Jigsaw Sudoku follows the same rules as regular Sudoku in that all 9 rows, columns and blocks must contain the numbers 1 - 9, ie
no number is duplicated in any row, column or block.
The difference in Jigsaw Sudoku is that the 9 blocks are not square but have irregular shapes (like Jigsaw pieces).
Every puzzle will have different shaped pieces (blocks).
All puzzles are solvable by pure logic alone - no guessing required. There is one new puzzle per difficulty level per day.