12/7/2023 0 Comments Best sudoku strategyThis is an early 'ultimate puzzle' but this crown has been usurped by the puzzle created by Arto Inkala, which is also in the example list. With the community's help I hope to extend the documentation here.įor those people wondering why " Escargot" cannot be solved by the solver, there is an article on this special Sudoku here. If you are interested in the concepts behind creation and grading, there is a PDF document here called Sudoku Creation and Grading. Many strategies can be further extended and we do not have a complete theory of all Sudoku puzzles. This strategy list is by no means complete. Crosshatching is the first strategy any Sudoku player can apply when facing a Sudoku grid. These are now included for the first time on this site. 8 Sudoku strategies for beginners explained 1. There are naturally special strategies for Jigsaw and Killers because of their differences. They are definitely worth presenting as a demonstration of people's ingenuity but you will only need to have recourse to them on the extreme puzzles. Similar to the X Wing strategy, Y Wings involves identifying a particular pattern of candidates in the grid but unlike X Wing, it only involves. This is why it’s known as a candidate eliminator strategy. Do read the introductory articles Introducing Chains and Links and Weak and Strong Links.Įxotic strategies do overlap with chaining ones, but they have a peculiar flavour of their own and some wonderful, if obscure, logic. Y Wings are a fairly advanced Sudoku solving technique that allows you to eliminate candidates in particular rows or columns of the grid. Thus, for example, Remote Pairs are a subset of XY-Chains that is, XY-Chains is a more general approach of which Remote Pairs are a specific instance. You will find, if you read through this group, that earlier strategies become part of a more general theory as the theme develops. This theme is all about bi-value (only two candidates left in the same cell) and bi-location (only two occurrences of a particular candidate left in the same unit) pairs and the incredible number of deductions one can make from them. With chaining strategies, there is definitely a theme going through them.
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