THE PLAYBOOK · DAIKUANZ
The essentials of playing 4x4 Sudoku
Choose a round of 4x4 Sudoku and settle into its rules. Fill all cells with 1–4; do not repeat a symbol in any row, column or region. Keep the game area visible while you use its controls. Read the objective before making your first input. Look at what changes after your first action.
Practice beyond the first move
After a move, check what changed. Decide which rule explains the new state before acting again. Make the next step deliberately.
Your objective
Fill all cells with 1–4; do not repeat a symbol in any row, column or region. Read that aim before choosing your first action. Take a moment to understand the current position.
Step by step
- Select an empty cell. The original clues cannot be edited.
- Choose a symbol from the number pad, or type it on a keyboard.
- Turn Notes on to record candidate symbols without committing an answer.
- Use Check entries to check your filled values. Hint reveals one value from the verified solution.
- Complete the board, or choose New puzzle for another board.
Keyboard and screen controls
Tap or click a cell and use the number pad. Keyboard: arrows select cells; digits (and A–G on 16×16) enter values; Backspace erases. Keep the playing area visible while using these controls. Read the example below alongside these instructions.
An example before you play
On one puzzle in this collection, row 1, column 2 has 2 in its solution. Read the clues on your current board before using that value; another puzzle can need a different entry. Use the example as a guide rather than a substitute for reading your board. Take a moment to compare.
Avoid this misunderstanding
Notes are reminders, not final entries. A full board only counts as complete when it satisfies every rule. Check the rule before repeating the action. Choose one rule to keep in mind for this round. Apply it consistently rather than guessing what another version might allow.
Common questions
While reading the Guide, what is the goal of 4x4 Sudoku?
Fill all cells with 1–4; do not repeat a symbol in any row, column or region.
As a new player, how do I control 4x4 Sudoku?
The key detail is this: Tap or click a cell and use the number pad. Keyboard: arrows select cells; digits (and A–G on 16×16) enter values; Backspace erases.
What example helps explain 4x4 Sudoku?
Here is the relevant explanation: Before filling a cell, compare the symbols already used in its row, column and 2 × 2 region. A candidate must be absent from all three.
For this browser game, what should I watch out for in 4x4 Sudoku?
The key detail is this: Notes are reminders, not final entries. A full board only counts as complete when it satisfies every rule.
When I return, what format does 4x4 Sudoku offer?
The key detail is this: Play using the solo mode shown on this page. Read the controls before starting a new round.
For my first round, which play mode does 4x4 Sudoku use?
For clarity: The mode on this page is Solo. Same-device play uses one screen; this game library does not provide internet matchmaking.