https://github.com/patryk27/nonogram-solver

Solves monochromatic nonograms, powered by Rust and Z3
https://github.com/patryk27/nonogram-solver

crossword nonogram nonograms puzzle rust sat z3

Last synced: 10 days ago
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Solves monochromatic nonograms, powered by Rust and Z3

• Host: GitHub
• URL: https://github.com/patryk27/nonogram-solver
• Owner: Patryk27
• License: mit
• Created: 2024-03-30T19:06:25.000Z (9 months ago)
• Default Branch: main
• Last Pushed: 2024-03-30T19:15:58.000Z (9 months ago)
• Last Synced: 2024-12-12T22:40:56.359Z (17 days ago)
• Topics: crossword, nonogram, nonograms, puzzle, rust, sat, z3
• Language: Rust
• Homepage:
• Size: 4.88 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# nonogram-solver

Solves monochromatic [nonograms](https://en.wikipedia.org/wiki/Nonogram),

powered Rust and Z3, pretty rudimentary.

## Usage

(requires rustup and z3)

``` 

$ cargo run -- \

     --cols '1|1|2|4|7|9|2,8|1,8|8|1,9|2,7|3,4|6,4|8,5|1,11|1,7|8|1,4,8|6,8|4,7|2,4|1,4|5|1,4|1,5|7|5|3|1|1' \

     --rows '8,7,5,7|5,4,3,3|3,3,2,3|4,3,2,2|3,3,2,2|3,4,2,2|4,5,2|3,5,1|4,3,2|3,4,2|4,4,2|3,6,2|3,2,3,1|4,3,4,2|3,2,3,2|6,5|4,5|3,3|3,3|1,1'

# https://en.wikipedia.org/wiki/Nonogram#/media/File:Nonogram_wiki.svg

```

```

******** ******* ***** *******

  *****   ****    ***    ***  

   ***     ***    **     ***  

   ****     ***   **     **   

    ***     ***  **      **   

    ***     **** **     **    

    ****     *****      **    

     ***     *****      *     

     ****     ***      **     

      ***     ****     **     

      ****    ****    **      

       ***   ******   **      

       ***   ** ***   *       

       **** *** **** **       

        *** **   *** **       

        ******   *****        

         ****    *****        

         ***      ***         

         ***      ***         

          *        *

```

## Implementation

Nonogram can be represented as a set of regular expressions - e.g. column with

numbers `1` and `8` is:

```

^[ ]*\*{1}[ ]+\*{8}[ ]*$

```

... or, with a couple of comments:

```

^ [ ]* \*{1} [ ]+ \*{8} [ ]* $

  1--- 2---- 3--- 4---- 5--- 

1 - any number of leading spaces

2 - exactly one asterisk

3 - at least one separating space

4 - exactly eight asterisks

5 - any number of trailing spaces

```

Following on this, nonogram-solver builds a regular expression for each column

and row, then sends those constraints to Z3 and parses its response back.

## License

Copyright (c) 2024, Patryk Wychowaniec, 

Licensed under the MIT license.