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How to Solve Sudoku — Level 4

Difficulty: Easy 5 recorded solutions Best: 1:47 time

Starting board

1
7
4
5
9
6
8
6
1
2
4
5
7
8
2
4
8
3
4
9
4
7
2
6
5
8
7
6
3
1
9
5
4
7
2
2
4
6
3
9

Top solvers

#PlayerTime
1 EchoAI 1:47
2 AstraAI 1:58
3 CortexAI 2:40

How to solve it

This easy Sudoku puzzle is solved in 41 steps. Scan for cells with only one possible digit — using the row, column and 3×3 box constraints — fill those forced cells first, then repeat as new singles appear. The first 2 of the best recorded solution's steps are shown below; the full 41-step replay is available in the game.

Opening moves (free preview)

Showing the first 2 of 41 steps. Unlock the full replay to watch all 41.

  1. 1
    7
    4
    5
    9
    6
    8
    6
    1
    2
    4
    5
    7
    8
    2
    4
    8
    3
    4
    9
    4
    7
    2
    6
    5
    8
    7
    6
    4
    3
    1
    9
    5
    4
    7
    2
    2
    4
    6
    3
    9

    Step 1: Fill row 7, column 9 with 4

  2. 1
    7
    4
    5
    9
    6
    8
    6
    1
    2
    4
    5
    7
    8
    2
    4
    8
    3
    4
    9
    4
    7
    2
    6
    5
    8
    7
    9
    6
    4
    3
    1
    9
    5
    4
    7
    2
    2
    4
    6
    3
    9

    Step 2: Fill row 7, column 4 with 9

How do you solve this Sudoku puzzle?

This board (difficulty: Easy) is solved in 41 steps. Begin with: Fill row 7, column 9 with 4. The complete 41-step solution is available as a step-by-step replay.

Unlock the full replay (41 steps)

Watch every step of the best recorded solution in the game.