Event: Clough (Handicap)

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Opponent	Rating	Result
Les Johnson	129	½ - ½
Mahboob Nawaz	115	0 - 1
John Redmond	0	1 - 0

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

81 = (244 + 400 * (1 - 1)) / 3)