Event: SCCU County Championship: u2050

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Opponent	Rating	Result
David Jones	1880	½ - ½
Philip Staniland	1867	1 - 0
Philip Staniland	1867	0 - 1

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

1871 = (5614 + 400 * (1 - 1)) / 3)