Event: Division 2

Opponent Rating Result
Rajan Mistry 1643 ½ - ½
John Foo 1479 0 - 1
Bedat Lee 1533 1 - 0
Mick Beavers 1255 ½ - ½
Robert Walwyn 0 ½ - ½
Ian Craig 1409 0 - 1
Daniel Geng 1061 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1197 = (8380 + 400 * (2 - 2)) / 7)

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