Event: 5th Somerset New Year Intermediate

PDF Excel

Opponent	Rating	Result
Pengxiao Zhu	1335	0 - 1
Andrew Rodger	0	½ - ½
Peter Ackland	0	1 - 0
Stephen Williams	0	0 - 1

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

234 = (1335 + 400 * (1 - 2)) / 4)