Event: Div2

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Opponent	Rating	Result
David Smith	157	1 - 0
Brian Homewood	141	0 - 1
Philip Sheldon	139	½ - ½
David J Pickering	145	½ - ½
Mike Allen	122	1 - 0
Philip Sheldon	134	1 - 0
Andre Cockburn	111	1 - 0
Michael WA Hoare	129	1 - 0
Michael D Boreham	116	0 - 1

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

266 = (1194 + 400 * (5 - 2)) / 9)