Question 1

How do I play 1to9 Puzzle?

Accepted Answer

Fill a 3×3 grid with the digits 1–9, using each digit exactly once. Every row, column, and both diagonals must sum to the clue values shown around the grid. One cell is pre-filled as a starting hint.

Question 2

What is the Mathematical Reasoning Score (MRS)?

Accepted Answer

MRS measures how efficiently you solved the puzzle. Each cell tracks how many attempts it took to place the correct digit — fewer attempts means a higher score. Placing every digit correctly on the first try gives a perfect score of 100%.

Question 3

How often does the puzzle change?

Accepted Answer

A new puzzle is published every day. Puzzles cycle through nine difficulty levels (1–9) so the challenge varies throughout the week.

Question 4

Do I need an account to play?

Accepted Answer

No account is needed to play. Sign in with Google to save your scores and track your performance over time in the charts and archive views.


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