Event: Norfolk County Chess Championships

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Opponent Rating Result
James Pack 1868 1 - 0
Benjamin PQ Collinson 1972 1 - 0
Stephen LA Orton 2116 1 - 0
Martin G Walker 2239 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2249 = (8195 + 400 * (3 - 1)) / 4)

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