#### Hitori

Hitori - is a logical puzzle that consists in crossing out repeating numbers, each of them can appear in a row or column exactly once. Crossed-out squares cannot touch sides, only angles. Bright fields must form one coherent white whole. That is, none of them can be isolated.

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#### Kakuro

Kakuro is a number puzzle that is a mathematical version of the traditional crossword puzzle. Fill in the diagram with sequences of numbers from 1 to 9. The number in the upper right corner of the black field is the sum of the digits of the horizontal "word", the number in the lower left corner - the sum of the digits of the vertical "word".

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#### Sudoku

A puzzle whose objective is to fill a 9 × 9 grid so that each row, each column, and each of the nine 3 × 3 bold squares (called "blocks" or "sub-squares") contain one digit from 1 to 9 .

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#### Podział doskonały

The goal of this simple but addictive game is to occupy all the squares with lines whose length is strictly defined. No field can be left empty and no field can be occupied by two lines.

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