And therefore the correct solution would be the other candidate.īecause this process can be seen as ‘guessing’, it can have a bad reputation in the Sudoku community. If they run into an issue (such as the same number appearing twice in the same row or column) then they know they must have picked the wrong number.
While it may be theoretically possible to reduce the two candidates down to a single number through some highly advanced (or even undiscovered) solving technique, most advanced Sudoku solvers will instead turn to bifurcation.īifurcation is the process of choosing one of these two remaining candidates for the particular cell and seeing if it’s possible to complete the Sudoku without running into an issue. There will be times with very challenging puzzles where there is only one remaining pair of numbers that are candidates for a particular cell. Sudoku guessing vs bifurcation or brute force Where the answer begins to get complicated is when you take into account bifurcation or solving a puzzle through brute force. Even though it may require highly complicated solving techniques you’re not familiar with.
Every proper Sudoku puzzle can be solved without ever having to make a guess.Īnother way of thinking about it is that every Sudoku puzzle can be solved logically. Can all Sudokus be solved without guessing? So let’s take a look at whether you ever have to guess to solve a Sudoku puzzle. So it might seem strange that in a puzzle all about logical deduction, you’d have to make guesses.
Guessing however is hardly a logical solving technique.
#ARROW SUDOKU SOLVER SERIES#
Solving Sudoku puzzles involves making a series of logical deductions to arrive at a unique solution.īut, after having played Sudoku puzzles, you likely have found yourself in situations where you feel like you have no choice other than to guess.
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