Event: Division Four

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Opponent Rating Result
Chris W Pitt 1640 1 - 0
Stephen Gaskell 1603 ½ - ½
Larry Wright 1815 ½ - ½
Nigel Foster 1622 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1870 = (6680 + 400 * (2 - 0)) / 4)

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