{"name":"io.github.vincentping/playsudoku","slug":"vincentping-playsudoku","title":"PlaySudoku","description":"Deterministic Sudoku puzzles, progress checks, logical hints, and step-by-step solutions.","url":"https://mcp.market/server/vincentping-playsudoku","rating":null,"grade":"C","score":67,"certified":false,"status":"active","category":"other","tags":[],"presence":{"score":5,"stars":null,"forks":null,"downloads_week":null,"last_push_at":null,"license":null},"uptime":{"percent":100,"checks":8,"ok":8,"last_checked_at":"2026-09-21T11:51:14.012Z","last_ok_at":"2026-09-21T11:51:14.012Z","latency_ms":212},"claimed":false,"transport":"remote","callable_via_gateway":true,"default_price_micros":0,"repository":null,"website":null,"version":"1.0.0","remotes":[{"type":"streamable-http","url":"https://mcp.playsudoku.us/mcp"}],"packages":[],"tools":[{"name":"check_progress","description":"Check a user's current progress against the correct solution.\nReturns factual information only: whether the puzzle is complete, whether all filled cells are correct,\nwhich cells are incorrect (with the entered digit), and how many cells remain empty.\nDoes not give hints or coaching — use explain_next_step for that.\nUse this when the user asks \"am I done?\" or \"did I make any mistakes?\"\nEvery response includes a solve_url where the same puzzle can be continued in the interactive solver.","write_action":false,"price_micros":0,"input_schema":{"type":"object","properties":{"puzzle":{"type":"string","description":"Original 81-char sudoku clue string (0 or . for empty cells)."},"progress":{"type":"string","description":"Current 81-char board state to check."}},"required":["puzzle","progress"],"additionalProperties":false,"$schema":"http://json-schema.org/draft-07/schema#"}},{"name":"explain_next_step","description":"Get the next logical solving step for a sudoku puzzle, optionally from a partially-filled state.\n\nTWO-BOARD MODE (puzzle + progress) — use when you know both the original clue grid and the user's current work:\n  puzzle: the original 81-char clue string (the given digits only, 0/. for empty cells).\n  progress: the user's current 81-char board — must keep all original clue digits in place.\n  This mode detects incorrect entries: if any user-filled cell contradicts the solution, the tool returns\n  incorrect_cells instead of a step hint, so the user can correct errors before continuing.\n  Use this when the user is solving a puzzle they received from get_sudoku_puzzle (puzzle is known).\n\nSINGLE-BOARD MODE (puzzle only, no progress) — use when the original clue grid is unknown (e.g. photo OCR):\n  Pass the user's current full board as puzzle with no progress argument.\n  The tool treats the board as both the clue grid and the current state, so it will not perform error checking\n  (it cannot distinguish given digits from user entries). It simply returns the next logical step.\n  Use this when you cannot separate the original clues from the user's entries.\n\nReturns: { technique, explanation, action, tutorial_links } on success, or { incorrect_cells, message } if errors found.\nUse this for step-by-step coaching — one hint at a time.\nEvery response includes a solve_url for continuing the same board interactively and, on success, tutorial_links for the named technique.","write_action":false,"price_micros":0,"input_schema":{"type":"object","properties":{"puzzle":{"type":"string","description":"Original 81-char sudoku clue string (0 or . for empty cells)."},"progress":{"type":"string","description":"Current board state (81-char string). Clue cells must remain unchanged. Optional — omit to get the very first hint."}},"required":["puzzle"],"additionalProperties":false,"$schema":"http://json-schema.org/draft-07/schema#"}},{"name":"get_sudoku_puzzle","description":"Get a random sudoku puzzle from the PlaySudoku.us collection.\nPuzzle is returned as an 81-character string: digits 1–9 for given cells, 0 for empty cells.\nThe response includes the techniques required to solve the puzzle and a solve_url to the interactive solver.\nDifficulties: easy (30–38 givens), medium (44–50), hard (50–55), expert (56–62), evil (56–62).\nOptional: pass a technique name (e.g. \"X-Wing\", \"Hidden Pair\") to get a puzzle that specifically requires that technique — useful when the user wants to practice a particular solving method.\nIf no puzzle at the requested difficulty uses that technique, the error message lists which difficulties do have it.\nUse solve_sudoku for a full step-by-step solution, or explain_next_step to get one hint at a time.\nEvery response includes a solve_url where the same puzzle can be continued in the interactive solver.","write_action":false,"price_micros":0,"input_schema":{"type":"object","properties":{"difficulty":{"type":"string","enum":["easy","medium","hard","expert","evil"],"description":"Puzzle difficulty. Choose based on the user's skill level."},"technique":{"type":"string","description":"Optional technique name to filter by (e.g. \"X-Wing\", \"Hidden Pair\", \"Naked Triple\"). The returned puzzle will require this technique to solve. Omit for a random puzzle of the given difficulty."}},"required":["difficulty"],"additionalProperties":false,"$schema":"http://json-schema.org/draft-07/schema#"}},{"name":"solve_sudoku","description":"Solve a sudoku puzzle completely with step-by-step logical deduction.\nInput: 81-character string of digits (0 or . for empty cells). Whitespace is tolerated.\nReturns: every solving step with technique name + human-readable explanation + action,\n         the final solution string, a technique summary (counts), and tutorial links.\nOnly uses logical techniques — never guesses. If the puzzle cannot be solved logically,\nthe steps will end before completion.\nUse this when the user wants to understand how to solve a puzzle from scratch.\nThe response includes a solve_url for continuing the same board interactively and tutorial_links for techniques used in the solution.","write_action":false,"price_micros":0,"input_schema":{"type":"object","properties":{"puzzle":{"type":"string","description":"81-character sudoku string. Digits 1–9 for given cells, 0 or . for empty. Whitespace is ignored."}},"required":["puzzle"],"additionalProperties":false,"$schema":"http://json-schema.org/draft-07/schema#"}}],"scan":{"score":67,"grade":"C","scanned_at":"2026-09-21T13:04:57.648Z","report":{"scannerVersion":"0.1.9","scannedAt":"2026-09-21T13:04:57.617Z","components":{"code":{"score":-1,"max":25,"notes":["remote-only server, no package to scan"]},"reliability":{"score":20,"max":20,"notes":["remote reachable in 266ms"]},"poisoning":{"score":15,"max":15,"notes":["4 tool descriptions checked"]},"auth":{"score":10,"max":15,"notes":["open endpoint, read-only tools"]},"maintenance":{"score":3,"max":15,"notes":["no repository listed"]},"identity":{"score":2,"max":10,"notes":["no repository or website to verify"]}},"findings":[{"id":"maint.no-repo","severity":"low","component":"maintenance","title":"No source repository listed"}],"inputs":{"probes":[{"url":"https://mcp.playsudoku.us/mcp","reachable":true,"authRequired":false,"latencyMs":266,"serverInfo":{"name":"PlaySudoku MCP","version":"1.0.0"}}],"packages":[],"repo":{"found":false},"icon":{"url":null,"source":"none"},"presence":{"stars":null,"forks":null,"downloadsWeek":null,"license":null,"lastPushAt":null,"score":5}}}},"grade_history":[],"reviews":[]}