Sometimes, especially on the Easy-rated Sudoku puzzles, you can quickly use. Usually this is where there is a crowded square or a row that is almost full of numbers. Right angles give you a lot of information regarding the empty columns and rows in the cell they’re in, which can help you cancel out incorrect candidates in the adjacent cells. Look for the easy play first: When you first start to play a Sudoku puzzle, look for where you have the easiest opportunities to add a number. Right angles (any 3 given numbers in an L-shape inside of a cell).This pattern can help you isolate rows and columns to solve entire rows or columns of the puzzle. Skyscrapers (two rows or columns of a given candidate that are unequal in length). The Sudoku Assistant uses several techniques to solve a Sudoku puzzle: cross-hatch scanning, row/column range checking, subset elimination, grid analysis,and what Im calling 3D Medusa analysis, including bent naked subsets, almost-locked set analysis.Use the first few techniques to insert as many numbers as you can. When utilizing these techniques, the way the pros prefer to do it, is to start with the basic ones. This article presents nine such techniques in increasing difficulty. Revisit these regularly to make sure you don’t provide a false solution. Solving a hard Sudoku puzzle will require quite a different set of techniques compared to an easy one. Corner patterns help eliminate a ton of potential candidates in the rows and columns connected to it.
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