Event: 4th Cornwall Online Congress

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Opponent	Rating	Result
Trevor Palmer	0	½ - ½
Hugh Brown	0	0 - 1
Philip May	0	0 - 1
Maria Evdokimova	1442	1 - 0
Martin Pope	1620	1 - 0(def)
Nigel J Kirkman	1659	0 - 1
Ian Renshaw	1440	½ - ½

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

624 = (4541 + 400 * (1 - 3)) / 6)