[Retros] More Than Three, Less Than Five

[Николай Белухов]

 Dear retro-friends,
Here is one very interesting article by 
grandmaster Alexander Kislyak on the mystical properties of the number 
four in connection with retroanalysis. Alongside some curious numerology
 (or mathematics?) the article contains many beautiful problems of 
rather varying difficulty, from very easy to very complex. It was 
translated by Andrey Frolkin who kindly gave his permission for his text
 to be published. The file also contains some biographical 
notes on Mr. Kislyak and his involvement with retroanalysis.
Links:
http://chessproblem.net/viewtopic.php?f=10&t=384
or
https://docs.google.com/fileview?id=0B84M-EsbAvopNTVjYjY3YjktYjEyMi00MjlkLTk4MWQtYWE0OWY3MDQ4NTZh&hl=en
Have a 
nice read,
Best wishes,
Nikolai
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