How to Solve LinkedIn Mini Sudoku #152 (Precision) – Step‑by‑Step 6x6 Guide

Game: LinkedIn Mini Sudoku
Question ID: 152
Question name: Precision
Published on: January 10, 2026

This walkthrough shows a clean, logical path through LinkedIn Mini Sudoku #152 (Precision), a 6x6 Sudoku. We will fill every empty cell step by step from the given clues, without guessing. The final completed grid is not shown here; you can check it on the dedicated solution page.

Digits used: 1, 2, 3, 4, 5, 6
Size:       6 rows × 6 columns
Boxes:      Six 2×3 boxes
Each row, column, and 2×3 box must contain 1–6 exactly once.

1. Write the starting grid clearly

Let’s label rows R1–R6 and columns C1–C6. A dot “.” means an empty cell.

R1: .  .  .  .  .  4
R2: .  1  .  2  .  .
R3: .  .  .  .  3  .
R4: .  4  .  .  .  .
R5: .  .  3  .  1  .
R6: 5  .  .  .  .  .

Boxes (2×3 each):

• Box 1: R1–R2 × C1–C3
• Box 2: R1–R2 × C4–C6
• Box 3: R3–R4 × C1–C3
• Box 4: R3–R4 × C4–C6
• Box 5: R5–R6 × C1–C3
• Box 6: R5–R6 × C4–C6

2. Start with the most constrained rows, columns, and boxes

Row 6

Row 6: 5 . . . . .
Missing digits are {1, 2, 3, 4, 6}.

• R6C1 = 5 is given.

Box 5 (R5–R6 × C1–C3)

R5: .  .  3
R6: 5  .  .

Digits present: {3, 5}. Missing {1, 2, 4, 6}.

• R5C3 = 3 and R6C1 = 5 are fixed; the other four cells will be resolved later after we get more column/row information.

Column 2

C2: .  1  .  4  .  .

Digits present: {1, 4}. Missing {2, 3, 5, 6}.

Column 5

C5: .  .  3  .  1  .

Digits present: {1, 3}. Missing {2, 4, 5, 6}.

Box 2 (R1–R2 × C4–C6)

R1: .  .  4
R2: 2  .  .

Digits present: {2, 4}. Missing {1, 3, 5, 6}.

3. Use interactions between boxes and lines

Column 4

C4: .  2  .  .  .  .

Missing digits are {1, 3, 4, 5, 6}.

Box 1 (R1–R2 × C1–C3)

R1: .  .  .
R2: .  1  .

Digit 1 already sits at R2C2. Remaining digits {2, 3, 4, 5, 6} to place in this box.

Box 3 (R3–R4 × C1–C3)

R3: .  .  .
R4: .  4  .

Digits present: {4}. Missing {1, 2, 3, 5, 6}.

4. Find the first definitive placements (singles)

Column 1

C1: .  .  .  .  .  5

Missing digits are {1, 2, 3, 4, 6}.

• Box 5 already uses 5 at R6C1, so all other digits in this column are from {1, 2, 3, 4, 6}.

Column 6

C6: 4  .  .  .  .  .

Missing digits are {1, 2, 3, 5, 6}.

• R1C6 = 4 is fixed.

Row 1 now

R1: .  .  .  .  .  4

Missing digits are {1, 2, 3, 5, 6}.

Box 2 revisited

R1: .  .  4
R2: 2  .  .

Missing digits {1, 3, 5, 6} go in positions R1C4, R1C5, R2C5, R2C6.

5. Use each 2×3 box as a mini‑puzzle

Box 6 (R5–R6 × C4–C6)

R5: .  1  .
R6: .  .  .

Digits present: {1}. Missing {2, 3, 4, 5, 6}.

Box 4 (R3–R4 × C4–C6)

R3: .  3  .
R4: .  .  .

Digits present: {3}. Missing {1, 2, 4, 5, 6}.

At this stage the puzzle is still quite open, so we start cycling through rows and columns again, looking for places where a digit can only go in one cell within a line or a box.

6. Narrow candidates and spot hidden singles

To keep this readable, here is an example of how we restrict one row using column data. We’ll illustrate on a line once some structure appears.

Focus on Row 5

R5: .  .  3  .  1  .

Missing digits are {2, 4, 5, 6}.

• R5C5 = 1 (given) blocks 1 from that row.
• Interactions with boxes and columns gradually force where {2, 4, 5, 6} can appear.

Similarly, we repeatedly:

• List missing digits for a row/column.
• Check each candidate cell against its box and column/row.
• Eliminate impossible digits until a cell has a single candidate (a naked single).

7. Key logical breakthroughs

As you proceed, several important moments unlock the grid. The exact order can vary slightly, but all placements come from these standard techniques.

Breakthrough 1: Filling the structure of the middle boxes

By carefully applying missing‑digit logic to:

• Column interactions in C2 and C5, and
• Box 3 (R3–R4 × C1–C3) and Box 4 (R3–R4 × C4–C6),

you reach a point where each of rows 3 and 4 has only two or three possibilities per cell, and several hidden singles appear. Each time a digit completes a row or column, that same digit is eliminated from other cells in the corresponding boxes, creating a cascade of forced moves.

Breakthrough 2: Completing a first full row

One row eventually becomes determinable using only the “missing digits in this row” approach, aided by strong restrictions from its columns and boxes. When that happens, filling that row instantly reduces candidates in:

• its 2×3 boxes (finishing or nearly finishing one of them), and
• the intersecting columns (which now may have only one place left for some digits).

This is the turning point where the puzzle transitions from “open” to “tight.”

Breakthrough 3: Box‑line interactions

In a 6×6 Sudoku, box‑line interactions are very powerful. A typical pattern you’ll notice is:

In a box, digit X can only go in one row of that box.
Therefore, in that full row, X cannot appear outside the box
in any other column of the same row.

Using this logic on Box 2 and Box 5 in this puzzle, several candidate digits are removed from other cells, revealing new singles in both rows and columns. This domino effect continues until both middle rows (R3 and R4) become almost fixed.

8. The endgame: cascades of singles

Once you have two or three rows fully solved, the remaining unsolved cells are heavily constrained. The final steps follow a clear pattern:

Step A: Complete remaining boxes

For any nearly complete box (5 digits known and 1 missing), simply identify the last digit:

Box example:
Digits seen: 1, 2, 3, 4, 6
Missing:     5
So that final cell in the box must be 5.

Doing this in the last incomplete boxes resolves them one by one.

Step B: Finish columns using the ‘missing digits’ rule

After boxes tighten, some columns will look like this:

Column pattern example:
Ck: 1  .  3  .  5  6
Missing digits: {2, 4}
If 2 is already in the row of one empty cell,
that cell cannot be 2, so it must be 4.
The other empty cell becomes 2.

Repeating this in each incomplete column finishes them off and sets the last few row digits.

Step C: Final row clean‑up

The final unsolved row typically ends up like:

Rj: 1  5  .  3  4  2
Missing digits: {6}
So the remaining cell is forced to 6.

At this point, all rows, columns, and 2×3 boxes contain digits 1–6 exactly once, and the puzzle is solved.

9. Recap of the solving strategy for LinkedIn Mini Sudoku #152 (Precision)

For this specific LinkedIn Mini Sudoku (Question ID 152, Precision, 6×6 layout), the logical path uses only classic techniques:

• Missing‑digit scans in rows and columns to find naked singles.
• Box completion once a 2×3 box has five digits filled.
• Box‑line interactions to eliminate candidates in intersecting rows/columns.
• Simple candidate elimination cascades as each new digit tightens the rest of the grid.

If you followed these steps on the original grid, every cell can be reached purely by logic, with no guessing. To verify your work or see the final arrangement of all digits, refer to the dedicated solution page for LinkedIn Mini Sudoku #152 (Precision).

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