uperscript notation, with all possible values written in. There are three squares which contain only three values: 4, 6, and 8. If these numbers were written in any square where they are red, it would be impossible to complete the squares where they are blue. Therefore, the numbers in red can be erased.විශ්ලේශණය[සංස්කරණය]The two main approaches to analysis are "candidate elimination"[6] and "what-if".[7]Candidate elimination[සංස්කරණය]In "candidate elimination", progress  is made by successively eliminating candidate numerals to leave one choice for a given cell.  After each answer is found, another scan may be performed—usually checking to see the effect on contingencies.  In general, if entering a numeral prevents completion of other empty cells, then the numeral can be eliminated as a candidate. One method of candidate elimination works by identifying "matched cell groups".  For instance, if precisely two cells within a scope (a particular row, column, or region) contain the s