Event: Division 4

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Opponent	Rating	Result
Andrew Mowat	130	0 - 1
Jon EW Blackburn	144	0 - 1
Harry Gardiner	131	½ - ½
Peter J Windows	129	1 - 0
Steve Whatmore	142	½ - ½
Gareth R Burndred	114	0 - 1
Jon EW Blackburn	144	1 - 0

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

76 = (934 + 400 * (2 - 3)) / 7)