Event: 6-Board Division 2

Opponent Rating Result
Derek A Sheppard 1715 ½ - ½
Chris J Matthews 1822 0 - 1
Keith Porteous 1673 0 - 1
Trevor Harper 1773 0 - 1
David J Hambly 1803 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1437 = (8786 + 400 * (0 - 4)) / 5)

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