Event: Beverley Club Championship

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Opponent	Rating	Result
Alec Grice	138	0 - 1
Stephen Philp	128	½ - ½
David J Gibson	114	0 - 1
Steve Tomlinson	102	½ - ½
Esmond Harding	89	½ - ½

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

-46 = (571 + 400 * (0 - 2)) / 5)