Event: Division Five

Opponent Rating Result
John B Lewis 99 0 - 1
Peter Yarnell 0 ½ - ½
Joshua Sawyer 0 ½ - ½
Joyce H Evans 52 1 - 0
David I Buckley 80 0 - 1
Mehdi Mahmoud 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

39 = (231 + 400 * (2 - 2)) / 6)

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