[r-t] Pitman's 13440 change compositions

Robin Woolley robin at robinw.org.uk
Thu Aug 10 10:28:07 UTC 2017

Hi all,

Searching my memory, I am reminded that this positional technique (of 
1,7,8) was the basis of Segar's document  on 'Blue Line Proof'. I don't 
know whether Segar came up with it himself or when this document was 
published but I obtained a copy of it in the 70s.

Best wishes

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