Event: Durham City Club Championship

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Opponent	Rating	Result
Fedir Dyshliuk	0	½ - ½
Oliver Belcher	0	1 - 0
George Gazis	0	0 - 1

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

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