Event: Silver Rook

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Opponent Rating Result
Ben Emmerson 109 ½ - ½
Steve Parker 157 0 - 1
Richard Hersey 132 0 - 1
Nigel Redmond 121 ½ - ½
John Hipshon 123 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-32 = (642 + 400 * (0 - 2)) / 5)

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