Event: Worcestershire Championship League

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Opponent	Rating	Result
Marcus Walsh	1980	½ - ½
Stewart K Fishburne	2061	½ - ½
Stewart K Fishburne	2061	½ - ½
Jonathon Vaughan	2043	0 - 1
Harry G Evans	1878	0 - 1
Gavin Cartwright	1859	0 - 1
Ed Osbourn	1994	½ - ½
Tony Shaw	1733	0 - 1
Brian Turner	1970	½ - ½
Brian Turner	1970	0 - 1

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

1755 = (19549 + 400 * (0 - 5)) / 10)