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Sudoku Play
A playable 9x9 Sudoku engine with uniquely-solvable generation and real logical hints
Unify Dynamics LLC
Tools7read-only
Sign-inNoneno account, no key
Data keptNoneprocessed in memory
PriceFreeoptional Pro limits
StatusLiveMCP + REST
Works withMCP · RESTany agent
Try asking
Real questions, and the tools your agent calls to answer them.
Let's play sudoku
Tools called
new_puzzleGive me a hard sudoku puzzle
Tools called
new_puzzlePut a 5 in row 3, column 4
Tools called
set_cellGive me a hint
Tools called
get_hintIs this solved correctly?
Tools called
check_solutionShow me the solution
Tools called
solveShow me the board
Tools called
render_boardAbout
Sudoku Play is a fully local, playable 9x9 Sudoku engine. new_puzzle generates a puzzle at a chosen difficulty (easy, medium, hard, expert) with a mathematically proven unique solution. set_cell fills or clears a cell, rejecting moves onto given clues or moves that conflict with a digit already visible in the same row, column, or box. get_hint runs real constraint-propagation logic -- naked singles, then hidden singles, then a solver-derived fallback -- and explains why the suggested value is forced. check_solution reports completeness and validity. solve runs the full backtracking solver and returns the unique answer grid. render_board draws the grid as text. Stateless -- no server-side puzzle storage, the caller passes state between calls. Keyless; fully local; zero upstream calls; nothing stored.
Sources: Original, hand-authored content. Fully local, zero upstream calls.
Privacy
The publisher, Unify Dynamics LLC, states that tool inputs are processed in memory and not retained.
Data not collectedNo account, no profile, no stored prompts or results.
What it can do
7 tools, grouped by job. Every one is read-only or compute-only.
- New puzzleGenerate a new 9x9 Sudoku puzzle with a mathematically proven unique solution, at the requested difficulty.
- Set cellFill or clear one cell.
- Get hintReturn one genuine logical deduction: a forced cell value and WHY it's forced (naked single, hidden single, or -- only if neither applies -- a…
- SolveRun the full backtracking solver on the puzzle's original clues and return the unique answer grid -- for verification, or for a player who wants…
- Check solutionCheck whether the grid is complete and whether every row, column, and box is a valid permutation of 1-9.
- Render boardRender the current grid as human-readable text with 3x3 box separators.
- Rules infoExplain Sudoku's rules, the difficulty levels, and how hints and generation work.
Information
PublisherUnify Dynamics LLC
CategoryGames & entertainment
LanguagesEnglish
Built forGlobal
CompatibilityAny MCP client · any agent · REST
Version0.1.0
MCP endpoint
https://sudokuplay.connectorbay.com/mcpREST APIopenapi.json
CountryWorldwide
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Documentation
Back to topWhat Sudoku Play is for
A fully local, PLAYABLE 9x9 Sudoku engine — puzzle generation with a mathematically proven unique solution, cell-by-cell move validation, real logical hints, and a full solver. Not a rules reference: it generates and lets you actually play real puzzle instances.
What it does
new_puzzle generates a fresh 9x9 puzzle at a chosen difficulty (easy, medium, hard, expert — fewer
given clues is harder). Generation fills a full random valid grid, then removes clues one at a time,
re-checking after every removal that exactly one solution still exists — so every puzzle is guaranteed
uniquely solvable, never ambiguous or unsolvable. set_cell fills or clears one cell, rejecting moves onto
given clues and moves that immediately conflict with a digit already visible in the same row, column, or
3x3 box. get_hint runs real constraint-propagation logic — it looks for a naked single (a cell with only
one legal candidate left) first, then a hidden single (a digit with only one legal cell left in some row,
column, or box), and only falls back to a solver-derived deduction if neither elementary technique applies
anywhere on the board — and always explains why the suggested value is forced. check_solution reports
whether the grid is complete and fully valid. solve runs the full backtracking solver on the puzzle's
original clues and returns the unique answer grid. render_board draws the current grid as text with box
separators.
How state works
There is no server-side game storage. Every call (other than new_puzzle and rules_info) takes the full
puzzle state (the exact object returned by the previous call) and returns a new one.
What it is not
Not a rules-explainer or technique reference — it generates and lets you play real, fresh puzzle instances with genuine constraint-satisfaction logic behind every hint, validation, and solve.
Privacy policy
Back to topSudoku Play — Privacy Policy
Effective 28 September 2026. Unify Dynamics LLC ("we", "us"), Menlo Park, California.
What Sudoku Play is. Sudoku Play is a connector (an MCP server and REST API) that AI assistants and personal agents call on your behalf to run a local, playable Sudoku engine — generating puzzles, checking cell entries, computing hints, and solving.
What we receive. The arguments of each tool call — the puzzle state you (via your assistant) pass back on every call, your requested moves and difficulty, and the technical headers needed to serve the request (an IP address or a client identifier supplied by the assistant, and a Pro API key if you have one) — plus standard server logs.
Everything is computed locally and nothing is stored. Sudoku Play has no database and no server-side puzzle storage of any kind. The entire puzzle state lives only in your conversation with your assistant, which passes it back to us on each call and receives an updated copy in the response. We do not persist it, log it, or use it for anything beyond computing that one response. No request is forwarded to any third party — there is no upstream call at all.
What we do not receive or store. We do not receive your name, your conversation with the assistant beyond the bare puzzle-state argument, or anything else about you. Each request is answered independently. Rate-limit counters (a client identifier and timestamps) are held in memory for at most 24 hours. Hosting-provider access logs (IP addresses and request paths, not request bodies) are retained for up to 30 days for security and abuse prevention.
Sub-processors. None — computation is entirely local to this server. Hosting: Vercel (United States regions).
Legal bases and your rights. Our processing is necessary to provide the service you request through your assistant. Because we store no personal data beyond short-lived logs, requests to access, correct or delete personal data are usually satisfied automatically; you can still contact agent@connectorbay.com and we will respond within 30 days. We do not sell or share personal information and do not use your data to train models.
Children. Sudoku Play is a general-audience service operated by the adult using the assistant.
Changes. We will post changes here with a new effective date.
Terms of service
Back to topSudoku Play — Terms of Service
Effective 28 September 2026. These terms govern use of the Sudoku Play connector ("the Service") operated by Unify Dynamics LLC ("we", "us").
- The Service. Sudoku Play is a stateless, playable 9x9 Sudoku engine — puzzle generation, move validation, hints, and a solver — accessed through an AI assistant or directly over MCP or HTTP. There is no server-side game storage: the caller holds and passes puzzle state between calls.
- Entertainment only. Sudoku Play is provided for entertainment purposes. Nothing in it constitutes advice of any kind.
- Acceptable use. Automated use within the published rate limits is welcome. Do not use the Service to disrupt, overload, or reverse-engineer the underlying infrastructure.
- Availability. The Service is provided "as is" without warranty. We may change, limit, or discontinue it at any time.
- Data. Our Privacy Policy describes what we process. In short: puzzle state is computed statelessly from what you send us and nothing is stored.
- Pro keys. Optional Pro API keys are issued at our discretion, are personal to the holder, and may be revoked for abuse.
- Liability. To the fullest extent permitted by law, Unify Dynamics LLC is not liable for any loss, injury, or damage arising from use of, or reliance on, the Service. Our total liability is limited to US $100.
- Governing law. California law; venue in San Mateo County, California.
- Contact. Unify Dynamics LLC · agent@connectorbay.com · https://connectorbay.com/sudokuplay
Support
Back to topSudoku Play support
Email agent@connectorbay.com. We answer within two business days.
- MCP endpoint:
https://sudokuplay.connectorbay.com/mcp - REST API:
https://sudokuplay.connectorbay.com/openapi.json - Live status: https://sudokuplay.connectorbay.com/health
When you report a problem, include the question you asked your agent, roughly when, and which agent you used (for example Claude, ChatGPT or Gemini). Never send us passwords, account numbers or ID numbers. Sudoku Play never asks for them.