Event: B Division

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Opponent	Rating	Result
Adam Scoular	1905	½ - ½
Robert A Newton	1965	1 - 0
Adam Tyton	1872	½ - ½
Austin C Elliott	1918	½ - ½
Mike J Surtees	2107	0 - 1
Ali Reza Jaunooby	2253	½ - ½
Jonathan S Hill	1999	0 - 1
Joao Rita	2035	½ - ½

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

1957 = (16054 + 400 * (1 - 2)) / 8)