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r/sudoku↗

r/Sudoku: a place to learn it and enjoy it

This subreddit is for learning about and discussing the puzzle Sudoku and variants.

65k subscribers668 posts / mo in Sep 2026 (incl. ~1% by known bots)431 authors / mosince 2009

r/sudoku has 65k members (+43% over the last 12 months). It gets about 668 posts a month from 431 people. Top topics: Puzzle Help, Puzzle Hobbies and Puzzle Solving Adventures.

Free report

When to post on r/sudoku

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Visitors without an account can open 3 subreddit reports a day. The best time to post on r/sudoku, removal risk and the rest of the report are one step away.

Size and growth

How r/sudoku has grown

r/sudoku

Subscriber growth

Subscribers over time

+43%in 12 months · +7.1% in 3 months · +2.0% in 1 month
Oct 202664k
Growing64k subscribers
Data since Mar 2018Live · through Oct 2026
r/sudoku

Monthly activity

Posts, comments and authors per month

−16%vs Sep 2025 · −1.4% last 3 months vs the 3 before
Sep 2026668
QuieterPeaked at 933 in Jan 2026
Sep 2026: incl. ~1% by known botsData through Sep 2026 · October usually lands mid-November

What people talk about

Topics and brands on r/sudoku

Top topics

Share of the subreddit's posts

  1. Puzzle Help3.2%
  2. Puzzle Hobbies2.8%
  3. Puzzle Solving Adventures1.8%
  4. Stuck Gameplay Issues0.9%
  5. SolvingProblems0.6%

Brands people mention

Most-mentioned brands and sites, last 12 months

Can you post

Posting rules for r/sudoku

Which post types r/sudoku allows, the karma and account age it asks for, required flair, and every community rule — read from Reddit.

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Timing and removals

How often posts get removed on r/sudoku

The best day and hour for r/sudoku, how many posts moderators remove and which kinds, the shape of its year, and weekdays against weekends.

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What to post

What works on r/sudoku

Title and body length that does well on r/sudoku, and its mix of text posts, links, images, galleries and video.

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Who writes here

Who posts on r/sudoku

Gender and age of the people who write on r/sudoku, the countries and US states they live in, their jobs, and whether a few regulars carry the conversation.

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How they talk

What people ask for on r/sudoku

Requests for recommendations, help and alternatives on r/sudoku, its signature words and phrases, the brands and sites people link with counts, and the tone of the comments.

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The full report

See all of r/sudoku

Posts and activity for Sep 2026. Members from Reddit's subscriber counts. Read from the same data the app runs on. Our research