Event: Club Championship 2022

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Opponent	Rating	Result
Joyal Kenus	0	½ - ½
Graham J Ashcroft	1945	0 - 1
Danny Aspden	1567	0 - 0

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

773 = (1945 + 400 * (0 - 1)) / 2)