Event: Open County Championship

PDF Excel

Opponent	Rating	Result
Steve J Pullinger	2007	½ - ½
Thomas P O'Brien	2133	1 - 0
Oliver J Lenton	1951	0 - 1
Philip R Bonafont	2078	0 - 1
Adrian G Elwin	1952	0 - 1
Dan Waller	2086	½ - ½

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

1901 = (12207 + 400 * (1 - 3)) / 6)