Event: Durham League Division B

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Opponent	Rating	Result
Ian Hunter	1345	½ - ½
Jason Robson	1465	1 - 0
William Bartram	1876	0 - 1
Ilya Bowman	1450	½ - ½
Benjamin Perryman	1599	0 - 1
Thomas Dobson	1216	0 - 1
Barry Edgar	1587	½ - ½
David Pizzi	1100	1 - 0
Mark Edmundson	1306	0 - 1

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

1349 = (12944 + 400 * (2 - 4)) / 9)