Event: Division One

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Opponent	Rating	Result
Stephen B James	1977	½ - ½
Timothy J Davis	1952	0 - 1
Derek R Johnson	1999	0 - 1
Roger D de Coverly	1971	½ - ½
Ian Duvall	2011	½ - ½
Charles ES Bullock	1989	0 - 1
Charles ES Bullock	1957	0 - 1
David V Deane	1821	½ - ½
James N Stayt	1896	½ - ½

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

1775 = (17573 + 400 * (0 - 4)) / 9)