Friday Puzzle #141 - The Art of Sudoku - Sample #2
One new trick I've been using recently in constructing is something I learned from creating Just One Cell Sudoku. Basically, the steps you take to hide a very clean logical deduction that only gives one new cell can be used for a whole puzzle provided you are very careful that no easier moves are possible and can work backwards from that cool state. This week's sample is one of the harder puzzles in the book, but hopefully showcases what a good handcrafted puzzle can feel like at the higher difficulty levels.
Rules: Place a single digit from 1 to 9 into each cell so that no digit repeats in any row, column, or bold 3x3 region.