Event: League Division 2

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Opponent	Rating	Result
Olli Bonada	0	½ - ½
Neil Griffiths	1566	0 - 1
Paul W Anderson	1728	½ - ½
Jesse Baggett-Lahav	1517	0 - 1
Andrew Zigmond	1605	½ - ½
Liam Knox	1555	0 - 1
Jim R Postill	1410	1 - 0

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

1226 = (9381 + 400 * (1 - 3)) / 7)