Event: SCCU County Championship: Open

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Opponent	Rating	Result
Peter Large	2314	0 - 1
Anthony J Stebbings	2239	½ - ½
Luke E Rutherford	2245	1 - 0
Neil R McDonald	2484	0 - 1
Luke E Rutherford	2245	½ - ½
Akshaya Kalaiyalahan	2238	½ - ½

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

2228 = (13765 + 400 * (1 - 2)) / 6)