LinkedIn Sudoku
Fill the 6×6 grid so every row, column and 3×2 box contains 1 through 6 exactly once.
About LinkedIn Sudoku 6×6
LinkedIn Sudoku is a compact, 6×6 take on the classic puzzle. The board is split into six 3-wide × 2-tall boxes; you must fill every cell with a digit from 1 to 6 so every row, every column and every box contains each digit exactly once. The fewer numbers given up front, the harder the puzzle.
On Ludingo we ship 200 easy, 200 medium and 200 hard hand-curated Sudoku 6×6 puzzles — no daily limit, no LinkedIn account needed, no install. Each puzzle is uniquely numbered so you can share a link and race the same board with friends.
How to play
- Tap a cell to select it, then tap a digit 1–6 on the number pad to fill it.
- Every row must contain each of 1, 2, 3, 4, 5, 6 exactly once.
- Every column must contain each of 1, 2, 3, 4, 5, 6 exactly once.
- Every 3-wide × 2-tall box (outlined by the thick lines) must also contain each digit exactly once.
How to solve 6×6 Sudoku — strategy and techniques
Scan for near-complete units first. Any row, column or 3×2 box that already holds four or five digits can usually be finished on the spot — and every digit you place tightens the neighbouring units.
Chase one digit across the grid. Pick a digit that appears often, and for each box still missing it, eliminate the rows and columns where it already sits. A digit has only six homes in a 6×6 grid, so this usually pins it to a single cell.
Think in two-row bands. Each 3×2 box spans two rows and three columns, so within a band of two rows a digit must land once per box and once per row. Spotting which of the two rows a digit is “reserved” for eliminates three cells at a time.
Harder boards want pencil-work: when two cells of a unit can only hold the same two digits (a naked pair), those digits are excluded from every other cell of that unit. That single technique cracks nearly every hard Ludingo board — no guessing required.
Tips for faster solves
- Finish rows, columns and boxes that already have four or five digits before anything clever.
- Sweep one digit at a time across all six boxes — six placements and that digit is done.
- Use the bands: inside two adjacent rows, a digit appears once per box and once per row.
- Making errors? Slow down — every Ludingo puzzle is solvable without guessing.
Questions about LinkedIn Sudoku 6×6
What are the rules of 6×6 Sudoku?
Fill the 6×6 grid with digits 1 to 6 so each row, column, and 3×2 box contains every digit exactly once. The given clues are locked; only the empty cells can be filled. Every puzzle has exactly one valid solution.
How does difficulty work?
Difficulty is set by how many cells are pre-filled. Easy puzzles ship with roughly 24 clues, medium with about 18, and hard with around 12 — the fewer the clues, the more deduction is required to solve.
Do I need a LinkedIn account?
No. Sudoku on Ludingo runs entirely in your browser — no LinkedIn login, no install, no email. Sign-in only adds persistent stats and cross-device sync.
How is puzzle numbering shared?
Every puzzle has a stable ID like `easy_42` or `hard_3` that's the same on every device. Share the URL with a friend and they'll get the exact same board — perfect for comparing solve times.
Is 6×6 Sudoku easier than 9×9?
Generally yes — fewer cells and digits mean shorter deduction chains, which makes 6×6 ideal for quick sessions and for learning techniques that carry over to full-size Sudoku. Ludingo’s hard tier still packs a real challenge with minimal givens.
Can I correct a wrong digit?
Yes — select the cell and type a different digit, or use undo to step back move by move. Pre-filled clue cells are locked and cannot be overwritten.