Event: Open

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Opponent	Rating	Result
Donald J Mason	2191	0 - 1
Mark L Hebden	2572	0 - 1
Bruce L Baer	2127	1 - 0
Patrick CM Duncan	2170	½ - ½
Nicholas A Walker	1960	1 - 0
Donald J Mason	2191	½ - ½
Mark L Hebden	2572	0 - 1
Bruce L Baer	2127	1 - 0
Patrick CM Duncan	2170	½ - ½
Nicholas A Walker	1960	½ - ½

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

2204 = (22040 + 400 * (3 - 3)) / 10)