Event: Div2

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Opponent	Rating	Result
Aditya Munshi	191	0 - 1
Kevin J Dalley	163	0 - 1
David Hulme	143	0 - 1
Maurice J Hill	147	0 - 1
Philip Sheldon	134	0 - 1
Antony A Clare	159	0 - 1
Paul L Moore	136	0 - 1
Alex Webster	148	0 - 1
Graham J Pace	119	½ - ½
David Hoddy	141	1 - 0
Antony M Allen	143	0 - 1

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

-143 = (1624 + 400 * (1 - 9)) / 11)