Event: Middlesbrough Club Championship

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Opponent Rating Result
Nicholas Tavoularis 2220 0 - 1
Andrew Salter 900 1 - 0
Sahil Farooq 1735 0 - 1
Ray Pallister 1580 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1509 = (6435 + 400 * (1 - 2)) / 4)

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