Sudoku and Crossword are two of the puzzles people reach for most, so it's natural to wonder how alike they really are. The short answer: Crossword is distant to Sudoku. Below we lay out what the two share, where they part ways, and whether the skills you have built on Sudoku will carry over.
- Grid: Rectangular, black-and-white
- Closeness to Sudoku: Distant
- Also called: Crossword Puzzle, Cryptic Crossword
What is Crossword?
A word grid where you fill the white cells with letters so every numbered Across and Down entry spells a word that matches its clue, and crossing words agree on their shared letters. Here are the rules in full:
- Black cells split the grid into white runs; each numbered run is an Across or Down entry.
- You write one letter per white cell so each entry spells the answer to its written clue.
- Where an Across and a Down entry cross, they share that cell's letter, so the two answers must agree.
What a crossword looks like
Black cells break the grid into white runs, each numbered where it starts. You fill the white cells with letters so every Across and Down entry matches its written clue — and because entries cross, a shared cell's letter has to fit both answers at once.
1-Across “CAT” and 2-Down “TOE” cross at the T, so that cell's letter must serve both answers — the one thing a crossword shares with a Sudoku cell that answers to row, column and box.
But that is where the kinship ends. A crossword is a test of what you know — the words, the wordplay, the trivia — while Sudoku hands you everything you need and asks only what you can deduce. Enjoy both, but don't expect your Sudoku technique to fill in a single clue.
What Crossword shares with Sudoku
- Both are grid puzzles filled one cell at a time, and both live on the same newspaper puzzle page — the two habits people pair most often.
- A crossing cell must satisfy two entries at once, echoing how a Sudoku cell must satisfy its row, column and box together.
- A confirmed letter, like a placed digit, ripples outward and unlocks the crossing entries.
How Crossword differs from Sudoku
- A crossword tests vocabulary and general knowledge — you must know the words; Sudoku needs no outside knowledge at all.
- Its clues are written in language and can be witty or cryptic; Sudoku has no clues to read, only the logic of the grid.
- Answers are words made of 26 letters with no "each appears once" rule; Sudoku places nine digits under strict no-repeat constraints.
Do Sudoku skills transfer?
Honestly, little carries across: a crossword rewards what you know, Sudoku rewards what you can deduce. The one shared discipline is respecting a cell that answers to two directions at once — the same "make every constraint agree" mindset, applied to letters instead of digits.
The verdict
Crossword and Sudoku share the grid and the puzzle page but almost nothing else: one is a test of vocabulary, the other of pure logic.
Prefer to stay with Sudoku?
If Crossword appeals, these Sudoku variants scratch the same itch and you can read up on each here: