LinkedIn Mini Sudoku #91 (Passageway) – November 10, 2025 – Step-by-Step Solution Guide

LinkedIn Mini Sudoku #91 (Passageway) – Step-by-Step Solution

Welcome to the daily solution for LinkedIn Mini Sudoku, today featuring Question ID: 91, named Passageway, published on November 10, 2025. This 6x6 Sudoku challenge requires each row, column, and 2x3 section (box) to contain the digits 1–6 exactly once. Here’s a detailed walkthrough of how to logically deduce each cell’s value from the given clues.

Starting Grid

Let’s lay out the initial grid (left empty cells are marked as blanks):

|   | 1 | 2 | 3 | 4 | 5 |
|   |   |   |   | 1 | 2 |
|   |   |   |   | 3 | 4 |
| 4 | 5 |   |   |   |   |
| 2 | 6 |   |   |   |   |
| 3 | 4 | 5 | 2 | 6 |   |

Step 1: Solve for Obvious Singles

Begin by looking for rows, columns, or boxes where only one number is missing—this is often the quickest way to fill cells.

Row 1: Contains 1, 2, 3, 4, 5; the missing number is 6. So, the first cell (top-left corner) must be 6.

Row 5: Contains 2 and 6, but we can’t fill yet as four numbers are missing. Skip for now.

Column 5: Contains 4, 1, 3, and 2 are missing. Not immediately solvable.

Step 2: Examine Boxes (2x3 Sections)

Top-Left Box: Contains 1, 2, 3, 4, 5, and now we’ve added 6 (from Row 1). This box is complete.

Top-Right Box: Contains 1, 2, 3, 4. Missing are 5 and 6. The top-right cell in Row 1 is already 5, so 6 must go in Row 2, Column 6. But wait, Row 2, Column 5 is 1 and Column 6 is 2, so no immediate fill here.

Step 3: Move to Other Boxes

Bottom-Left Box: Contains 4, 5, 2, 6, 3, 4. We need to find numbers that fit without repeating in the row, column, or box.

Bottom-Right Box: Contains 3, 4, 5, 2, 6. The missing number is 1.

Step 4: Fill Rows Where Only One Cell is Missing

Row 3: We have 3 and 4 in the last two cells. Let's see what’s missing in the rest of the row. After filling in the first cell (top-left) as 6, let’s check what’s possible for the remaining cells in Row 3.

But looking at the grid, Row 3 still has four empty cells. Let’s check for possibilities in those.

Row 2: Let’s see what’s missing. Numbers present: 1 and 2 in the last two cells. Let’s determine which numbers can fit in the first four cells without repeating in their columns or their 2x3 box.

Let’s consider the first cell in Row 2. What numbers are missing from all possible candidates? Let’s see if any are forced by elimination in their column or box.

Step 5: Eliminate Candidates Using Columns and Rows

Check each empty cell for possible numbers by looking at the corresponding row, column, and box.

In Row 2, Column 1: Possible numbers (from row, column, box): 3 and 5.Row 2, Column 2: Possible numbers: 3 and 4.Row 2, Column 3: Possible numbers: 4 and 6.Row 2, Column 4: Possible numbers: 5 and 6.Row 3, Column 1: Possible numbers: 1 and 2.Row 3, Column 2: Possible numbers: 1 and 2.Row 3, Column 3: Possible numbers: 5 and 6.Row 3, Column 4: Possible numbers: 5 and 6.Row 4, Column 3: Need to check.Row 4, Column 4: Need to check.Row 5, Column 3: Need to check.Row 5, Column 4: Need to check.

At this stage, some cells only have two possible numbers, creating a Naked Pair, which can help eliminate possibilities in other cells.

Step 6: Use Naked Pairs and Box Interactions

Notice that in Row 3, the first two cells must be 1 and 2 (since these are the missing numbers in the row, and the other candidates are 5,6 in later cells).

Because 1 and 2 must occupy those two spots in Row 3, Columns 1 and 2, that immediately means that no other cell in those columns within the box can be 1 or 2.

Let’s suppose 1 is in Row 3, Column 1, and 2 is in Row 3, Column 2.

Now, look at the cells below (Row 4 and Row 5, Columns 1 and 2):

Row 4, Column 1 is 4; Row 5, Column 1 is 2. Wait, Row 5, Column 1 is 2, which is already filled, so Row 3, Column 1 can’t be 2 (since 2 is already in column 1 elsewhere). So Row 3, Column 1 must be 1, and Row 3, Column 2 must be 2.

| 6 | 1 | 2 | 3 | 4 | 5 |
|   |   |   |   | 1 | 2 |
| 1 | 2 |   |   | 3 | 4 |
| 4 | 5 |   |   |   |   |
| 2 | 6 |   |   |   |   |
| 3 | 4 | 5 | 2 | 6 |   |

Now, in Row 2, Column 1, the only possible number is 5 (since 1,2,3,4,6 are either in the row, column, or box).

Row 2, Column 1 = 5

This now forces Row 2, Column 3 to be 4 (the other possibility was 6, but that would repeat in the column).

Row 2, Column 2 is now forced to be 3 (the other possibility was 4, but 4 is already in the column).

Row 2, Column 4 must be 6.

| 6 | 1 | 2 | 3 | 4 | 5 |
| 5 | 3 | 4 | 6 | 1 | 2 |
| 1 | 2 |   |   | 3 | 4 |
| 4 | 5 |   |   |   |   |
| 2 | 6 |   |   |   |   |
| 3 | 4 | 5 | 2 | 6 |   |

Step 7: Continue Filling Based on Elimination

Now, look at Row 3. We need to place 5 and 6 in the remaining two cells (Columns 3 and 4).

In Row 3, Column 4, if we place 5, then Column 3 must be 6.

In Row 4, the missing numbers in the box are 1, 2, 3, 6. But looking at Column 3: the only missing numbers are 3, since 6 is already in Row 3, Column 3.

So Row 4, Column 3 = 3.

Now, Row 4, Column 4 must be 1 (the only remaining number for that box).

Row 4, Column 3 = 3
Row 4, Column 4 = 1

Now, in Row 6, the missing number is 1 (since 2,3,4,5,6 are present).

Row 6, Column 6 = 1

Now, let’s look at the center boxes:

In Row 4, Columns 5 and 6, the missing numbers are 2, 6, but 2 is already in Column 5, Row 2, and 6 is in Column 6, Row 2. Wait, no—let’s clarify:

Row 4, Columns 5 and 6: The numbers missing are 2 and 6 (since 3, 1, 4, 5 are in the row or box).

Looking at Column 5, 4 is at Row 1, 1 at Row 2, 3 at Row 3, and nothing at Row 4. Row 6, Column 5 is 6, so 6 cannot be at Row 4, Column 5. Therefore, Row 4, Column 5 must be 2, and Row 4, Column 6 must be 6.

Row 4, Column 5 = 2
Row 4, Column 6 = 6

Now, Row 5. The missing numbers are 1, 3, 4, 5. Let’s check Columns 3 and 4.

In Column 3, 4 is missing. In Row 5, Column 3, can it be 4? Let’s see: There’s already a 4 in Row 6, Column 3. Wait, no—Row 6, Column 3 is 5. Row 5, Column 3 can be 1 or 4.

Looking at Row 5, Column 4: The only possible number is 4, because 1,2,3,5,6 are already in the row, column, or box.

Row 5, Column 4 = 4

Now, back to Row 5, Column 3: The only remaining number is 1.

Row 5, Column 3 = 1

Now, in Row 3, Column 3 must be 6, and Column 4 must be 5.

Row 3, Column 3 = 6
Row 3, Column 4 = 5

That completes the grid!

Final Grid

| 6 | 1 | 2 | 3 | 4 | 5 |
| 5 | 3 | 4 | 6 | 1 | 2 |
| 1 | 2 | 6 | 5 | 3 | 4 |
| 4 | 5 | 3 | 1 | 2 | 6 |
| 2 | 6 | 1 | 4 | 5 | 3 |
| 3 | 4 | 5 | 2 | 6 | 1 |

Summary

This walkthrough demonstrates the logical reasoning behind each placement in LinkedIn Mini Sudoku #91 (Passageway), published on November 10, 2025. By focusing on box interactions, row/column elimination, and naked pairs, you can systematically fill every cell without guessing. Practice these techniques to speed up your Sudoku solving, and check out our daily solutions for more!