Event: 6 Board League

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Opponent Rating Result
Peter Shaw 2220 0 - 1
Dave Patrick 1871 ½ - ½
Gerard P Killoran 2065 0 - 1
Richard Porter 1924 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1920 = (8080 + 400 * (1 - 2)) / 4)

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