How the two games compare
What a Sudoku player brings to the table
Rows and columns
You already read a square by its row and its column. That’s the whole game here.
Spotting what fits
Sudoku trains you to see which number a square needs. Here, that’s how you score.
Calm, careful moves
There’s no clock. Take your time and find the best square.
A puzzle every day
The Daily Puzzle gives you one board a day, like your morning Sudoku.
Which number fits here? Check the row, then the column.
A Sudoku player’s habit, scanning a square’s row and column for what’s allowed, is exactly how you find big moves in Crazy10s. The row below already has 2 + 5, so it needs a 3. The column has 6 + 1, so it needs a 3 too. One tile finishes both lines and scores twice.
- Someone plays back. Every move changes what your opponent can do next, and theirs changes yours.
- More than one right answer. Many moves are legal. The skill is finding the one that scores the most.
- A little luck. You play the tiles you draw, so no two games are the same.
One tile, two lines, 20 points.
2+5+3 across and 6+1+3 down.
They’re good at different things
Stick with Sudoku if…
- you want quiet time on your own
- you like a puzzle with one perfect answer
- you’d rather have no luck at all
Try Crazy10s if…
- you want to test your number sense against a person
- you like a game that’s different every time
- you want a daily puzzle and a game to play with friends
Four tips for Sudoku players
Hunt for crossings
The best squares finish a row and a column at once, like the 3 above.
Know what each line needs
A line with 6 + 1 needs 3 more: a 3, or a 1 and a 2. Keep a count as you scan.
Play the Daily Puzzle
One board, seven tiles, three tries: the closest thing here to a morning Sudoku.
Think one move ahead
Don’t leave a line your opponent can finish with one tile on a bonus square.
Crazy10s for Sudoku players
Is Crazy10s like Sudoku?
It uses the same skill, reading a square by its row and its column. But you play it against someone, and every line has to add up to exactly 10 instead of using each number once.
Can I play Crazy10s on my own?
Yes. Play the Computer at Easy, Medium or Hard, or try the Daily Puzzle, one board a day with three tries.
Do I need to be good at math?
If you can add up to 10, you can play. The game shows your points before you play a move.
Is there a daily puzzle?
Yes. The Daily Puzzle is the same board and tiles for everyone, new every day. Your best of three tries counts.
Is Crazy10s free?
Yes. It plays in your browser with nothing to download, and the Daily Puzzle needs no account.
Try number logic against a real opponent
Play a friend, a random opponent or the Computer. Or try today’s Daily Puzzle.