Daily new Calcudoku Puzzles. Like Sudoku: fill the grid where every number can only occur once per row/column. But the cages (thick bordered box) must produce the given outcome with the given operator.
CalcuDoku are math and logic puzzles which require placing numbers in a grid according to the rules. Each puzzle consists of a grid containing blocks surrounded by bold lines.
Calcudoku ("KenKen", "KENKEN", "KenDoku", "Mathdoku", "Square Wisdom") is a mathematical and logical puzzle loosely similar to sudoku. It was invented by a Japanese mathematics teacher Tetsuya Miyamoto.
The object is to fill all empty squares so that the numbers 1 to N (where N is the number of rows or columns in the grid) appear exactly once in each row and column and the numbers in each block produce the result of the math operation shown in the top-left corner of the block.
For example, in the first and fourth columns beginning from the left of the 9×9 grid, we can form the following equations: m+n=a, g+n+f=g+c. In the second and last rows beginning from the top of the 9×9 grid, the following equations can be formed: b+g+f=a+g, e+n+m=a+b+d.22-Mar-2016
The World's Hardest Killer Sudoku A Killer Sudoku is very similar to a Sudoku, except that the clues are given as groups of cells + the sum of the numbers in those cells.25-Jul-2013
When Inkala developed the AI Escargot in 2006, he said, it is “the most difficult sudoku-puzzle known so far.” “I called the puzzle AI Escargot, because it looks like a snail. Solving it is like an intellectual culinary pleasure. AI are my initials,” Inkala had said.20-Aug-2010
Samurai sudoku (also known as Gattai-5 or simply Samurai) is a sudoku variant where there are five overlapping grids that need to be solved. These five grids overlap to form an X shape as shown below. In most versions of Samurai sudoku, each of the five regular sudoku grids can be solved independently of each other.
The Rubik's Cube is a 3-D combination puzzle originally invented in 1974 by Hungarian sculptor and professor of architecture Ern? Rubik.