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The post 20 Printable Sudoku Puzzles to Test Your Smarts appeared first on Reader's Digest. You want to start with the easy ones, but if you're an expert, you can skip to the extra hard puzzles.
A Sudoku whose regions are not (necessarily) square or rectangular is known as a Jigsaw Sudoku. In particular, an N×N square where N is prime can only be tiled with irregular N-ominoes. For small values of N the number of ways to tile the square (excluding symmetries) has been computed (sequence A172477 in the OEIS). [10]
Puzzles constructed from more than two grids are also common. Five 9×9 grids that overlap at the corner regions in the shape of a quincunx is known in Japan as Gattai 5 (five merged) Sudoku. In The Times, The Age, and The Sydney Morning Herald, this form of puzzle is known as Samurai Sudoku.
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Sudoku. Completely fill the 9x9 grid, using the values 1 through 9 only once in each 3x3 section of the puzzle. By Masque Publishing
A nonomino or Jigsaw Sudoku puzzle, as seen in The Sunday Telegraph. A nonomino (or enneomino or 9-omino) is a polyomino of order 9; that is, a polygon in the plane made of 9 equal-sized squares connected edge to edge. [1] The name of this type of figure is formed with the prefix non(a)-.
Minimum Su Doku [4] – The class of puzzles which have the minimum number of clues needed to allow a complete and unique solution, i.e. minimal Sudokus. Jigsaw Sudoku – Regular 9×9 Sudoku that row and column rules apply, but instead of a 3×3 grid they are nine Jigsaw shapes.
Mechanical puzzles or dexterity puzzles such as the Rubik's Cube and Soma cube can be stimulating toys for children or recreational activities for adults. combination puzzles like Peg solitaire; construction puzzles such as stick puzzles; disentanglement puzzles, folding puzzles; jigsaw puzzles. Puzz 3D is a three-dimensional variant of this ...
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