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Sudoku Solver Updated 14 June 2025for Android Read the update |
SudokuWiki.org
Strategies for Popular Number Puzzles
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| Logged out | Please report any bugs and feedback welcome |
| Killer Sudoku Solver | |
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Help on Killer Definitions used in this solver for transporting puzzles
Now updated and expanded!
Quick help: Using this Solver
You can pick examples from the list above. Click on Take Step to step through the solution. Unknown squares are filled with 'candidates' - possible solutions. Any cells that are reduced to one possible candidate are solved. You can enter a new Killer puzzle using the new 'designer' - click on "Enter new Killer". Once you fill in the clues and set up the cages correctly it can be solved. Unlike the other solvers you can only edit the main board when solving. The small board only displays the clues. |
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Welcome to this Killer Sudoku SolverKiller Sudoku solver has quite a complicated definition and I hope the method I've created to enter a puzzle works for most people. The independent 'Designer' handles the entering of the clues and cages. Keeping this separate and being able to (loosely) validate the entry should allow puzzle solvers a fairly quick way of setting up the puzzle for solving. I hope you agree and I'd love to hear your feedback. You should also be aware of the Killer Cage Convention. February 2025: I have adapted the solver to work with Killer puzzles where single (1-cell) cages are blank. However it will display a warning that it expects all cages to add up to 405. Three examples added to the example list. How to play Killer SudokuKiller is based on Sudoku, so ultimately you need to place the numbers 1 to 9 on all the cell so that 1 to 9 is unique in every row, column and box. However, you will have few, if any, completed cells in Killer. Instead, groups of cells form blocks or 'cages' - and the clue is the sum of the solutions to those squares. Each 'cage' is shown by a color or dashed line. A clue of '3' in a two-cell cage means those cells will contain 1 and 2 - but it won't be obvious which way round at the start of the puzzle.Combinations are key to this puzzle at the outset, but all Sudoku strategies still apply. Killer specific strategies have been highlighted in cyan in the strategy list. |
New: Version 2.36.4 (June 25th 2025) [Load Puzzle] I have been inspired by this Cracking The Cryptic video from a few years ago on solving Killer Sudokus to make the early strategies optional. If Simon here doesn't need a full candidate spread and Sudoku strategies (apart from one Quad) perhaps the solver does not. So now it is possible to turn of Pairs, Triples, Box Line Reduction, all the early Sudoku strategies (keep Quads on). And yes it can plough through. Under the hood I've increased the hit rate for Cage Unit Overlap. New: Version 2.36.1 (June 19th 2025) Added the Grader button. Feel confident this isn't going to be the CPU hog it once was. Added a Killer Cage Convention check and warning. New: Version 2.35.1 (May 31st 2025) Improved 'Hints Mode' next to Take Step. Choose between only revealing the next strategy, just the pattern or just the eliminations. New in version 2.31.4 (11th Feb 2025) Added Parity Strategy to the solver. New: Version 1.02 (June 13th 2009) Killer Sudoku Solver released |
