Event: Doncaster League

Opponent Rating Result
Alan J Smith 128 0 - 1
Tim Prosser 143 0 - 1
Binali Yilmaz 85 ½ - ½
Steven R Brooks 115 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-82 = (471 + 400 * (0 - 2)) / 4)

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Opponent Rating Result
Alan J Smith 128 ½ - ½
Gerald R Thickett 109 ½ - ½
Nicholas Mahoney 138 0 - 1
Alan J Smith 121 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

24 = (496 + 400 * (0 - 1)) / 4)