Event: 4th Cornwall Spring Minor

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Opponent	Rating	Result
Hazel Welch	1212	1 - 0
Ian P Blencowe	1512	0 - 1
Mac Holland	1574	0 - 1
Ben Barnett	1312	0 - 1
Michael P Foss	1491	1 - 0

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

1340 = (7101 + 400 * (2 - 3)) / 5)