Event: Ipswich Chess Club Championship

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Opponent	Rating	Result
John Broadwater	0	0 - 1
Les J Jones	1744	0 - 1
Piotr Dolewka	1616	0 - 1

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

720 = (3360 + 400 * (0 - 3)) / 3)