SUDOKU CHAINS

Once again, the inventors of puzzles were critical of Sudoku and decided to change the usual way of playing the game, creating chains of numbers and replacing them with the usual large and small squares. One such chain has a length of 5 or 6 cells, depending on the option chosen by the player. Thus, this metamorphosis led to a change in the rules for filling cells with numbers. By the way, the cell here is not square, but round.

Since the squares are out of the game, the new rule reads like this. No number should be repeated twice in the same chain, row, or column. That is, for example, 1 (one) can only occur once in the same chain, row, and column. The puzzle provides for a turn cancellation, use it if you feel that you made a mistake.