Event: Div4

Opponent Rating Result
John Moughtin-Leay 76 1 - 0
Shaun Walsh 94 0 - 1
Harry Ayto 0 0 - 1
John Moughtin-Leay 76 0 - 1
Nigel D Marshall 113 1 - 0
Matthew Caswell 105 0 - 1
Allan Doyle 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-105 = (464 + 400 * (2 - 5)) / 7)

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