LinkedIn 6x6 Sudoku #322: The Pro-Tips Speed-Run Guide

Pro-Tips Guide: LinkedIn 6x6 Sudoku #322

Listen up. You're staring at LinkedIn 6x6 Sudoku #322, and if you think this is just a smaller version of the classic, you're already losing time. This grid has a rhythm, and the key to cracking it in seconds is knowing where the Crucial Square lies. For this specific puzzle, the logic finally snaps open in Row 3, Column 5 (the cell with the pre-filled 6). That single 6 is the anchor that forces the rest of the middle band into place.

The Crucial Square: Row 3, Column 5

Why is this square the hero? Because in a 6x6 grid, your boxes are 2x3. The 6 in Row 3, Column 5 immediately eliminates the number 6 from every cell in Column 5 and Row 3. This creates a Hidden Single for 6 in the top-right 2x3 box (Rows 1-2, Columns 4-6). Without spotting this elimination path early, you'd be stuck guessing between 3 and 4 for that cell. Speed-runners don't guess; they cross-hatch.

Tactic Alert: Cross-Hatching in 6x6

Forget the giant 3x3 scan. In LinkedIn 6x6 Sudoku #322, you must Cross-Hatch within the 2x3 constraints. Take the number 4 for example. Look at the middle-left box (Rows 3-4, Columns 1-3). Row 3 already has a 4 in Column 2. Row 4 has a 4 in Column 2. The only place for 4 in that box is Row 3, Column 3. Boom. You just placed it without a pencil mark. That's Cross-Hatching: checking the row, column, and box simultaneously to find the only valid spot.

Hidden Singles: The Aha! Moment

Here's the trick that cracks the bottom band. Look at Row 5. It has 2, 3, 1, 5. Only 4 and 6 are missing. Now check Column 3. It already has a 4 in Row 3. So, the cell in Row 5, Column 3 cannot be 4. It must be 6. That is a Hidden Single. Once you lock in that 6, the rest of Row 5 falls into place: the last cell is 4. This single deduction unlocks the entire bottom-right 2x3 box.

How We Got the Final Answer

The final sequence wasn't magic; it was methodical elimination. We started with the Crucial Square (R3,C5) to anchor the middle. Then we used Cross-Hatching to fill the 4s in the left boxes. Finally, we identified the Hidden Single for 6 in Row 5 to unlock the bottom. The solution grid is:

[[4, 2, 6, 5, 3, 1],
 [5, 1, 3, 2, 4, 6],
 [3, 5, 2, 1, 6, 4],
 [6, 4, 1, 3, 5, 2],
 [2, 3, 4, 6, 1, 5],
 [1, 6, 5, 4, 2, 3]]