Event: OTB Blitz Championship

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Opponent	Rating	Result
John Cawdery	2056	0 - 1
Krishna Raikundalia	1544	0 - 1
James Walsh	1300	1 - 0
Karun Suresh	0	1 - 0
Ivan Hutcheson	1508	1 - 0
Philip Staniland	1877	0 - 1
Jay Sharman	1655	1 - 0

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

1477 = (9940 + 400 * (4 - 3)) / 7)