Event: Division A

Opponent Rating Result
Ethan Norris 2075 0 - 1
Jim Sumner 0 0 - 1
Graham J Ashcroft 1953 ½ - ½
Shaun Tumelty 1480 1 - 0
Phil M Taylor 1879 1 - 0
Paul D Doherty 1756 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1457 = (9143 + 400 * (2 - 3)) / 6)

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