Event: Division 2

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Opponent	Rating	Result
Paul J Colburn	2050	1 - 0
Tom Darling	1980	0 - 1
Richard J E McNally	1986	0 - 1
Colin Searle	1864	½ - ½
Paul Silverman	1572	0 - 1
Julian H Summerfield	1853	½ - ½
Andy Johnson	1631	0 - 1
Jon M Griffiths	1829	½ - ½

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

1696 = (14765 + 400 * (1 - 4)) / 8)