Event: B Division

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Opponent	Rating	Result
Ali Reza Jaunooby	2253	0 - 1
Jonathan S Hill	1999	0 - 1
Austin C Elliott	1918	1 - 0

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

1923 = (6170 + 400 * (1 - 2)) / 3)