Event: Division A

Opponent Rating Result
Conor Reaney 1868 ½ - ½
Tak-Shing Chan 0 1 - 0
David E Aspinall 1733 1 - 0
Paul O'Mara 1676 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1519 = (5277 + 400 * (2 - 0)) / 4)

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