Event: Silver Rook

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Opponent Rating Result
Brad Slater 1721 ½ - ½
Bertie Leatham 1162 ½ - ½
Noah Helme 1409 0 - 1
Ralph Barraclough 1596 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1472 = (5888 + 400 * (1 - 1)) / 4)

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