Event: Norfolk County Chess Championships

Opponent Rating Result
Benjamin PQ Collinson 2072 ½ - ½
Stephen LA Orton 2159 0 - 1
Dave Dempster 1930 1 - 0
Adrian G Elwin 1994 0 - 1
Mark Lim 1918 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1935 = (10073 + 400 * (1 - 2)) / 5)

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