Event: Club Championship Div 1

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Opponent	Rating	Result
Richard WY Lee	2141	½ - ½
Kamil Zak	2015	½ - ½
David Lambton	1875	1 - 0

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

2144 = (6031 + 400 * (1 - 0)) / 3)