Event: Open

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Opponent	Rating	Result
Emil Angelov	165	½ - ½
Nigel K Hosken	189	0 - 1
Raymond Carpenter	155	½ - ½
Kevin Hurney	193	0 - 1
Andrew C Southall	177	1 - 0
Emil Angelov	165	½ - ½
Nigel K Hosken	189	1 - 0
Raymond Carpenter	155	1 - 0
Kevin Hurney	193	1 - 0
Andrew C Southall	177	0 - 1

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

216 = (1758 + 400 * (4 - 3)) / 10)