Really fun visualizations. Well done! I am a broken record on posts that mention sudoku in bringing in Knuth's treatment of it. He has a ton of really fun ex

Really fun visualizations. Well done! I am a broken record on posts that mention sudoku in bringing in Knuth's treatment of it. He has a ton of really fun exercises on the game in the latest volume. Perhaps the most fun are the puzzles that have a single solution, but do not have enough information to place a single piece without ambiguity.