Professor Ian Gent and Dr. Peter Nightingale challenge computer programmers to find a solution to a “simple” chess puzzle. Source: University of St AndrewsProfessor Ian Gent and Dr. Peter Nightingale challenge computer programmers to find a solution to a “simple” chess puzzle. Source: University of St Andrews

Computer programmers with a knack for chess, take heed. Researchers at the University of St Andrews, Scotland, are seeking a solution to the Queen’s Puzzle, first posed in 1850.

The puzzle originally challenged a player to place eight queens on a standard chessboard so that no two queens could attack each other. One queen must be placed in each row, so that no two queens are in the same column and no two are in the same diagonal. This has been solved by human beings, but once the chess board increases to a large size, no computer program can solve it. The researchers note that computer programs cannot cope with the vast number of options once the chess board reaches 1,000 squares by 1,000.

The financial rewards for solving the puzzle are fit for a sovereign, as the researchers suggest that the solution will be of great interest to cyber security firms and others. Oh, and there’s also the $1 million prize offered by the Clay Mathematics Institute in Peterborough, N.H.

Dr. Peter Nightingale of the university’s School of Computer Science offers a sobering comment: “However, this is all theoretical. In practice, nobody has ever come close to writing a program that can solve the problem quickly. So what our research has shown is that—for all practical purposes—it can’t be done.”

To contact the author of this article, email shimmelstein@globalspec.com