Event: June Swiss 2023 Open

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Opponent Rating Result
Martin G Walker 2193 0 - 1
Andrew D Hartland 1886 1 - 0
Graham K Blowers 1751 1 - 0
David E Hall 1911 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1935 = (7741 + 400 * (2 - 2)) / 4)

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