Event: u1850 County Championship

Opponent Rating Result
James Irwin 1768 0 - 1
Alan PH Norman 1708 0 - 1
John E Dolamore 1802 1 - 0
Ed Kirkham 1741 0 - 1
Peter Barkas 1788 1 - 0
David E McLean 1791 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1633 = (10598 + 400 * (2 - 4)) / 6)

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