Event: Ball Cup

Opponent Rating Result
T Giles Stanton 1541 1 - 0
Peter J Hughes 1445 ½ - ½
Edward Higgs 1650 0 - 1
Aiden Griffiths 1330 ½ - ½
Colin G Vernon 1388 1 - 0
Chris Lee 1612 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1561 = (8966 + 400 * (2 - 1)) / 6)

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