SudokuService

Sudoku-as-a-service!

Made from:

• Julia, a fantastic up-and-coming language,
• JuMP, an algebraic modelling language for (integer) linear programming,
• HttpServer.jl, an HTTP server package for Julia made at Hacker School,
• COIN-OR CBC, an open-source integer programming solver.

This project is mainly for demonstration purposes. While you could probably solve sudoku problems faster with a dedicated solver, I wanted to show that it was

• Easy to get a server up in Julia, without much web development knowledge, and
• You can solve complex optimization problems using external solvers behind a web interface.

To run it for yourself:

• As far as I know, Windows isn't supported yet by HttpParser, so you need to be on OSX or Linux.
• Clone the repository
• Install Julia 0.2 (see site for instructions)
• Add the required packages:
• julia -e 'Pkg.add("HttpServer")'
• julia -e 'Pkg.add("JuMP")'
• julia -e 'Pkg.add("Cbc")'
• Launch the server: julia server.jl
• Navigate to the server in your browser:
• Requests should be of the form /sudoku/123...123 or /sudoku/123...123/pretty for human-readable response
• There should be 81 numbers, one for each cell of the 9x9 sudoku board, row-wise. A zero indicates a blank.
• Examples:
• http://localhost:8000/sudoku/31005800400.../pretty will return a human readable HTML table
• http://localhost:8000/sudoku/31005800400... will return a string of 81 numbers representing the solution