Event: Silver Rook

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Opponent Rating Result
John K Holliday 141 1 - 0
Paul Gelder 121 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

131 = (262 + 400 * (1 - 1)) / 2)

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Opponent Rating Result
Michael A Fox 122 0 - 1
Ranyl W Hughes 88 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-95 = (210 + 400 * (0 - 1)) / 2)