Event: Weymouth Club Championship - Rated

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Opponent	Rating	Result
Malcolm J Steevens	1721	0 - 1
Steve Blake	1737	0 - 1
Andre Labouchardiere	1353	1 - 0
Michael Ellery	1220	0 - 1
Chris JP Leeson	1803	0 - 1
Guy Prendergast	1200	1 - 0

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

1372 = (9034 + 400 * (2 - 4)) / 6)