Event: Division Three

Opponent Rating Result
John Phillips 141 ½ - ½
David Jarvis 118 0 - 1
Dave Brelsforth 111 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-10 = (370 + 400 * (0 - 1)) / 3)

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Opponent Rating Result
R Arthur Hall 106 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

106 = (106 + 400 * (0 - 0)) / 1)