Jigsaw Sudoku

About einstein jigsaw sudoku

Every Einstein-level jigsaw sudoku puzzle on this site has been certified solvable through pure logic. The generator constructs a proof that a step-by-step solving path exists before accepting the puzzle. No trial-and-error, no bifurcation. This is the hardest jigsaw sudoku you'll find online. Nobody else offers a logic-guaranteed difficulty tier for irregular sudoku. If you can consistently solve these, you've mastered the format.