Event: Div 2 - Weston Trophy

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Opponent	Rating	Result
Mithun Chakravorty	0	0 - 1
Jim Davis	1971	0 - 1
Oliver Brennan	1775	0 - 1
Jim Davis	1971	0 - 1
Ken A McIntosh	1804	½ - ½
John Trafford	1854	½ - ½
Callum Brewerton	1774	0 - 1

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

1307 = (11149 + 400 * (0 - 5)) / 7)