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License: Other
Simple sudoku solver using reduction to boolean satisfiability (CNF) and MiniSat in Haskell.
License: Other
Sudoku solver using reduction to boolean satisfiability (CNF) and MiniSat to solve - written in Haskell. A full description of the approach can be found here: http://www.lukedodd.com/?p=5 The only dependency in addition to MiniSat is the Data.List.Split, install with cabal: $ cabal install Split A MiniSat binary, version 2.2.0, built on 64-bit linux (ubuntu 10.4) is included. You can replace this with your own. See http://minisat.se/. An example puzzle file is included in "puzzles", the format should be self explanatory. This contains 50 sudoku puzzles - it is from http://projecteuler.net/. The file "harder-puzzles" contains harder sudoku problems. This solver performs well on these instances, where other simple solvers may perform very slowly. The solver also identifies unsolvable puzzles quickly. === Compile and Run === To compile: ghc sudoku.hs Run the solver by passing it a puzzle file in the first argument. i.e. $./sudoku puzzles The solver expects to find "minisat" in the working directory.
I get the following error.
ghc sudoku.hs
[1 of 1] Compiling Main ( sudoku.hs, sudoku.o )
sudoku.hs:80:22: error:
Variable not in scope: delete :: Integer -> [Int] -> t1
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