Event: Durham League Division B

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Opponent	Rating	Result
Daniel Turnbull	1774	0 - 1
Michael Smalley	1516	0 - 1
Barry Edgar	1575	½ - ½

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

1355 = (4865 + 400 * (0 - 2)) / 3)