Sudoku: offline open-source client

People searching for sudoku usually want a client they can install and trust, not another advertising page that wraps a store listing. Keep this puzzle install on GitHub Releases for darkstar79/sudoku when you want a named release binary, prove one local game, then change themes only after that path works.

Here sudoku means software that shows a grid, lets you flag mines, and keeps scores on a machine you own. The client is the GPL-3.0 product this guide maps. Source and downloads live on darkstar79/sudoku. The release door is GitHub Releases. Safe download path: download-safe path. Repo layout: GitHub overview. Which file: releases.

What the install job needs

An install job on a personal PC needs software that can open a grid, keep a custom puzzle size you understand, and leave store accounts for people who want Store achievements instead. You choose a local client, keep sources on Releases, and avoid surprise toolbars mid-setup. A desktop client for offline play reduces logins that only work while a vendor store stays up.

The client keeps that work on your machine. You install once, start a game on easy or a custom puzzle, place pencil marks, and leave the window running. The everyday win is fewer half-finished “best puzzle download” pages than chasing a new website for every session.

• Prefer GitHub Releases over adware download portals.
• Prefer the named Windows win64 exe; no winget id was found here.
• Expect a Qt window and a 64-bit session for the exe and AppImage.
• Document the update door after the first successful game.

Why this desktop path

Local board work fails when the installer comes from a renamed mirror and the install folder never gets written down. The client from Releases keeps filenames stable enough to put on a ticket: Windows win64 exe, Linux AppImages, Flatpak assets. Flatpak assets exist, yet this guide prefers the same tag as the Windows exe.

Microsoft Store puzzle still wins when you want Store integration. Browser sites still win when install rights are missing. Choose this install path when you want a GPL-3.0 Qt client that can play offline without a commercial account.

Install by operating system

Match the OS tab in the panel above. Windows prefers the win64 exe. Linux prefers the AppImage. Flatpak remains an UNVERIFIED alternate on the same tag. macOS has no release installer on the reviewed tag.

Longer OS paths: Windows, macOS, Linux AppImage, Flatpak. Machine chooser: for this computer.

Eight steps to first game

1. Open GitHub Releases for darkstar79/sudoku Open the official Releases page and confirm you are on a stable tag that ships Sudoku-*-win64.exe for this install path, not a renamed mirror setup from a review portal.
2. Download the Windows win64 exe first Prefer Sudoku-*-win64.exe for a normal Windows puzzle client install. No winget package id was found on this review date, so keep the Releases zip as the Windows door.
3. Or take the Linux AppImage or Flatpak on the same tag On Apple silicon, prefer (no macOS release installer). On Linux x86_64, prefer Sudoku C++-*-qt6-x86_64.AppImage from the same tag. Flatpak and Flatpak exist upstream and remain UNVERIFIED here.
4. Confirm Sudoku C++ opens Run the Windows installer, or chmod and run the AppImage, so the Qt window appears before you start a local puzzle.
5. Pick a difficulty or import a custom puzzle Choose one of five difficulties or paste an 81-character string. Keep the first puzzle simple.
6. Optional pencil marks and keyboard navigation Use pencil marks, undo/redo, and keyboard navigation after one mouse puzzle works. Training mode stays experimental.
7. Keep one update door Return to the same GitHub Releases filename for the next bump. Skip adware wrappers that only rank for the head term.
8. Optional Flatpak later A Flatpak asset ships on the same tag. Prefer the AppImage first so Windows and Linux desks share one tag family.

First hour checklist: installed. First-run habits: first run.

First hour after install

Success is a grid that accepts a click on a machine you control, not three download folders full of renamed setups. Launch the client, pick easy or a custom puzzle, then prove one filled cell before you chase pencil marks or keyboard shortcuts.

SmartScreen and Gatekeeper prompts are common on first launch. Prefer the Releases URL you typed yourself. Safety overview: is it safe. Keyboard detail: pencil marks and strategies.

How to choose a desktop client

A careful buyer asks where games live, whether source is public, which platforms the window supports, and whether the download door is a named GitHub asset. Store apps answer with accounts and achievements. Desktop clients answer with files and offline play.

Pick a local desktop client when you want custom puzzles on disk and play without a subscription. Pick a store app when you want Store achievements more than a Qt window. The criteria stay the same even if you later compare browser sudoku sites or other OSS clients.

• Can you install from a filename you can write on a ticket?
• Does the licence let you read the client source?
• Can you play offline after the first download?
• Do custom puzzles and themes stay under your control?

The client compared with other desktop options

The table below is a desk comparison, not a ranking of store listings. Microsoft Store puzzle wins at Store hooks. This desktop client wins at local Qt play with public source.

Microsoft Sudoku still wins when you want Store updates and achievements. Browser boards still win when install rights are missing. browser boards sites and other OSS clients still win on their desktops. The client is the install path when you want a GPL-3.0 Qt window, named Releases assets, and files on disk. Longer comparison: vs Microsoft Sudoku.

Free client vs paid seats

The client itself is free under GPL-3.0. GitHub Releases assets named above have no paywall for the client. You may still see ads or in-app purchases inside Microsoft Store puzzle if you keep that app as a fallback.

Store platforms sell extras and show ads. Those purchases do not replace a local puzzle client, and this guide does not sell those seats. If you already have a Microsoft account, keep it until a local habit sticks.

Mistakes that undo an install

Downloading a second Softonic copy to fix a blocked first run. Expecting Store achievements inside a Qt window. Skipping the first local game and jumping into training mode. Mixing Flatpak with the AppImage on the same user without notes.

• Take the exe, AppImage, or Flatpak from GitHub Releases, not a renamed portal.
• Prove one local game before chasing keyboard shortcuts.
• Write the update door on the machine ticket.
• Keep Store apps as a fallback, not as the installer.
• Do not invent a winget or brew id that was not found.

Fix each mistake the same way: one honest door, one proven game, one documented path. Switch habits: switch from the Store app.

Guides index

Install guides cover Windows, Linux AppImage, Flatpak, and macOS source. Setup guides cover first run, pencil marks, safety, and update/uninstall. Comparison and switch pages help when a Store app is already installed. Browse all: guides.

Repeatable desk habits

Write the update door on the machine ticket beside the OS version. Windows exe, AppImage, and Flatpak are different doors. Mixing them without notes creates duplicate installs and confused uninstalls after a reimage.

Family PCs, club laptops, and lab images all benefit from the same boring rhythm: one installer door, one install folder, one documented theme. That is how a local puzzle habit stays boring for everyday desks in a good way.

Everyday limits

The client does not replace a Store achievement ladder. It does not make a hard custom puzzle into an easy one. It does not remove the need to trust the zip or DMG you downloaded. Offline use still needs network for the first download.

Settings that matter early

Difficulty, pencil marks, and whether you play with mouse or keyboard matter more than decorative chrome. Prove a local game before you chase custom grids. Pencil-mark guide: pencil marks and strategies.

After the first game

Only after one game works should you add Flatpak or heavy custom puzzles. Keep Releases bookmarked. Prefer the same tag family that still ships your OS asset. Update guide: update uninstall.

Keeping the job name clear

Here sudoku means a local client you install and operate. A review portal that only ranks for the head term is still the wrong binary. Prefer Sudoku-*-win64.exe or the client-*-qt6-x86_64.AppImage, then prove one game before you batch strategies.

When someone pastes a random “best download” link into chat, ask for the GitHub Releases URL instead. The install path on this guide always returns to darkstar79/sudoku.

Store seats still win when purchasing requires vendor support and achievements. Browser-only boards still win when install rights are missing. browser boards sites still wins for operators who already live in that desktop. Choose the client when you want GPL-3.0 builds, exact Releases names, and a desk path that does not start with a signup.

Cell Quill publishes the install guide. Upstream the client remains at darkstar79/sudoku under GPL-3.0. When Releases change which OS assets appear, re-check the live list before you image a lab.

Lab and travel notes

Travel laptops benefit from a single documented installer door written beside the install folder. Lab images drift when someone installs a second mirror during a blocked SmartScreen prompt. Prefer returning to the same Releases URL instead of inventing a new download mid-flight.

Club machines should receive the client on hardware they control, plus a shared note for the update door. Shared desks should keep Store boards available as a fallback until the local habit sticks for the whole room.

Classroom images should pin the exact filename beside the OS version. After every reimage, prove one short local game before you call the machine ready. That habit catches vanished portable folders and adware shortcuts that reappear from old bookmark exports.

Command-line users who already live in Flatpak can keep that path. Treat the AppImage as the windowed path for teammates who need the same tag as Windows. The two can share habits when the room documents which path is official for demos.

How do I install sudoku on Windows?

Download the current Sudoku-*-win64.exe from GitHub Releases for darkstar79/sudoku and run the installer. No winget package id was found on this review date, so keep the win64 exe as the Windows install door. Guide: install on Windows. Keep one door so the next client bump stays honest.

Where should I download a sudoku app?

Prefer GitHub Releases for darkstar79/sudoku when you need the Windows win64 exe or the Linux AppImage. Skip Softonic-style wrappers that rename the setup for a search ranking. Details: download safe. Keep downloads on the project release list so the release binary matches the tag you expect.

Is this sudoku software free?

The client is free under GPL-3.0. GitHub Releases assets named above have no paywall for the client. Screenshots live under resources/ in the GPL-3.0 repo tree. This guide does not sell Store seats, and Microsoft Store ads or IAP stay separate from that client licence.

Can I switch into this sudoku client from the Store app?

Yes. Install the client, prove a local game, then keep the Store app as a fallback if you still want achievements. Guide: switch from the Store app. Comparison context: vs the Store app. Store scores do not transfer into a Qt window.

Does the desktop sudoku client work offline?

After the first download, the client can play offline with the installed exe or AppImage already on disk. You still need network for the first fetch, and for Flatpak updates later if you choose those doors. Offline habits: first run and first hour. A desk install does not require a store account.