Event: 5th Simon Bartlett Memorial Major

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Opponent	Rating	Result
Ian C Clark	1953	0 - 1
John CH Nyman	1853	0 - 1
John Torrance	1674	0 - 1
Ronnie Burton	1744	0 - 1

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

1406 = (7224 + 400 * (0 - 4)) / 4)