Event: Silver Rook

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Opponent Rating Result
Elliot Gray-Clough 112 1 - 0
Alan Riddle 83 1 - 0
Peter Catt 0 0 - 1
Stephen Burton 99 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

274 = (294 + 400 * (3 - 1)) / 4)

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