Event: Guildford FIDE Congress

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Opponent	Rating	Result
Andrew Boughen	0	1 - 0
Chris W Heath	0	0 - 1
Philip M Stimpson	0	½ - ½
Richard Duncalfe	0	½ - ½
Robert McDonald	0	½ - ½

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

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