Event: MCA Division 1

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Opponent	Rating	Result
Peter O'Driscoll	2020	1 - 0
Piotr Januszewski	2005	1 - 0
David J James	2140	½ - ½
Daniel Rowlandson	1975	1 - 0
Edward H Taylor	1923	1 - 0
James N Hawkins	1870	1 - 0

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

2322 = (11933 + 400 * (5 - 0)) / 6)