Symmetrical and asymmetrical puzzlesĪn irregular jigsaw puzzle is symmetrical when the squares that compose it are arranged equally around the central square known as the center of symmetry. Number of multiple choices in extreme asymmetrical puzzles :įrom 1 to 19 multiple choices are possible, in proportion with the puzzle number.Įxtreme asymmetrical puzzles with the highest numbers are the most difficult to be solved and just proposed as a 'curiosity'.įor more details on these techniques similar to those of regular sudoku, see: General help. Number of multiple choices in extreme symmetrical puzzles : Puzzles ' Extreme' are solvable by ' Inclusion', ' Exclusion', Pairs exclusive' and ' Multiple choices'.Puzzles ' Expert' are solvable by ' Inclusion', ' Exclusion' and 'Pairs exclusive'.Puzzles ' Confirmed' are fully resolvable by ' Inclusion' and ' Exclusion' while admitting to other methods.Puzzles ' Beginner' are fully resolvable by ' Inclusion' while accepting other methods.Only the expert level requires you to pencil in the candidates if you cannot see the solution. The beginner and confirmed levels are solvable by logical deduction.

It allows veterans of sudoku to find new visual configurations. Why play irregular sudoku? Irregular sudoku is a variation of sudoku.

Also note that the aspect of difficulty is subjective, because different solving techniques suit different people. Indeed, the symmetrical ones have an additional constraint - precisely to be symmetrical - so they have fewer empty squares to solve.

Choose a random puzzle:Ĭhoice of puzzles: Our irregular sudoku were designed and graded so that at the same level the higher the puzzle number, the more difficult the solution, with this nuance that in our classification, at equal levels and numbers, symmetrical puzzles are a little easier to solve than asymmetrical ones.

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