Event: Division 5

Opponent Rating Result
John A Amison 1600 ½ - ½
Mick J Frings 1329 1 - 0
James Bradshaw 1400 0 - 1
Philip Erentz 1563 ½ - ½
Robert Garnett 1601 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1579 = (7493 + 400 * (2 - 1)) / 5)

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