Sudoku Solver
Version 2009-04-26 (by Cédric Dufour - http://www.ced-network.net) - See source code for Javascript details
NOTE: in Internet Explorer, you may need to allow the "Blocked Content" for the solver to work (watch for the top "Information Bar")

 
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MATRIX: CLEAR · SAVE · RECALL · SOLVE !
ALGORITHMS:  Singles
A singled-out value in a box/row/column is a solution
   Outter Exclusions
Values which appear only in one row/column within a box cannot appear in any other box on the same row/column
   Inner Exclusions
Values which appear only in one box per row/column cannot appear anywhere else in the same box
   Groups (pairs, triplets, ...)
Values which can be grouped as pairs/triplets/... in a box/row/column cannot appear anywhere else in the same box/row/column
   Recursion
Eventually, when everything else fails, try brute force!
PROGRESS: Delay [ms]:  (-1 for manual step)
   = New solution
Which then eliminates itself from the related box/row/column...
   = Indirect new solution
Which in its turn eliminates itself from the related box/row/column...
   = Modified but still undetermined