Event: Derby & District Division 3

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Opponent	Rating	Result
Peter Rose	1491	0 - 1
Shourya Eaga	1534	0 - 1
Shish Ganapathi	1359	0 - 1
George K Heath	1477	0 - 1
David Hall	1529	1 - 0

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

1238 = (7390 + 400 * (1 - 4)) / 5)