Event: OTB Knockout

Opponent Rating Result
Mark Le Gassicke 1338 1 - 0
David Spearman 2103 ½ - ½
Peter A Nickals 1705 1 - 0
Ashley Freeman 1966 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1878 = (7112 + 400 * (2 - 1)) / 4)

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