Event: Division 1

Opponent Rating Result
Colin J Davis 2110 ½ - ½
Thomas Gregory 1776 1 - 0
Roy Phillips 2184 ½ - ½
Duncan D Grossett 2017 0 - 1
Andy Hill 1978 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1933 = (10065 + 400 * (1 - 2)) / 5)

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