Event: Div4

Opponent Rating Result
Shah Hussain 114 0 - 1
R Arthur Hall 109 ½ - ½
John E Fryer 113 ½ - ½
Fred Biles 102 1 - 0
Danny Torbica 95 0 - 1
Nigel D Marshall 113 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-26 = (646 + 400 * (1 - 3)) / 6)

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