Event: OL Swiss (10 + 5) Rapid 2

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Opponent	Rating	Result
Nandi Korossy	1610	0 - 1
Nigel White	1420	0(def) - 1

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

1210 = (1610 + 400 * (0 - 1)) / 1)