Event: 53rd Cotswold Open

Opponent Rating Result
Jonathan WR Underwood 2082 ½ - ½
Richard CP Freeman 1975 0 - 1
Ethan Pang 1750 0 - 1
Keith Downey 1758 1 - 0
Robert M Ashworth 1897 1 - 0
Graham Bolt 2058 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1853 = (11520 + 400 * (2 - 3)) / 6)

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