01
Classic boards
Quick 6×6, timeless 9×9, extended 12×12, and deep-focus 16×16 grids.
Sudoku, with a twist
Think beyond
the grid.
Classic logic meets inventive variants, clear lessons, and a Smart Coach that helps you understand the next move - not just reveal it.
- 13+ways to play
- 36lessons & guides
- 6difficulty levels
Building the board…
Drag to rotate
Play your way
Daily challengesCampaignsRanked puzzlesCustom grids
Every grid tells a different story
More than classic Sudoku.
Start with familiar rules, then discover constraints that make you see every row, column, and candidate differently.
02
Killer
Cage sums add arithmetic to pure Sudoku logic.
03
Thermo
Digits rise from every bulb to its tip.
04
Arrow
Every shaft must sum to its circled digit.
05
Kropki
White and black dots reveal relationships between neighbors.
06
Diagonal
Both main diagonals become full Sudoku units.
07
Vanilla
The purest form of Sudoku logic with no extra constraints.
08
Fog Reveal
Solve correctly to clear the mist and reveal the next clues.
09
Make it yours
Create, import, validate, and share custom puzzles.
- Samurai
- Ranked
- Daily Challenge
- Campaign
X-Wing
Pairs
Scanning
Learn the logic
A puzzle library that grows with you.
Begin with rows, columns, boxes, and pencil marks. Move through locked candidates and pairs, then master X-Wing, Swordfish, XY-Wing, Skyscraper, and variant-specific strategies.
01Guided lessonsClear explanations from beginner rules to advanced patterns.
02Deep-dive articlesDiagrams, worked steps, practice prompts, and recaps.
03Smart CoachHints that explain which constraint matters and why.
A focused daily ritual
Train the process, not a promise.
Sudoku is active practice for focused attention, working memory, and logical decision-making. Its value comes from reasoning through constraints—not from magic brain-training claims.
Focus
Hold a goal, filter distractions, and stay with a chain of reasoning.
Working memory
Track candidates and update possibilities after every placement.
Logic
Compare constraints, eliminate impossibilities, and explain each move.
Progress
Build skill gradually through variety, reflection, and harder puzzles.
Keep moving forward
Every solve becomes part of the journey.
Return for daily challenges, follow campaign trails, complete weekly quests, collect achievements, and review your personal puzzle history.
- Difficulty and mode records
- Daily calendar and streaks
- Optional Google account sync
Weekly quest5 / 7
12Day streak
84%Clean solves
1,248Skill score
Your next grid is ready
Find your twist.
Choose a familiar board or learn a completely new way to solve.
Get it onGoogle Play