Event: Silver Rook

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Opponent Rating Result
Stephen Burton 99 0 - 1
Angelica Rowe 0 1 - 0
John M Rose 0 1 - 0
Mick Beavers 81 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

45 = (180 + 400 * (2 - 2)) / 4)

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