Event: Durham League Division B

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Opponent	Rating	Result
Theo Jenkins	0	0 - 1
Samuel Bradford	0	½ - ½
Paul D McGuigan	0	0 - 1
Graham W Matthews	1580	1 - 0
Andy Proudfoot	1531	1 - 0
Mark T Priest	1431	1 - 0
Paul Freeman	1476	0 - 1

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

860 = (6018 + 400 * (3 - 3)) / 7)