Event: Maidstone Club Championship (22/23)

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Opponent	Rating	Result
Andrejs Gorskovs	1200	0 - 1
Dean Patience	1240	0 - 1
Cliff R Chandler	2276	0 - 1

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

1172 = (4716 + 400 * (0 - 3)) / 3)