Event: Clough (Handicap)

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Opponent	Rating	Result
Andrew Walker	1380	½ - ½
Nick Mullan	1561	½ - ½
Richard Porter	1868	0 - 1

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

1470 = (4809 + 400 * (0 - 1)) / 3)