Introduction

Morpion Solitaire is a fast player and solver for the pencil-and-paper puzzle of the same name: a desktop and Web GUI plus a headless CLI, built for hunting records (the 5T world record is 178).

This book covers three things:

• Using it — installing, playing in the GUI, and the command line.
• The MSR format — a self-describing record format (overview, specification) meant to supersede the older Pentasol text format, with a reusable reference library.
• Internals — the architecture, the search algorithms, and the fixed-grid board.

Play online: https://morpion-solitaire.io · Source: https://github.com/sjourdois/morpion-solitaire

The project is a Cargo workspace of three crates — the GPL-3.0-or-later application and two permissively licensed libraries (the MSR format and a record corpus). See Architecture.