The home of Mind twister Sudoku software
This is performed from the outset and throughout the solution. Some of the easier puzzles can be solved by this method alone. It may be necessary to scan several times and consists of two basic techniques:
Cross-hatching:
This is performed by the scanning of rows or columns to identify which line in a region may contain a […]
There are two main approaches to analysis:
Candidate Elimination
One method of candidate elimination is to identify the ‘matched cells’. Cells are said to be matched within a particular row, column or region. If two cells contain the same pair of candidate numbers and no others, or if three cells contain the same three candidate numbers and […]
When no further numbers can be discovered scanning stops and from this point it is necessary to use logical analysis. Many players find it useful to help this analysis by marking candidate numbers into the blank cells. These can be divided into two notation types:.
Subscripts
In the subscript notation the candidate numbers can be written in […]
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