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Alternatives

Products that do what Junction Nine does

A 3x3 puzzle with a solver-verified shortest solution

  1. 1
    Threes!95

    A tiny puzzle that grows on you

    2014

  2. 2

    Simple, yet challenging, block shifting game

    2022

  3. 3SA
  4. 4
    Twenty84

    Match tiles. Get to Twenty.

    2015

  5. 5SP

    2020 · slices.ovh

  6. 6AD
  7. 7NL

    I've been playing Wordle and remembered this puzzle game I used to play with my grandfather. It's inspired by the block puzzles in many newspapers but made to be shorter: just guess the nine letter word. So I made a quick thing to play with my family like we used to. I thought you guys might enjoy it.

    2022 · nineletterwordgame.com

  8. 8
    6398

    A puzzle-solving race against the world

    2021

  9. 9

    A simple open source puzzle game.

    2016

  10. 10MA

    2015 · github.com

  11. 11
    Numble3

    Wordle for numbers, with hot-and-cold feedback

    24d ago · numble.today

  12. 12PG
  13. 13AP
  14. 14MN

    This is an idea I’ve been kicking around for a long time, and I decided to finally code it up. In the same way that Scrabble decomposes words into letters, what if there was a game that decomposed letters into sub-shapes? There’s a lot of directions this could go, and I’m still exploring the possibility space. Enjoy. Suggestions welcome. It doesn’t have a real name yet.

    2024 · shovemedia.com

  15. 15BO

    2021 · blockoutunity.github.io

  16. 16IB

    It's like a mix between Picross (Nonograms) and Polyominoes. It's a minimalist puzzler which has no text, no tutorials (none required) and no ads set in a relaxing environment. App Store: https://itunes.apple.com/gb/app/shapeuku-shape-puzzle-game/i... Play Store: https://play.google.com/store/apps/details?id=com.dtbgames.s... I have a bulk load of Android promo codes to give away, so if you'd like one let me know! (Sorry iOS users, I have no free codes left!)

    2018

  17. 17CA

    Hi HN, I'd like to share a logic number puzzle game I created! It is somewhat reminiscent of Sudoku and Minesweeper, but with its own twist. The rules are simple but it can be quite challenging! Please enjoy :) The feedback on the game prototype was invaluable and I incorporated a lot into what I hope is a more polished version of the game. What's new: Introduced a daily puzzle challenge. Dark mode. Enhanced user experience with improved UI. I'd love to hear your thoughts on these updates. Feedback is always appreciated!

    2023 · cubisum.com

  18. 18NF

    Invite code: hackernews. No email required for signup. My friend group loves playing nonograms and competing against each other, but we always send each other screenshots of the solved game grid and time after the fact. So from the start, I knew I wanted leaderboards, replays, and shareable links. I also added PWA support so it can be added to the home screen on mobile and an offline play mode. No ads, analytics or nonsense, just nonograms. Some other goodies as well such as YouTube-like scrubber and KDE-based visualization in replays.…

    Feb 2026 · nonograms.siraben.dev

  19. 19IM

    This is a tetris style game where you need to fill 5×8 grid completely with 10 falling blocks. Simple game based on skill and logic. Feedback is much appreciated.

    Jan 2026 · playdropstack.com

  20. 20F2

    Hi everyone, I built FuseCells, a minimalistic logic puzzle game where every level is handcrafted (no procedural generation). It started as a personal challenge: design a clean rule-set and scale it to thousands of puzzles without losing difficulty balance. What’s unique: - 2,500 handcrafted levels across multiple grid sizes - Deterministic logic, no guessing required - A rule system inspired by constraint-solving and path-finding concepts - Daily Challenge + leaderboards (I added these to give the game a “reason to come back” without turning it into a grind) - Built end-to-end as a solo dev…

    Dec 2025 · igodia.dev

  21. 21M6

    I built a minimal browser game where you have to make 67 from four numbers. https://simondarcyonline.com/67/

    Dec 2025 · simondarcyonline.com

  22. 22PP

    I've been working on applying LLMs to long-context, verifiable problems over the past year, and today I'm releasing a benchmark of 62,000 pencil puzzles across 94 types (sudoku, nonori, slitherlink, etc.). The benchmark also allows for intermediate checks /rule breaks for all varieties at any step. I tested 51 models against a subset (300 puzzles) in two modes: single-shot (output the full solution) and agentic (iterate with verifier feedback). Some results: - Best model (GPT 5.2@xhigh) solves 56%. (~ half the puzzles are unsolved by any model) - Agentic solves average 29 turns. The…

    Mar 2026 · ppbench.com

  23. 23HM

    Hi All, This the second iteration of a multiplayer sudoku web-based game I built recently. Hope you like it! Features: 1) No login needed, 2) Web app, that can be added to home-screen as needed, 3) Works on Desktop (with arrow keys supported) & Mobile, 4) Share link with friends to invite to the game Game Rules: 1) New puzzle starts for everyone every 15 minutes, 2) Game ends if you run out of time, 3) Fill all empty tiles correctly before time runs out to win, 4) Incorrect moves will disable the board for a few seconds, with penalty increasing as you've fewer empty tiles remaining Get…

    2022

  24. 24AQ

    2015 · anysudokusolver.com

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