Event: Open

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Opponent	Rating	Result
Athar Ansari	2104	1 - 0
Chris Chadwick	1998	1 - 0
Patrick CM Duncan	2170	1 - 0
Nicholas A Walker	1960	1 - 0
Athar Ansari	2104	½ - ½
Chris Chadwick	1998	½ - ½
Patrick CM Duncan	2170	½ - ½
Nicholas A Walker	1960	1 - 0

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

2308 = (16464 + 400 * (5 - 0)) / 8)