Nonogram Revisited

A modern TypeScript Nonogram (Picross / Griddlers) solver, generator, trainer, and analyzer with a 100% deterministic human-step solving engine, a responsive PWA, a 4-stage Socratic AI Coach, and a Contradiction Prover. Licensed GPL-3.0-or-later.

Engine

Nine human-style solving techniques in strict difficulty order, from Full Line & Zero Line up to Line Contradiction (Bifurcation). Every puzzle is rated deterministically and verified unique without guessing whenever possible.

PWA

Play offline. The React app runs the solver and generator in a Web Worker and stores games and settings in localStorage.

Open the app →

Site

• Technique guides with inline SVG line-deduction diagrams
• Learn pages: how Nonograms work and a solving routine
• Manual: the app's tools, Coach, Why? prover and shortcuts