Tangled Sudoku Puzzles, with these four 9x9 grids, offer a central overlapping.
There is one grid less than in samurai sudoku, but twice more cells shared with two grids. A new difficulty liable to interest people fond of ordinary samurai puzzle. See below: Peculiarities of Tangled Sudoku Puzzles.
The rules are the same as for a classic sudoku. You need to find by deduction nine different digits by row, column and area for each 9x9 grid.
Each of our puzzles has only one solution. All our puzzles are solvable by a sequence of logical reasoning. No multiple choice or unfounded hypothesis is necessary to reach any solution.
You have 60,000 puzzles presented in two forms and three levels.
Forms: Symmetrical or asymmetrical.
Levels: beginner, confirmed and expert.
Choice of puzzles: Our Tangled sudoku were designed and graded so that at the same level, the higher the identification number of the puzzle, 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. Indeed, the symmetrical ones have an additional constraint, precisely be symmetrical, so they have fewer empty squares to solve. Also note that the aspect of difficulty is subjective, because different solving techniques suit different people.
Why play Tangled Sudoku Puzzles? A tangled sudoku is a variation of classic samurai sudoku. It allows veterans of samurai sudoku puzzles to find new visual configurations. The beginner and confirmed levels are solvable by logical deduction. Only the expert level requires you to pencil in the candidates if you cannot see the solution.
• Puzzles "Beginner" are fully resolvable by "Inclusion" while accepting other methods.
• Puzzles "Confirmed" are fully resolvable by "Inclusion" and "Exclusion" while admitting to other methods.
• Puzzles "Expert" are solvable by "Inclusion", "Exclusion" and "Pairs exclusive".
For more details on these three methods for resolution, identical to the regular sudoku, see: General help.
None of the four 9X9 grids of the Tangled Sudoku Puzzles can be solved separately. Indeed, some of the cells will only be solved through simultaneous deductive approach of two 9x9 grids.
The difficulty appears mainly at the beginning and middle of the game and disappears at the end.
A Tangled Sudoku Puzzles is symmetrical when the squares that compose it are arranged equally around the center known as the center of symmetry. This is only esthetic and does not change the resolution mode of the grid. Indeed it is the puzzle that is symmetrical and not the solution. However, the advantage of non-symmetrical puzzles is that, having one less constraint, they allow the elaboration of more difficult problems.
All Tangled Sudoku Puzzles of four grids offered on this site are created by the web site sudoku-puzzles-online.com and these puzzles can be reproduced free on condition that the link to the web site sudoku-puzzles-online.com appears on every reproduced page.