Event: D&DCL Div 2

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Opponent	Rating	Result
Brian Lever	1555	½ - ½
Kevin J Gallagher	1705	½ - ½
Kevin J Gallagher	1705	0 - 1
David Hatton	0	0 - 1
Douglas Bramley	1353	1 - 0
Vaughan WG Smith	1593	½ - ½
Ray Sawyer	1563	½ - ½

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

1296 = (9474 + 400 * (1 - 2)) / 7)