Event: Bak

Opponent Rating Result
Ralph Barraclough 1596 1 - 0
Derrick J Mason 1423 1 - 0
Joe Barraclough 1696 ½ - ½
Paul Kadzionis 1541 0 - 1
Steve Gledhill 1451 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1701 = (7707 + 400 * (3 - 1)) / 5)

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