Blackboard Sudoku

Step back into the classroom with Blackboard Sudoku — a beautifully crafted number puzzle game wrapped in a nostalgic blackboard and chalk aesthetic. Every detail, from the chalky handwritten numbers to the subtle dust particle effects, is designed to transport you back to the days of solving problems at the front of class.

THREE DIFFICULTY LEVELS — GRADE YOUR CHALLENGE

Start with Grade 1 for a gentle warm-up, perfect for beginners and casual puzzlers. Move up to Grade 3 when you're ready for a real brain workout with trickier logic. For seasoned Sudoku veterans, Grade 6 delivers expert-level puzzles that will truly test your skills. Each difficulty is themed after school grades, making every step up feel like a graduation.

CLASSIC SUDOKU, THOUGHTFULLY DESIGNED

Place numbers 1 through 9 in every row, column, and 3x3 box — the timeless rules you know and love, presented with care. Use Note Mode to pencil in candidates just like jotting notes in the margin of your notebook. Made a wrong move? The mistake tracker gives you three lives per puzzle, keeping the stakes real without being punishing. When you're stuck, the hint system is there to nudge you in the right direction using coins you earn or purchase.

CELEBRATE EVERY WIN

Complete a puzzle and watch a satisfying stamp animation mark your achievement — just like getting a gold star from your teacher. Your Report Card tracks your performance across all difficulty levels, recording completion times, accuracy, streaks, and more. Review your stats anytime to see how far you've come.

PLAY YOUR WAY

Blackboard Sudoku is fully playable offline, so you can enjoy it on the bus, on a plane, or anywhere without a connection. The game is available in both English and Traditional Chinese (繁體中文), so you can play in the language most comfortable for you.

OPTIONAL UPGRADES

Earn coins through gameplay or grab a coin pack to stock up on hints. Prefer an uninterrupted experience? The Remove Ads option lets you play in peace. Ads are kept minimal and non-intrusive, so free players can enjoy the full game without frustration.

Download Blackboard Sudoku today and rediscover the joy of puzzle-solving on the most charming blackboard you've ever seen. Class is in session!