Event: Holly & the Ivy Chess League

PDF Excel

Opponent	Rating	Result
Dave Colledge	1781	0 - 1
Gerald Cuaresma	1600	0 - 1
Dave Gray	1738	1 - 0
Dave Colledge	1762	0 - 1

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

1520 = (6881 + 400 * (1 - 3)) / 4)