Event: Division 3

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Opponent	Rating	Result
Keith W Roper	1735	1 - 0
David Erentz	1699	0 - 1
Richard Dyce	1468	1 - 0
Keith W Roper	1735	1 - 0
Andrew Watson	1558	0 - 1
Paul D Rees	1585	1 - 0
Marian Talmacel	1600	0 - 1
Nigel D Marshall	1513	½ - ½

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1662 = (12893 + 400 * (4 - 3)) / 8)