For this week, you can just hit the solved button on an honor system if you think you’ve solved it. Or solve online (using our beta test of Penpa-Edit tools)Īnswer String: For the USSQT, the answer strings were a set of rows/columns encountered late in the puzzle. Gradually a duplicated puzzle came into form.Įnjoy what were probably my favorite puzzles from the USSQT.
#ARROW SUDOKU RULES SOFTWARE#
As I got some other good logical placements worked out, I did use some software tools to confirm each puzzle still had possible solutions before going too far down a dead-end.
The 1’s in the corners were also great clue digits for both Arrow and Thermo types for different reasons. The intention of having the centers work quite differently in the two types made the first four givens in the center the start. Here I simply did this at the same time for two different styles. I normally design both of these styles by hand starting from an image of the shapes and then slowly adding digits. Some people have asked about the construction steps to get two working puzzles of very different types. Of course, almost all the remaining digits differ but I guess that is the point. Fortunately there were a good set of symmetric positions that still matched with digits so I could add clues to both puzzles without spoiling the theme. Counting the solutions A completed sudoku grid is a solution to the above puzzle if and only if the highlighted cells in the diagram below all contain the same digit. The arrow is probably a much better challenge as a result, but the Thermo is at the very high end of the difficulty scale and better for a slow solve than a competition solve. Each of the shaded regions must also contain each digit from 19 exactly once. Additionally the number placed in a cell with a circle must be the sum of the numbers placed in cells the adjoining arrow passes through. The theme here speaks mostly for itself.īut if you want an extra challenge I’d recommend solving from these images ( Arrow / Thermo) or PDFs ( Arrow / Thermo) which contain the original draft of the finished puzzle. To Solve Arrow Sudoku, Classic Sudoku Rules apply. The goal was simple: can I make one puzzle that solves both ways depending on the type of shape placed into the grid.
Numbers can repeat within an arrow shape.
Some arrow shapes are in the grid the sum of the numbers along the path of each arrow must equal the number in the circled cell. This puzzle was inspired by a comment I read somewhere of someone stumbling on a Thermo-Sudoku by solving it for awhile as an Arrow (or vice-versa, I can’t remember exactly). Rules: Standard Sudoku rules (insert a number in the indicated range into each cell so that no number repeats in any row, column, or bold region). Thank You to Our Grandmaster Supporters.
#ARROW SUDOKU RULES FREE#
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