Event: Harrogate Evening League 2019-20

PDF Excel

Opponent	Rating	Result
Andrew Zigmond	123	1 - 0
Alan Riddle	79	1 - 0
Paul Salisbury	130	1 - 0
Peter Gregory	112	1 - 0

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

511 = (444 + 400 * (4 - 0)) / 4)