Screen capture of my WqGStep2.exe program
on its way to finding all  2,279,184 solutions
for the N-Queens 15 x 15 puzzle

My WqGStep program solving the 15x15 board
On a modern home PC (in August 2010), this WqGStep2.exe program will take just 1 minute to find all  2,279,184  solutions for the N-Queens 15 x 15 puzzle.  It will find the first possible 15 x 15 solution almost instantly.
This program has not been especially optimised, and I claim no records for speed!

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This page was written originally using KompoZer CSP Queens - Analysis Of The N-Queens Puzzle © 1975 by Colin S Pearson and Martin S Pearson
is licensed under CC BY-NC-SA 4.0
Permissions beyond the scope of this license may be available via the feedback page. 		Page updated:  14 July 2025