Lightwell vs Tsuidoku

Lightwell is a clean logic puzzle inspired by Akari, the Japanese “Light Up” puzzle. Place lights to illuminate the board. Lights shine horizontally and vertically until blocked by a wall. Numbered walls tell you exactly how many lights touch them. Every cell must be lit, and no two lights can see each other. Simple rules. Pure deduction. If you love Sudoku, Minesweeper, Picross, Nonograms, or the daily Mini and Strands, Lightwell was made for you. WHAT’S INSIDE • 1,600 handcrafted puzzles across four difficulty levels: Easy, Medium, Hard, and Expert • Daily puzzles to compete for the bes time • Every puzzle is solvable through logic alone. No guessing • Hints that always give you a valid next step • X-mark notes for tracking impossible cells • Pick up right where you left off NO NOISE • No ads • No subscription • No energy systems or timers • No streak pressure • No accounts or sign-ins A single one time purchase unlocks every level past 100 in each pack plus detailed stats. Hundreds of puzzles are completely free to play. FOR PLAYERS WHO • Enjoy thoughtful puzzle games • Want something relaxing between meetings or before bed • Like deduction over randomness • Want a clean, focused experience that respects their time ACCESSIBILITY • High-contrast themes • Large touch targets • Color is never the only indicator • Designed to stay readable even on dense expert grids Built quietly. Updated with care.

Tsuidoku is a logic puzzle for players who have mastered classic Sudoku. The 9×9 grid remains, but a fourth constraint changes everything. THE 4 RULES Each row, column, and 3×3 region must contain the numbers 1 through 9 AND the 9 colors. The twist: each color must also contain all 9 numbers. The result: 81 unique number-color pairs. Place a "Red 5," and it cannot appear anywhere else. DAILY CHALLENGE A unique global grid every day—the same one for the whole world. Maintain your streak, earn monthly medals, and check the daily rankings. MASTER THE TECHNIQUES - Rainbow Technique: Track a single number across all nine colors. - Color Wheel: Track a single color across all nine numbers. Tap a cell to cycle through highlight modes and see the logic light up. PLAY TOGETHER Add friends, compare stats, and chat directly within the app. A detailed profile tracks your records across every difficulty level. Think you’ve mastered Sudoku? The real game starts here. Download now and create your first 81 perfect pairs.