 |
Sudoku Solver Updated 3rd June 2025for Android Read the update |
SudokuWiki.org
Strategies for Popular Number Puzzles
|
| Logged out | Please report any bugs and feedback welcome |
| Killer Sudoku Solver | |
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
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. |
|
|
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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. |
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 in version 2.30.1 (20th Jan 2025) Internals update. See version history New in version 2.29.2 (7th Jan 2025) Swapped the strategy order in the following way: moved 1 cell innies/outies up one; moved cage/unit overlap up one. Added an addition pattern to look for in cage/unit overlap New in version 2.28.1 (14th Nov 2024) New Packed String Definition and transport scheme New in version 2.26.4 (5th August 2024) New addition to Innies and Outies. This has prompted me to recalibrate the scoring. I've noticed that simple pair combinations for 2-cell cages rarely get evaluated unless there is only one combination. The so-called "killer combinations (easy)" in the solver. Moving the 2-cell from the "killer combinations (hard)" to the "easy" has changed scores a good deal and I need to restock the player and reset the calibration. This change avoids mid-level strategies being applied to 2-cages which on the face of it ought to have been reduced earlier with quite obvious pair combinations. I'd be interested if people think the 9x9 Killer puzzle has got harder or easier from tomorrow onwards. New in version 2.24 (July 2024) Better New/Modify Killer designer which now remembers partially designed puzzles. Added import from a string definition. New in version 2.13 - 2.16 (May 2024) Added the ability to transport a Killer puzzle in progress with all the solved cells and candidates. Available in the [Email this Board] button. New in version 2.16 (October 23th 2023) Important update thanks to JohnNoneDoe who supplied an example, I have improved the Innies and Outies strategy. Particularly outies which he observed, do not need to obey the Dog-leg restriction on the pseudo-cell they create. This improvement has a large effect on hard Killers improving the hit rate (I hope). I have also changed how a block displays so as not to override the cell colours. New in version 2.09 (October 25th 2022) Made cells with incorrect numbers look better and moved popup alert to results box; new catch for cages not adding up to the clue. New in version 2.06 (September 8th 2017) For Naked Pairs in a cage I've added the case where the two cells are diagonally positioned. New in version 2.03 (August 29th 2015) Killer Cage Convention will now clear off candidates in 'dog-leg' cages early in the list of checks - as and when solution numbers are found. New in version 1.91 (October 16th 2012) Re-wrote the Innies/Outies algorithm to look for innies with more than one cell covering several sticking-out cages. Re-ordered the strategies to balance them against new calibrations. Added Cage Comparison to the killer strategies. New: Version 1.02 (June 13th 2009) Killer Sudoku Solver released |
