Event: Combined Banks and Insurance Chess League 2006-07

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Opponent	Rating	Result
Gary Callan	0	½ - ½
David A Tidmarsh	0	½ - ½
Colin Bartlett	0	½ - ½
Maria L Sant	0	1 - 0
Martin Lake	0	½ - ½

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

80 = (0 + 400 * (1 - 0)) / 5)