Event: Derbyshire Individual

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Opponent	Rating	Result
David Hatton	0	1 - 0
Frank Richmond	0	1 - 0
Daniel Blumenow	0	1 - 0
Paul Madden	0	1 - 0
Martin Pettinger	0	½ - ½
John Potter	0	½ - ½
David Williams	0	1 - 0
John Potter	0	0 - 1

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

200 = (0 + 400 * (5 - 1)) / 8)