SudokuDB.com

SudokuDB.com brings the world's largest Sudoku collection to Windows. Whether you want a relaxing Classic 9x9 or a brain-bending variant you've never tried, there's always a fresh puzzle waiting. Every puzzle is generated and quality-checked by our own puzzle engine, drawing on a database of millions of grids, so there's always something new to solve. 60+ SUDOKU VARIANTS Classic, Killer, Thermo, Arrow, Sandwich, X-Sudoku, Windoku, Jigsaw, Miracle, Kropki, Skyscraper, Renban, German Whispers, Even/Odd, Futoshiki, Hitori, Numbrix, MathDoku and dozens more, plus quick Mini 4x4 and 6x6 grids for a fast game. SIGNATURE 3D TOWER SUDOKU Our exclusive twist: solve the stacked layers of a rotating 3D tower where every floor, row, column and pillar all have to line up. Nothing else plays quite like it. A NEW CHALLENGE EVERY DAY Three Daily Challenges each day, a Classic, a Tower, and a rotating variant. Build your daily streak, chase Perfect Days, and climb the global leaderboards. PROGRESS AND REWARDS Earn XP, level up, complete daily and weekly quests, and unlock cosmetic themes and effects as you play. COMFORTABLE, SMART PLAY Pencil-mark notes, color highlighting, mistake tracking, hints when you're stuck, and one-tap undo, on a clean board that scales to your screen. Free to play. Download SudokuDB.com and start solving.