Daily Logic Games
Play Daily Sudoku, the classic logic-based number placement puzzle. Fill the 9x9 grid using pure logic—no guessing required. Track your stats, build your daily streak, and train your brain with our free game.
Difficulty:
Diff:
Easy
Time:
0:00
Errors:
Errors:
0/3
Take your time.
My coffee's still hot!
My coffee's still hot!
Errors
0/3
Time
0:00
How to Play: Daily Sudoku
🎯 The Golden Rule
The goal is simple: fill the 9x9 grid so that every row, column, and 3x3 box contains the numbers 1 to 9 exactly once. No math or arithmetic is required—just pure logic! No row, column, or 3x3 box can contain duplicate numbers.
🕹️ How to Play (Controls)
- Select & Place: Click or tap any empty white cell, then select a number (1-9) from the keypad below or your keyboard.
- Notes (Pencil Mode): Click the Pencil icon (✎) to toggle notes. Use this to jot down possible numbers when you aren't sure. Tip: Turn on Auto-Clear Notes in settings!
- Mistake Limit: Watch carefully! You have a 3-mistake limit per game.
- Tools: Use Undo (↶) to revert a move and Erase (⌫) to clear a cell.
🧠 Step-by-Step Starter Strategy
- The "Nearly Full" Scan: Easiest first move! Scan for any row, column, or 3x3 box that already has 7 or 8 numbers. Count 1-9 to find the missing digits and place them.
- Cross-Hatching: Pick a frequent number on the board (e.g., 7). Trace imaginary lines across the rows and columns that already contain a 7. This blocks out spaces, often leaving only one valid square for a 7 inside an empty 3x3 box.
- Naked Singles: Look at a single empty square. If you see eight different numbers in its shared row, column, and 3x3 box, that square is forced to be the one remaining digit.
⭐ Three Golden Rules for Beginners
1. Never Guess: Every single move can be proven with pure logic. If you have to guess, look elsewhere!
2. Keep Moving: If a section feels stuck, don't force it. Shift your focus to a different number or area of the grid.
3. Use the Tools: Take advantage of hints and notes to guide your learning.
Keyboard Navigation for Screen Readers
- Arrow Keys: Move focus between cells on the grid.
- Number Keys (1-9): Input a number into the currently focused cell.
- Backspace or 0: Clear the currently focused cell.
- P: Toggle Pencil (Notes) mode on or off.
- C: Check your current board for mistakes.
- H: Use a hint.
Mastering Sudoku
How do I play Daily Sudoku?
The goal is to fill the 9x9 grid so that every row, column, and 3x3 box
contains the numbers 1 through 9 exactly once. Start by scanning for obvious placements and
use the pencil tool (notes) to track multiple possibilities in empty cells.
Are these Sudoku puzzles solvable without guessing?
Yes. Every puzzle generated on Daily Logic Games has a single, unique
solution that can be deduced entirely through pure logic. Guessing is never required to
complete our puzzles.
What is the best strategy for beginners?
Look for "Naked Singles"—cells where only one specific number can
possibly fit based on the intersecting row, column, and block. Cross-hatching is also highly
effective: focus on one number (e.g., '5') and scan the board to see where a '5' must be
placed in an empty 3x3 block.
Do I need to be good at math to play Sudoku?
Not at all! Despite using numbers, pure Sudoku involves absolutely no
arithmetic or math skills. The numbers 1 through 9 are simply used as unique symbols. You
could replace them with letters, colors, or shapes and the logic required to solve the
puzzle would remain exactly the same.
What are "Pencil Marks" and when should I use them?
Pencil marks (or notes) allow you to jot down multiple possible
candidates for an empty cell when you aren't certain of the final answer. You should start
using the Pencil tool when the obvious "Naked Singles" dry up. As you place definitive
numbers on the board, remember to update or erase your overlapping pencil marks to reveal
deeper patterns.
What is a "Hidden Single"?
A Hidden Single occurs when a specific number can only be placed in one
exact cell within a specific row, column, or 3x3 block—even if that cell has other
penciled-in candidates. Because that number has literally nowhere else to legally go in that
sector, it becomes the definitive answer for that cell.
What is the "Naked Pairs" strategy?
A Naked Pair happens when exactly two cells in the same row, column, or
block contain the exact same two pencil-mark candidates (and no others). Because those two
numbers perfectly account for those two cells, you can safely erase those two numbers from
the pencil marks of every other cell in that shared row, column, or block.
What is the "X-Wing" technique?
The X-Wing is an advanced logic pattern where the same candidate number
is restricted to exactly two identical columns across exactly two different rows (forming a
rectangle or "X"). When you spot this lock-out pattern, you can safely eliminate that
specific candidate number from every other cell in those two columns.
