Event: Silver Rook

Opponent Rating Result
Richard White 0 ½ - ½
Zak Lipman 0 ½ - ½
Murray Purkis 0 1 - 0
Andrew Zigmond 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

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

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Opponent Rating Result
Greg Billenness 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-400 = (0 + 400 * (0 - 1)) / 1)