Event: Hull Champs Swiss

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Opponent	Rating	Result
Xiaofan Li	1791	0 - 1
Sean Smith	1528	1 - 0
Benedikt Pitel	1338	0 - 1
Christopher J Harris	1481	1 - 0
John Scotter	1526	0 - 1
Neil Hambly	1375	1 - 0
William I Wright	1610	1 - 0
Hussam Al Haidar	1525	½ - ½

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

1572 = (12174 + 400 * (4 - 3)) / 8)