Event: York Summer 2023 Group 2

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Opponent	Rating	Result
Derek Toyne	0	½ - ½
T Noel Stewart	0
Herbert Lockwood	0	1 - 0
David Wm Smith	0	½ - ½
Paul W Jones	0	½ - ½
Daniel Meredith	0	½ - ½
Norman G Andrews	0	1 - 0
Jack Howorth	0	0 - 1

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

57 = (0 + 400 * (2 - 1)) / 7)