Sudoku Mastermind: Brain Game

Sudoku Mastermind is classic sudoku made calm, clear and fair. Every puzzle is freshly generated and checked to have exactly one solution, so you can always solve it by logic — no guessing. 🧩 CLASSIC 9×9 SUDOKU, FIVE LEVELS Easy, Medium, Hard, Expert and Epic: from 47 clues for a relaxed warm-up to just 21 clues for a real brain workout. Each difficulty shows how many numbers you start with, so you know what you are signing up for. 📅 DAILY CHALLENGE A new puzzle every day — the same one for every player. Come back tomorrow for the next one. ✏️ NOTES, HINTS AND SMART TOOLS • Pencil notes (candidates) for advanced solving techniques • Fill all notes with one tap • Hints when you are stuck • Undo, clear board and auto-complete for the last few cells • Each number key shows how many of that digit are still missing 🎯 HIGHLIGHTS THAT HELP Highlight the row, column and 3×3 box of the selected cell, matching numbers and mistakes. Turn every helper on or off in Settings — play the way you like. 🏆 GLOBAL LEADERBOARD Earn points for every solved puzzle: faster solves and fewer mistakes score more. Climb the leaderboard under a fun generated name — an animal, a car or a famous mountain. No sign-up, no personal data. 🌙 EASY ON THE EYES Clean, modern design with a full dark mode, large readable digits and smooth animations. Works on phones, tablets and foldables. 🎃 SEASONAL THEMES Halloween, Christmas, New Year and other holidays bring their own colours and decorations, matched to where you play. ✅ PLAY ANYWHERE The puzzles are generated on your phone, so you can play sudoku offline. Your game is saved automatically — continue any time. Looking for a free sudoku app for brain training? Sudoku Mastermind is a relaxing number puzzle with large, easy-to-read digits — great for adults and seniors, from your first easy sudoku to expert and epic grids. Perfect for sudoku beginners learning the rules and for experienced players looking for a daily logic puzzle to keep the mind sharp. Free to play with ads; ads never interrupt a puzzle.