Event: Open Rapid-play

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Opponent	Rating	Result
Henrik Stepanyan	2317	½ - ½
Donald J Mason	2154	½ - ½
Athar Ansari	2100	½ - ½
Chris Chadwick	1998	0 - 1
Henrik Stepanyan	2317	½ - ½
Donald J Mason	2154	½ - ½
Athar Ansari	2100	½ - ½
Chris Chadwick	1998	1 - 0

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

2142 = (17138 + 400 * (1 - 1)) / 8)