Event: Club Championship

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Opponent	Rating	Result
Raymond F Rhodes	1227
Roger Coleman	1212	1 - 0
Ken Elinor	1318	1 - 0
Robert Perry	1181	½ - ½
Gwyn Price	1100	1 - 0
Raymond F Rhodes	1220
Roger Coleman	1242	1 - 0
Ken Elinor	1250	0 - 1
Robert Perry	1181
Gwyn Price	1100	0 - 1

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

1315 = (8403 + 400 * (4 - 2)) / 7)