Event: Division 4

PDF Excel

Opponent	Rating	Result
Roger Ball	1471	½ - ½
Wojciech Slupski	1439	0 - 1
Hok Chiu	1270	½ - ½
Richard Buxton	1468	0 - 1
Roger Ball	1482	0 - 1
Chris Aldridge	1343	½ - ½
Andrew Powell	1417	0 - 1

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

1184 = (9890 + 400 * (0 - 4)) / 7)