Tricky puzzles for quick wits - puzzles - are not only fascinating, but also useful. This is a wonderful gymnastics for the mind, developing attentiveness, logic, the ability to analyze, and even allowing you to enjoy the decision.
Numerical puzzles
Perhaps the most popular puzzle of our time is Sudoku.
“Sudoku” in Japanese is “numbers separately.”
This game is a 9x3 square, consisting of 3x3 small squares. In complex games, squares can be more - 15x15, 25x25 or more. In several cells, numbers are pre-arranged - this is the key to unraveling.
Puzzles, where additional conditions of the problem - numbers from 1 to 9 - are located on the diagonals, are called "Diagonal Sudoku", or, in the English version, Sudoku X.
The way to solve the problem is like scanning - in the square, the row that is most filled with key numbers is selected - the less empty cells, the easier it is to find the missing number.
Diagonal Sudoku, in turn, also have various variations and combinations.
Task options
Diagonals can be large and small - in the main square, in blocks of small squares, angular and broken.
- Color diagonal - Sudoku, in which the digital values must be placed separately in each color block.
- The more complex diagonal-sudoku - the anti-diagonal - on the diagonals of a square there are only three different numbers.
- A pandiagonal square whose rows, columns and diagonals contain numbers from 1 to 25 - in such a sudoku, the diagonals are complex. Interestingly, it is impossible to make a smaller pandiagonal square. One of the numbers that is not in the selected row is applied in order to all empty cells of the row. If at the intersection of cells this number is not, it can be put in a cell.
We perform this operation until all empty cells are filled. And we reconcile the columns, small squares 3x3 and diagonals so that the numbers do not repeat.
Mathematical skills in solving sudoku are not required.