Event: Doncaster Bell Trophy

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Opponent	Rating	Result
Peter Convery	153	0 - 1
Colin Parrish	93	1 - 0
Neil Todd	143	1 - 0
Tony Pogson	159	0 - 1
Alan Bramall	141	1 - 0
Peter M Tate	129	1 - 0
John P Mainwaring	140	0 - 1
Gordon Harrison	105	1 - 0
Peter M Tate	129	1 - 0
Peter Convery	153	0 - 1
Alan Bramall	141	1 - 0
Gordon Harrison	105	1 - 0
Colin Parrish	93	1 - 0
Neil Todd	143	1 - 0
John P Mainwaring	140	0 - 1
Peter M Tate	129	1 - 0
Tony Pogson	159	0 - 1
Peter M Tate	129	1 - 0

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

266 = (2384 + 400 * (12 - 6)) / 18)