A good way to spend a Friday night is to play a new 0h h1 puzzle.
The meaning is simple: you need to fill the entire game space with squares of red and blue. It is forbidden to place in a row three squares of the same color.
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A red square is created with a single click, a blue one is created with a double click. Another rule is that each row and column should have the same number of red and blue squares.
And the last rule - the creation of identical rows is not allowed.