Event: Derbyshire Individual

Opponent Rating Result
Colin Ross 117 ½ - ½
Stephen G Wootton 127 0 - 1
Mohinderpal Samra 87 0 - 1
Andrew Stevens 154 0 - 1
Norman W Parkin 105 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-42 = (590 + 400 * (1 - 3)) / 5)

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