Event: Hargreaves Shield

PDF Excel

Opponent	Rating	Result
Paul Ruffle	140	½ - ½
Andy Flood	106	0 - 1
Robert Twigg	74	0 - 1
Michael White	60	1 - 0
Roy J McAloney	83	0 - 1

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

-67 = (463 + 400 * (1 - 3)) / 5)