[Retros] More Than Three, Less Than Five

[Joost de Heer]

On 03/23/2010 04:56 PM, Николай Белухов wrote:

>   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


#19 has a wrong diagram.

Joost