Abstract

The explicit solution for the n–queens problem, mentioned in a letter from Bo Bernhardsson [2], is basically Pauls's solution analyzed by Ahrens (See reference [1] of our previous article in SIGART October issue 1990). The result was in public domain long before 1918 (not 1969). We also mentioned its weakness, namely: The class of solutions provided by analytical methods is very restricted, as Ahrens pointed out in [1]. They can only provide one solution for the n –queens problem and can not provide any solution (much better explicit solutions for the n –queens problem exist). This is not the case for search methods which can find, in principle, any solution. This distinction is crucial for practical applications of the n -queens problem.

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