2024-March-27
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Solve in your web-browser, or on an iPad, Kindle Fire or Android tablet.
Challenging puzzles that combine Sudoku + Kakuro strategies.
My original collection has tons of interactive Sudoku puzzles.
Also known as Cross Sums, these numeric crossword puzzles tickle the brain.
Don't pull your hair out over these new puzzles! Don't let the shapes line up.
Oh my gosh, they're full of stars! A fun object-placement puzzle currently published in The New York Times as Two Not Touch.
Full Sudoku Menu
Printable versions of all these puzzles (and many more).
Sometimes called Tectonics or Number Blocks, these puzzles have very simple rules but can be extremely challenging!
Sudoku puzzles with irregular shapes like a jigsaw puzzle.
An addictive binary puzzle, also known as Binairo, Binoxxo, Tic-Tac-Logic, Takuzo, Bineiro, Brain Snacks, Unruly, Zinero and Zernero.
Three-way Binox! Also known as Trinox, Threedoku, and Train Snacks.
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Protect aliens from mutant cactus in this engaging hybrid of Slitherlink, Masyu, and Cow & Cactus.
A solitaire version of the classic strategy game in which you hunt and sink a hidden enemy fleet.
Build a corral to keep your cows from eating the cactus in this path-building treat.
Also known as Tentai Show in Japan, these lovely puzzles are all about symmetry.
Also known as Light-up, you'll illuminate the world as you place lights in just the right spots.
Also known as Hashiwokakero, connect islands to form a network of bridges in this spatial-reasoning puzzle.
Mathematical Sudoku-like puzzles.
Elegant numberless pathway puzzles with pearlescent clues.
Conjoined Sudoku grids make for a longer-lasting and most satisfying solving experience.
Also called Unequal and More-or-Less, Latin squares with inequality signs.
Beautiful spatial-reasoning puzzles for the discriminating solver.
Draw meandering loops in this addictive logic puzzle involving spatial reasoning.
A variant of Suguru in which the clues create curious cascading effects.
Jigoku means hell in Japanese, and these fiendishly difficult Sudoku puzzles with greater- and less-than signs will show you why.
Come join the Krazydad community at our own Discord Server. Get technical help, suggest new features or just discuss your deepest puzzle thoughts!