LinkedIn Mini Sudoku vs Classic Sudoku on a 6x6 Grid

LinkedIn Mini Sudoku looks like a shrunken cousin of the puzzle you already know, and in some ways it is. But shrinking the grid does more than remove three rows and three columns — it changes the shape of the boxes, and that single change reshapes how eliminations work. If you've spent time with the Mini Sudoku tips guide or the how-to-play page, you already know the core techniques: hidden singles, naked pairs, box-line interactions. This guide sets those aside as background and instead walks through the comparison itself — what carries over from a square-box grid, what breaks, and which habits from the bigger puzzle you should drop the moment you sit down with six digits instead of nine.

The two grids side by side

Classic Sudoku is played on a 9×9 grid, filled with nine digits, split into nine square boxes. LinkedIn Mini Sudoku is played on a 6×6 grid, filled with the digits 1 to 6, split into six boxes shaped two rows by three columns. Different sizes, different box shapes, but the underlying rule is identical in spirit: every row, every column, and every box must hold each digit exactly once. That one-per-row, one-per-column, one-per-box constraint is the shared skeleton of both puzzles, and it's why every technique that works on one grid has some analogue on the other. The difference is in the geometry of the box, and that geometry is where this guide spends most of its time.

Rows and columns stop behaving alike

On a grid with square boxes, a row and a column relate to a box in the same way — each one crosses the box along one of its equal sides. Mini Sudoku's boxes are 2 rows by 3 columns, so a row and a column no longer treat a box symmetrically. Each row crosses exactly two boxes, while each column crosses three boxes. That asymmetry matters the moment you're eliminating candidates. A digit whose remaining candidates in a box are all confined to one row clears that digit from the rest of that row outside the box — but that row only touches one other box, so the elimination lands in a narrow strip. A digit confined to one column within the same box clears that column outside the box too, and since the column runs through three boxes total, the elimination reaches further across the grid. Square boxes never produce this split behavior, because a row and a column crossing a square box are interchangeable in shape. On Mini Sudoku they aren't, and noticing which kind of confinement you're looking at tells you how far the elimination will reach before you even follow it through.

A pair that clears two units at once

Here's a pattern that's easy to miss if you're used to square boxes: a box column on the 6×6 grid is exactly two cells long. That's short enough that a naked pair filling those two cells does unusually efficient work. If both cells in a box's column-slice hold the same two candidates and nothing else, those two digits are locked into that column-slice — which means they can be struck from the rest of the column running through the other boxes, and simultaneously from the rest of the box itself, since the pair already accounts for two of the box's six cells. One naked pair, two units cleared in a single pass. Any two cells that share a box and a line can do this, on either grid; what the short column-slice changes is how easy it is to see. Here the pair is the whole slice — two cells stacked inside one box — so when you spot two stacked cells with the same two candidates, clear the column and the box together instead of checking them one at a time.

Scanning six digits instead of nine

A hidden-single pass on Mini Sudoku means cycling through digits 1 to 6 instead of 1 to 9, and that shorter cycle changes the rhythm of a full scan. With fewer digits to hold in mind, a box shows its missing digits at a glance — five filled cells in a six-cell box leaves exactly one digit unaccounted for, and you can usually name it without writing anything down. The scanning order that works on a bigger grid still pays off here: singles first, since they're the cheapest technique and tend to chain into more singles as digits go in; naked pairs next, worked on the boxes with the most filled cells, since those have the fewest open candidates to sort through; then box-line interactions on any box that still has three or more empty cells. What changes is how often you complete that cycle. On a 6×6 grid a single placement ripples through nearby rows, columns, and boxes fast enough that you'll often finish a scan, place two or three digits, and need to start the scan over almost immediately rather than working steadily through a long list of untouched boxes.

A 9x9 habit to drop

This is the one instinct worth unlearning deliberately. A square box on a bigger grid has three rows running through it, so a solver used to that shape waits for a digit to turn up in two of those three rows, elsewhere in the grid, before pinning that digit to the third row inside the box — you need two confirmations before the third slot is forced. A Mini Sudoku box has only two rows. One appearance of a digit in either of those two rows, anywhere outside the box, is enough to pin that digit to the other row inside the box — you only need one confirmation, not two. Carry the old three-row habit over and you'll sit on a deduction that was already forced, wasting a scan waiting for a second confirmation that was never going to change the outcome. The column side of the box doesn't get the same shortcut: a Mini Sudoku box still has three columns, so pinning a digit to one particular column inside the box still takes two confirmations from outside, exactly the way the row check worked on the bigger grid. Knowing which axis of the box got shorter and which one didn't is the fastest way to stop second-guessing a deduction that's already locked in.

Practice these distinctions on an actual grid rather than in the abstract — try the daily Mini Sudoku page or check your logic against the Mini Sudoku solver once you think a cell is forced. If you're bouncing between LinkedIn's puzzles today, the full answers roundup has the rest of the day's grids waiting once you're done.