Event: Minor Counties

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Opponent	Rating	Result
David Waud	1731	½ - ½
Andrew D Hartland	1869	0 - 1
Eric Gibbon	1865	0 - 1

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

1555 = (5465 + 400 * (0 - 2)) / 3)