Event: Silver Rook

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Opponent Rating Result
Tamas Kovacs 0 1 - 0
Dave Young 79 0 - 1
Roger N Winterburn 114 0 - 1
Ben Emmerson 109 0 - 1
David Halpin 63 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-7 = (365 + 400 * (2 - 3)) / 5)

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