One of the solutions to this puzzle is shown in the illustration.
This puzzle was published in 1893 by Professor Hoffmann (Angelo John
Lewis) in his famous book "Hoffmann's Puzzles Old & New". Actually, it was
one of many puzzles based on the problem known as "the problem of the
eight queens". First proposed by Max Bezzel in 1848, general idea of this
problem is to place the largest number of queens on a chess board so that
no two queens are in the same row, column or diagonal. Later it was proved
that on a standard 8x8 chess board exactly eight queens can be placed so
that no two queens attack each other.