Event: NSDCA Division 2

Opponent Rating Result
Roger W Walker 1630 0 - 1
Lukasz Michalek 1630 1 - 0
Stephen J Emmerton 1545 1 - 0
Julian N Hawthorne 1680 1 - 0
Caroline L Mountford 1602 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1857 = (8087 + 400 * (4 - 1)) / 5)

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