This is four new Sudoku Chain puzzles of size 7x7. Don't forget to use numbers 1 to 7 (Rules of Sudoku Chain). The first three are of medium difficulty and the last one is a little bit harder, but I know that does not frighten you.
The printables file PDF.
Puzzle : sudo_chain_7_000434.pdf
Solution : sudo_chain_7_000434_sol.pdf
The printables file PDF.
Puzzle : sudo_chain_7_007274.pdf
Solution : sudo_chain_7_007274_sol.pdf
The printables file PDF.
Puzzle : sudo_chain_7_007301.pdf
Solution : sudo_chain_7_007301_sol.pdf
The printables file PDF.
Puzzle : sudo_chain_7_013654.pdf
Solution : sudo_chain_7_013654_sol.pdf
Enjoy !!.