The Sudoku Chain is similar to the Jigsaw Sudoku, each one have regions of irregular shapes. The Sudoku Chain is composed many groups of circles linked together. The goal is to fill the grid with number 1 to 4 for a grid of size 4X4 up to 1 to 9 for a grid of size 9x9, so that at the end each row, column and group have each number exactly once. To better understang, this is a puzzle with the solution.
So don't wait and try this puzzle.
