Event: u1850 County Championship

Opponent Rating Result
Bernard Duff 1777 ½ - ½
Brian D Judkins 1768 ½ - ½
Armando Galletti 1675 ½ - ½
Alan PH Norman 1664 1 - 0
Andrew Maclaren 1755 0 - 1
David E McLean 1697 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1656 = (10336 + 400 * (1 - 2)) / 6)

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