 400 * (1 - 3)) / 6)

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