The best books, apps, and gear for 2026 — curated by logic-first solvers.
We only recommend tools that promote logic-based solving. We avoid apps and books that rely on guessing, "trial and error" design, or that give answers without teaching you the underlying technique. Every resource on this page was selected for its educational value and puzzle quality.
Paperback picks for every skill level and playing style
The gold standard. This isn't just a book of puzzles — it's a masterclass in logical technique. Gordon walks you through every strategy with clarity, from simple scanning to advanced patterns. If you only buy one Sudoku book, make it this one.
Beginner AdvancedSmall, portable, and curated by the legendary New York Times crossword editor. The puzzles are well-constructed and graded sensibly from Easy to Hard. A perfect companion for commutes and coffee breaks.
BeginnerFeatures giant, easy-to-read grids with high-quality paper that doesn't bleed through. The clear formatting and generous cell spacing makes this an excellent choice for seniors and anyone who prefers solving on paper without eye strain.
Senior-Friendly BeginnerWidely considered the most balanced and logically sound Killer Sudoku puzzles available in print. Every cage is thoughtfully constructed, and the difficulty progression is excellent. Pairs perfectly with our Killer Sudoku Sum Chart.
Killer Sudoku AdvancedLogic-first apps for iOS and Android
Best Overall. A clean interface, great daily challenges, and a hint system that actually teaches you techniques rather than just handing you the answer. The "Techniques" hint mode is exceptional for learners — it tells you what kind of logic to look for rather than simply solving the cell for you.
iOS Android Free BeginnerBest for Advanced Players. Famous among serious solvers for its hint system, which can walk you through complex moves like XY-Wings and Swordfish step by step. If you want to learn advanced techniques interactively, this is the app to use alongside our Advanced Techniques guide.
iOS Android AdvancedBest for Variants. If you want to try Jigsaw, Killer, Sandwich, and Hyper Sudoku all in one app, this is the gold standard for variant support. The variant library is extensive and the interface is clean and accessible. Excellent for players who have mastered the classic game.
iOS Android KillerThe right tools make a real difference on paper
The Perfect Pencil. A fine 0.5mm lead is essential for writing legible pencil marks in the small corners of cells without smudging across to adjacent cells. The metal grip and balanced weight make it comfortable for long solving sessions. A genuine upgrade from a standard school pencil.
The "Clean Sweep" Eraser. Nothing ruins a solving session faster than a smudge that leaves ghost marks behind. The Pentel Hi-Polymer erases cleanly and completely without tearing the paper. If you're playing on paper, this is a must-have.
The "Traveller's Friend." Poor lighting leads to eyestrain and missed pencil marks. A small, adjustable LED lamp with a neutral white light makes solving in the evening dramatically more comfortable — especially for older adults or anyone who prefers solving on paper. Look for a lamp with adjustable colour temperature.
Senior-FriendlyThe best free puzzle platforms on the web
The Daily Standard. The NYT offers Easy, Medium, and Hard grids every day. The puzzles are thoughtfully constructed and genuinely well-tested — their "Hard" puzzle is an excellent benchmark for intermediate skill. A reliable daily habit for any serious solver.
Web FreeThe Logic Hub. If you get truly stuck on a puzzle, you can input your grid here and the solver will tell you exactly which advanced technique is needed to move forward — not just the answer, but the method. An invaluable learning tool that pairs brilliantly with our Glossary.
Web Free AdvancedThe Community Choice. Watch world-class solvers take on "impossible" puzzles in real time, narrating their logic as they go. It is by far the best way to see advanced techniques like Swordfish and Unique Rectangles in action. The companion app features original puzzle variants you won't find anywhere else.
YouTube iOS Android Free