Event: IM Brown Shield

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Opponent Rating Result
Martyn Hamer 2140 0 - 1
Sean O McDonald 1928 ½ - ½
Mark R Priest 2230 ½ - ½
Daniel Langhamer 1822 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1930 = (8120 + 400 * (0 - 1)) / 4)

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