SUDOKU CHAIN

Again, the inventors of the puzzles treated Sudoku critically and decided to change the usual type of game, creating a chain of numbers and replacing them for traditional large and small squares. One such circuit has length 5 or 6 cells, depending on player choices. Thus, this metamorphosis resulted in a change in the rules fill cells with numbers. By the way, here the cell is not square but round.

Since the squares retired from the game, the new rule sounds like. In the same chain, row and column contains no number must be repeated twice. That is, for example, 1 (one) can only meet once in a single circuit, row and column. The puzzle has undo, use it if you feel that was wrong.