SUDOKU QUEST

The word questin the name of the game in no way affects the rules and objectives of this game-it's still the same classic Sudoku puzzle, the field of which consists of nine squares with nine cells in each. In one small square, as well as in any line of cells vertically and horizontally, the numbers should not be repeated. I.e., for example, there can not be two triples or, say, fives in the same row.

Logic can be developed gradually, from square to square, or from line to line, achieving digital uniqueness in each(s). If you are not sure about the number in a particular cell, you can put several pencils at once-press and hold the spacebar to enter the rough possible variants of numbers in the cell.

And also, if the number displayed in the cell is red, then you made a mistake — there can't be such a number in this cell, if it's blue — the number is possible.