One of the things I did in Prague – more info shortly, promise – was buy a really cheap copy of River Crossing (called 'Crocodile [something]' there).
And being the sort of person whose response to Sudoku was to write a program to solve the puzzles (starting with one that would do 16×16 ones as well as 9×9) I've written a program to find solutions to this too.
(Ok, one incentive was being a bit stuck on puzzle 38 of the 40 in the box. The solutions are included, but that feels like cheating in a way that writing the solving program doesn't.)
It works 🙂 but several things have surprised me… Continue reading