Event: Summer League Division 4

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Opponent	Rating	Result
Emerys Hillman	0	1 - 0
Steve Daykin	1360	½ - ½
Harry Heather	1679	½ - ½
John HT Eddershaw	1319	1 - 0
Alex Thorp	1371	1 - 0
Michael Howarth	1742	0 - 1
James Alex Brown	1489	½ - ½

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

1394 = (8960 + 400 * (3 - 1)) / 7)