Event: Dave Welch 7200 League

Opponent Rating Result
Michael I Connor 1786 0 - 1
Sanjoy K Banerjee 1733 0 - 1
Brendan D Kane 1857 0 - 1
Kevin A Sartain 1778 1 - 0
Craig Gradden 1673 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1685 = (8827 + 400 * (2 - 3)) / 5)

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