If c7r2 is instead the 7, then c8r3 is also not a 7.Although xy chains typically rely on bivalue cells and strong Press J to jump to the feed. If c7r6 (column 7 row 6) is the 7, then c3r5 is a 7, making c1r9 a 7, making c6r8 a 7, making c4r3 a 7, making c8r3 NOT a 7. To solve a Sudoku puzzle you need to understand how the rules work. Most comprehensive sudoku strategy for tough puzzles : sudoku The first strategy that comes to mind for me would be something like an xy chain.There are 2 possible locations for a 7 in this column: This subreddit is for learning about and discussing the puzzle Sudoku and variants.
SUDOKU STRATEGY REDDIT HOW TO
This book is full of new Sudoku puzzles to try, plus a dedicated chapter explaining how to solve Sudoku puzzles, plus a detailed list of Sudoku puzzle answers at the back of the book. Then I look if either of those lead to some contradiction, or both options lead to the same value, or disallow some value in a square.īriefly looking at your puzzle I found a way to progress doing this: look at the 7th column. If you’re new to playing Sudoku, there’s no better place to start than with Sudoku for Dummies. Whenever I force chains I look for places where there are two options: either 2 options in some individual cell, or more frequently 2 places where a number can be placed in a row, column, or box. SudokuSolver Forum Not as fun to use as reddit but. The basic concept is that you posit that a number is in a given box, and figure out what that would imply about the rest of the puzzle. reddit Sudoku Forum A great place for discussing Sudoku or getting help for solving puzzles. As someone who learned how to solve extremes last week, something that helped me go from being completely unable to solve extreme puzzles to being able to get them without errors almost 100% of the time was learning how to force chains.
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