Event: York Club Championship

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Opponent	Rating	Result
Ewen Miller	1817	0 - 1
Vinayak Prasad	1524	0 - 1
Philippe Radault	1588	0(def) - 1
Will Orpin	1104	1 - 0
Norman G Andrews	1628	½ - ½
Herbert Lockwood	1615	½ - ½
Paul W Jones	1637	0 - 1

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

1421 = (9325 + 400 * (1 - 3)) / 6)