Event: OTB Club Championship

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Opponent	Rating	Result
Peter A Nickals	1705	0 - 1
Davide Segat	1531	½ - ½
Joseph Rosenberg	1516	1 - 0
David J Rawlings	1680	0 - 1
Terry C Skippen	1475	0 - 1
James Walsh	1486	1 - 0
Aaryan Patnam	1480	0 - 1

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

1439 = (10873 + 400 * (2 - 4)) / 7)