Event: Division 1

Opponent Rating Result
Jonathan A Tait 2180 ½ - ½
Florian Biermann 2052 1 - 0
Peter J Mercs 1982 ½ - ½
Tim D Walker 2114 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2082 = (8328 + 400 * (1 - 1)) / 4)

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