Event: Portsmouth Club Championship

PDF Excel

Opponent	Rating	Result
Paul Eyles	1413	0 - 1
David E C (jnr) Ross	1757	½ - ½
J Humphrey	0	½ - ½

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

923 = (3170 + 400 * (0 - 1)) / 3)