Event: Dave Welch 7200 League

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Opponent Rating Result
Peter J Mulleady 1968 0 - 1
Luke S Boumphrey 1981 0 - 1
Bashar Rovezi 1975 1 - 0
Shay Hanlon 1707 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1908 = (7631 + 400 * (2 - 2)) / 4)

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