Event: Steele Cup

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Opponent	Rating	Result
Alex Simmonds	1550	0 - 1
Peter LT Blundell	1698	1 - 0
Dominic Blundell	1630	0 - 1
John Thorley	1600	½ - ½
Alan D Evans	1680	1 - 0
John Thorley	1600	0 - 1
Matthew Causer	1654	0 - 1

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

1516 = (11412 + 400 * (2 - 4)) / 7)