Event: Guildford FIDE Congress

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Opponent	Rating	Result
Paolo Dixon	0	1 - 0
Alistair Hill	0	0 - 1
Emily Maton	0	0 - 1
Daniel J Young	0	½ - ½
Daniel Sutton	0	0 - 1

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

-160 = (0 + 400 * (1 - 3)) / 5)