Event: Division Four

Opponent Rating Result
Derek A Stockhall 1578 ½ - ½
Christopher J Evans 1736 ½ - ½
Chris W Pitt 1600 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1771 = (4914 + 400 * (1 - 0)) / 3)

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