Event: Division 2

Opponent Rating Result
Stuart R Acton 1301 ½ - ½
John Foo 1534 1 - 0
Stefan H Reiss 1390 1 - 0
Paul W Jones 1657 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1671 = (5882 + 400 * (2 - 0)) / 4)

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