![]() These two candidates of dissimilar colors are disinterested, and we don’t know them. In this criteria, only one color will be the solution for two candidates who “sees” another Candidate if they both have a place in the same region. SIMPLE COLORING (See more than one dissimilar color): The green stage will suffice if the yellow stage fails to provide a solution. However, if cells in yellow recognized the answer, this is unlikely.Īs a result, yellow-colored candidates are unable to be the correct answer in their respective cells. Let’s say candidate 2 has double the yellow color in this image’s Row “D.” Candidate 2 could be the answer in these two new cells in Row “D.” As a result, the solution takes on a new hue. This occurs because a candidate can’t be the answer for two cells in the same region.Īs a result, all applicants with this color may be excluded. This color can’t be the solution if two Nodes in this sudoku Chain have the same color and fit into the same area (Column, Row, or Square). SIMPLE COLORING – More than once in a unit: So, unless all contenders of a similar hue are the answer at the same moment, they will not be the response. This is because one of the candidates is only present in one of two states. This approach looks at such sequences and displays those using colors that correspond to their names. If we imagine a longer Chain with just Strong Links, the Nodes will move from one state to another. If we assume that the candidate in the Cell at one end of a Chain is the response for that Cell, it will never be the solution for the middle Cell hence it must be dismissed. It has to be a good answer for the Chain’s next Cell.Īs a result, for the same reason, the candidate cannot be the resolution for the third Cell in the Chain. This is not the explanation for that Cell, which is the concept of a Strong Link that requires the candidate in the Cell at one end of the Chain. We can create a Chain of three Cells by placing the mutual Cell in the middle of two Strong Links that share a Cell. These two Cells are the only ones in the region where a single candidate is generally found.Īssume that if this candidate is not the resolution for Cell 1, it is the resolution for Cell 2, and vice versa. It’s not a panacea like Tabling or Nishio but it is easier to do and will work better if you are down to your last twenty or so unsolved squares.A Strong Link is a connection between two cells in a Sudoku region or area. The solver worked it out, the most advanced strategy being used is "3D Medusa", really impressive.īowman’s Bingo doesn’t solve all ‘bifurcating’ Sudokus but if applied thoroughly it will crack more than 80% of them. I tried it by importing a Sudoku picked from the "very hard" level of a Android Sudoku App, on which I stuck quite a while. There's a online Sudoku solver, solving problem like a human (rather than a computer) with the following strategies. I heard some researcher accidentally found that their algorithm for some data analysis can solve all sudoku. How can a human being solve the so called "the hardest sudoku in the world", does he need to guess? Let us say the we know the solution is unique, is there any algorithm that can GUARANTEE to solve it without backtracking? Backtracking is a universal tool, I have nothing wrong with it but, using a universal tool to solve sudoku decreases the value and fun in deciphering (manually, or by computer) sudoku puzzles. Traditional sudoku means 81-box sudoku, without any other constraints. ![]() Here Guessing means trying an candidate and see how far it goes, if a contradiction is found with the guess, backtracking to the guessing step and try another candidate when all candidates are exhausted without success, backtracking to the previous guessing step (if there is one otherwise the puzzle proofs invalid.), etc. Is there any algorithm that solves ANY traditional sudoku puzzle, WITHOUT guessing?
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