Never used in production, just cannot see how it would work. Use it for random puzzles like http://chris-lamb.co.uk/2010/07/24/four-men-mine/ http://chris-lamb

Never used in production, just cannot see how it would work. Use it for random puzzles like http://chris-lamb.co.uk/2010/07/24/four-men-mine/ http://chris-lamb.co.uk/2010/07/24/four-men-mine/ though