Learn Sudoku
Giao diện
A visual guide · Sudoku
Tìm hiểu Sudoku
Use logic to complete the grid — solo or in a live race.
1–9
digits used once per unit
Mục 01 · Thiết lập
Start from the given clues.
Clue cells are fixed. Your job is to fill every empty cell without repeating a digit in its row, column, or 3×3 box.
5
3
7
6
1
9
5
9
8
6
8
6
3
4
8
3
1
7
2
6
6
2
8
4
1
9
5
8
7
9
Every row, column, and outlined 3×3 box must contain 1 through 9 exactly once.
Mục 02 · Lượt của bạn
Choose one empty cell and enter a digit.
A useful candidate must satisfy all three constraints at once: the row, the column, and the 3×3 box containing that cell.
Mục 03 · Chiến thuật
Look for units with only a few possibilities left.
Scan rows, columns, and boxes with many clues. When one digit has only one legal position, place it and rescan the intersecting units.
Mục 04 · Trình tự lượt chơi
Một lượt, theo thứ tự.
①
Scan the givens.
Find rows, columns, and boxes that are already close to complete.
②
Eliminate impossible digits.
Use existing numbers to narrow the candidates for each empty cell.
③
Place a forced value.
When only one digit can fit a cell or one position can hold a digit, enter it.
④
Repeat until the grid is complete.
Each correct placement creates new information for nearby cells.
Mục 05 · Hợp lệ và không hợp lệ
Điều gì được tính — và điều gì không.
Pháp lý
Using each digit 1 through 9 once per row.
Using each digit 1 through 9 once per column.
Using each digit 1 through 9 once per 3×3 box.
Không được phép
Repeating a digit in a row, column, or box.
Changing one of the original clue cells.
In race mode, trying to inspect or edit the other player's board.
Mục 06 · Chiến thắng
A correct completed grid finishes the puzzle.
Solo play ends when the board is correct. In a two-player race, both players solve the same puzzle separately and the first correct completion wins.
Mục 07 · Thử ngay
Chơi một ván trò chơi.
Try a solo puzzle to learn the keypad, or create a room and race a friend while watching each other's completion progress.