Event: Division 2

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Opponent	Rating	Result
Tom Bramley	1776	1 - 0
Jason Skelton	1682	½ - ½
Peter Newton	1758	0 - 1
Jason Skelton	1709	0 - 1
Rod B Newbery	1751	½ - ½
James A Briginshaw	1770	0 - 1
Alan Wadsworth	1683	0 - 1
Stuart J Jeffreys	1759	½ - ½

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

1586 = (13888 + 400 * (1 - 4)) / 8)