Event: Open Rapid-play

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Opponent	Rating	Result
Jwalant Shukla	1650	1 - 0
Tim A Lane	1930	0 - 1
Matthew McLachlan	1961	0 - 1
Ian Emery	1928	0 - 1
Okwose Marc Obi	1917	0 - 1
Jwalant Shukla	1650	1 - 0
Tim A Lane	1930	0 - 1
Matthew McLachlan	1961	0 - 1
Ian Emery	1928	1 - 0
Okwose Marc Obi	1917	0 - 1

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

1717 = (18772 + 400 * (3 - 7)) / 10)