Event: Open County Championship

Opponent Rating Result
Andrew J Donnelly 1834 1 - 0
Colin J Solloway 1656 1 - 0
Mervyn J Hughes 1938 0 - 1
Piotr Wasilak 0 0 - 1
Ramsey Dairi 1499 1 - 0
Mervyn J Hughes 1938 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1544 = (8865 + 400 * (3 - 2)) / 6)

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