How the two games compare
What a Kakuro player brings to the table
Quick sums
You already add small numbers in your head without thinking about it.
Across and down
A number in Kakuro counts in two runs. Here a tile counts in every line it touches.
Known combinations
You know which numbers make which sums. Here there’s just one sum to know.
A puzzle every day
The Daily Puzzle gives you one board a day, the same for everyone.
In Kakuro, 10 in four squares has one answer. Here it has many.
Kakuro’s rules are strict: no repeats, no zeros, so a clue of 10 across four squares can only be 1, 2, 3 and 4. Crazy10s lets numbers repeat and has a 0, so there are many ways to make 10. The puzzle isn’t finding the only answer. It’s finding the best one for the tiles in your rack.
- Someone plays back. Every tile you place opens or closes lines for your opponent.
- The grid grows. There are no black squares. The board takes shape as you both play.
- Points, not just a solution. Finish more lines, use the bonus squares, and beat your opponent’s score.
All legal lines here.
Repeats and 0 are allowed, so 10 can be made many ways.
They’re good at different things
Stick with Kakuro if…
- you love a strict puzzle with exactly one solution
- you want to work through it quietly on your own
- you like harder sums than 10
Try Crazy10s if…
- you want those quick sums in a game against a person
- you like a board that’s different every time
- you’d enjoy a daily puzzle with a score to beat
Four tips for Kakuro players
Forget “no repeats”
5 + 5 is fine here, and so is 1 + 1 + 8. Don’t skip a move because of a double.
Use the 0
A 0 adds nothing, so it can stretch a finished line or fill a gap in a bridge.
Score two lines at once
Like a Kakuro cell that sits in an across run and a down run, a tile scores in both of its lines.
Keep a wild for later
A wild plays as any number. It’s worth most on a move that finishes several lines.
Crazy10s for Kakuro players
How is Crazy10s different from Kakuro?
Kakuro is a puzzle you solve alone, with a different sum for each run and no repeated numbers. In Crazy10s two players build the board together, every line adds up to exactly 10, and numbers can repeat.
Is it hard?
The rule is simple: every line adds up to 10. The skill is finding the move that scores the most.
Can I play on my own?
Yes. Play the Computer at Easy, Medium or Hard, or try the Daily Puzzle, one board a day with three tries.
Is Crazy10s free?
Yes. It plays in your browser with nothing to download.
Can I play with a friend?
Yes. Start a game, choose Invite a Friend and send the link. Your friend can join as a guest.
Put your sums to the test
Play a friend, a random opponent or the Computer. Or try today’s Daily Puzzle.