Event: Norfolk County Chess Championships

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Opponent Rating Result
Vivash Samarakoon 2137 0 - 1
Andrew D Hartland 1847 1 - 0
Ken B McEwan 2125 ½ - ½
Adrian G Elwin 2025 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1934 = (8134 + 400 * (1 - 2)) / 4)

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