[Retros] Eero Bonsdorff - 80

Joost de Heer ildjarn666 at hotmail.com
Tue Jun 4 15:11:36 EDT 2002

> >what *is* a mathematical chess problem?

> this is a sample ...

> http://www.cs.utexas.edu/users/xli/prob/p10/p10.html

Another nice example is: http://janko.at/Retros/Schwalbe/N172.htm#10106


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