Event: Weymouth Club Championship - Rated

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Opponent	Rating	Result
Ken Jackson	1318	1 - 0
Michael Ellery	1200	1 - 0
Kaifer Rait-McDonald	1600	0 - 1
John E Balem	1522	0 - 1
Guy Prendergast	1200	½ - ½
Rachel Reed	1465	1 - 0
Chris JP Leeson	1806	0 - 1

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

1444 = (10111 + 400 * (3 - 3)) / 7)