I hope you’ve found this helpful! If you have any questions or feedback, please feel free to leave a comment or reply to an Artisanal Sudoku email. If you’ve been following along, you should be able to solve the puzzle from here using nothing more fancy than regular sudoku and simple arithmetic (keep scrolling to see the solution). a two-cell 8-cage can never contain a 4). How to solve Videos Forum Timed Rankings Books PDF Print. All these puzzles have a single unique solution. The booklets are ordered by ascending difficulty - the puzzles in book 100 are much harder than the puzzles in book 1. If N is greater than 10, the lowest digit that can appear in the cage is N-9. Online Killer Sudoku Puzzles, from easy to hard, solvable online for points & printable. Each booklet contains a collection of eight different puzzles, 1-per-page, with a page of answers in the back. If N is less than 10, the highest digit that can appear in the cage is N-1. Compatible with all browsers, tablets and phones including iPhone, iPad and Android. If N is even, the cage must contain two digits with the same parity. If N is odd, the cage must contain one odd digit and one even digit. Similarly, a two-cell 10-cage needs one low digit (1-4) and one high digit (6-9), and the only available low digit in box three is 4.Ī few more things that are always true about two-cell cages (assuming standard rules, of course), where N represents the sum: The 9-cage in box one sees a 2 and 4 in its box and a 1 in its column, so its low digit must be 3, which must be accompanied by 6. Once you have a few digits placed, there are plenty of logical shortcuts available to help resolve even the most average-seeming cages.įor example, a two-cell 9-cage must contain exactly one low digit (1-4) and exactly one relatively high digit (5-8). Nodes:2 3 4 8 14 14 20 14 4 4 4 4 4 2 4 7 3 3 2 2 1 1 1 1 1, 4 ticksĮrrrrr.This one’s pretty vague-apologies!-but the idea I’m getting at is that you don’t have to be a supercomputer to solve killer sudokus. The computer solves it with rather few nodes in only 4/18 seconds : Ce niveau de difficulté est ainsi réservé aux experts du sudoku à la recherche de nouveaux défis. You can solve these as an exact cover problem generating all the NOTE: This solver reported one and only one solution to the puzzle I posted previously, though that puzzle has two additional solutions if you ignore the 'no duplicate digits in an enclosure' rule. It took only a 10 or 15 seconds to solve one I posted in another thread ( but it took many minutes to solve the 'Deadly' one here: Most importantly, once you have a few numbers in, don't forget to use the normal sudoku tehniques too! PaulIQ164 Posts: 533 Joined: 16 July 2005 That means next to it must be a 7, and you can place the 1 and the 2 in the 3-enclosure at the top. Remplissez toutes les lignes, colonnes et blocs de 3x3 cases des chiffres de 1 à 9, comme dans le sudoku classique. And you can't have two 8s next to each other. But notice that it and the cell to the left of it have to add up to 16. So the one at the bottom must be a 9 or an 8. The one at the top, as mentioned, must be a 1 or a 2. You'ce got a big huge bar in the middle 7 cells that totals 35, so the cells at the top and bottom must add up to 10. One more example (yes, OK, now I'm just doing this for my own benefit). But you already have a 1 and a 2 in the top-middle box, so the part of the L that's in this box must be the 3.

Now look at the L-shape enclosure totalling 6 that just pokes its head into this box. Each digit in the cage must also be unique. The rules for regular Sudoku apply, with one additional rule: The sum of the cells in a cage must equal the total given at the edge of each cage.

There's a 2-cell enclosure that totals 3, so it must contain the 1 and the 2 in some order. Posted by krist on 1 November 2023, 1:24 pm. So, as an example, look at the top-middle box in today's puzzle (Box 2). However, tso, who knows a great many things about stuff like this, assures us that it's an oversight on The Times' part, and it is in fact a rule that the no dotted enclosure can hold the same number twice. The Times have never specifically stated that this can't happen, though their stated rules sort of implied it. Since the entire row must total 45, and the two bars of four together total 40, you know that the central cell must be a 5.Ī controversial topic that you mention is the possibility of repeated numbers in an L-shaped enclosure. So, if you look at the Killer in today's times2, and look at the middle row,you'll see it consists of a bar of four cells adding up to 10, another adding up to 30, and one extra cell (the one in the very centre). A simple trick to remember is that, since every row, column and box in a sudoku puzzle must contain 1 to 9, every row, column and box must logically add up to 45 (1+2+3+4+5+6+7+8+9). Right, I'll get through as many things as I can think of:įirst, this should really be in the Times forum, but never mind.

Killer sudoku answers