Event: Lytham Club Championship

PDF Excel

Opponent	Rating	Result
John G Cooper	165	0 - 1
John Regan	112	1 - 0
Robert Tinton	125	0 - 1
Patrick N Coleman	108	1 - 0
Philip N Raynor	142	0 - 1

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

50 = (652 + 400 * (2 - 3)) / 5)