Event: B Division

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Opponent Rating Result
Martyn Hamer 2124 ½ - ½
Robert A Newton 1965 0 - 1
Kelechukwu Nkwonta 1850 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1846 = (5939 + 400 * (0 - 1)) / 3)

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