Event: Division 4B

Opponent Rating Result
Soumil Saha 1392 0 - 1
Oba G Kofi 1353 ½ - ½
John Reeve 1433 1 - 0
Rafal Cala 1497 1 - 0
Ed Swann 1350 0 - 1
Mark Thwaites 1516 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1490 = (8541 + 400 * (3 - 2)) / 6)

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