Sudoku Engine: Generator, Solver & Tutor
Pricing
from $8.00 / 1,000 results
The go-to Sudoku engine: generate unique puzzles (L1-L10), solve with human techniques, get step-by-step hints, analysis, and teaching traces. Built for apps, games, printables, and learning products.
Puzzle
puzzle
Optional
81-character board string (digits 1–9, empty cells as 0), row-major.
Solution
solution
Optional
81-character solved board string (digits 1–9).
Board
board
Optional
Solved or current board as an 81-character string (solve / teach family).
Solved
solved
Optional
Whether the human-logic solver finished the board.
Valid
ok
Optional
Validation result for validate operations.
Seed
seed
Optional
RNG seed used for generate when provided.
Analysis
analysis
Optional
Difficulty grading and technique summary for the puzzle or solution path.
{ "hasSolution": true, "hasUniqueSolution": true, "difficulty": "L3", "score": 12.4, "hardestTechnique": "Naked Pairs Strategy", "hardestRank": 3}Steps
steps
Optional
Human-logic solve steps (summary or detailed, depending on operation).
Candidates
candidates
Optional
Pencil marks: 81 arrays of remaining digits per cell.
Teaching step
step
Optional
Next teaching / hint step payload.
Technique
technique
Optional
Technique id or title for techniqueExample results.
Strategy
strategy
Optional
Resolved strategy title for technique examples.
Caption
caption
Optional
Short caption for a technique example.
Error
error
Optional
Present when the run failed validation or engine constraints.