Event: Beverley Club Championship

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Opponent	Rating	Result
Tim M Turner	161	0 - 1
Steve Tomlinson	102	1 - 0
Derek A Sheppard	135	0 - 1
Esmond Harding	89	1 - 0
Alec Grice	138	½ - ½

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

125 = (625 + 400 * (2 - 2)) / 5)