Event: Kenneth Appleby (U1700)

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Opponent	Rating	Result
Tom Devlin	1503	0 - 1
Ben Van Loo	0	0 - 1
S Neil Bolton	1338	0 - 1
Pete Brennan	1539	0 - 1

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

695 = (4380 + 400 * (0 - 4)) / 4)