Event: HERCA Championship

Opponent Rating Result
Tim M Turner 1909 0 - 1
Stephen Crow 1819 1 - 0
Mark I Collinson 1979
Tim M Turner 1909
Stephen Crow 1899
Mark I Collinson 1959
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1864 = (3728 + 400 * (1 - 1)) / 2)

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