Event: D&DCL Div 3

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Opponent	Rating	Result
Roger Moors	1550	½ - ½
Richard Dawson	1589	0 - 1
Graeme Drayton	1340	1 - 0
Graeme Drayton	1356	0 - 1
Shourya Eaga	0	1 - 0
Dudley Thorpe	1361	½ - ½
Talakalukoppa Amarnath	1585	0 - 1

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

1197 = (8781 + 400 * (2 - 3)) / 7)