Event: Doncaster Bell Trophy

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Opponent	Rating	Result
Martin S Simmonds	1805	0 - 1
Paul Hagan	1150	1 - 0
Patrick McGrath	0	1 - 0
T Ed Sowerby	1703	½ - ½
Martin S Simmonds	1805	½ - ½
Paul Hagan	1150	1 - 0
Patrick McGrath	0	1 - 0
T Ed Sowerby	1703	0 - 1

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

1265 = (9316 + 400 * (4 - 2)) / 8)