Event: Norfolk County Chess Championships

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Opponent Rating Result
Martin G Walker 2206 0 - 1
David E McLean 1795 1 - 0
Darrell N Pigott 1938 0 - 1
Armando Galletti 1756 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1724 = (7695 + 400 * (1 - 3)) / 4)

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