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+ChessFriend
+===========
+
+A chess engine written in Rust.
+
+The project is divided into crates for major components of the engine. These
+crates are collected in a Cargo workspace. All crates have the `chessfriend_`
+naming prefix. The directory structure omits this prefix, and I also frequently
+do when referring to them.
+
+
+
+## Engine Crates
+
+The engine is divided into several crates, each providing vital types and
+functionality.
+
+
+
+### `core`
+
+A collection of types for representing core concepts in a chess game and the
+engine. Types like `Color` (player or piece color), `Shape` (the shape of a
+piece: knight, etc), `Piece` (a piece of a particular color and shape), and
+`Score` (for scoring a board position) live here.
+
+
+
+### `bitboard`
+
+Implements an efficient BitBoard type. Bitboards use a 64-bit bit field to mark a
+square on a board as occupied or free.
+
+
+
+### `board`
+
+Implements a `Board` type that represents a moment-in-time board position. FEN
+parsing and production lives here.
+
+
+
+### `moves`
+
+The `Move` type lives here, along with routines for encoding moves in efficient
+forms, parsing moves from algebraic notation, and recording moves in a game
+context. Additionally, the move generators for each shape of piece are here.
+
+
+
+### `position`
+
+Exports the `Position` type, representing a board position within the context of
+a game. As such, it also provides a move list, and methods to make and unmake
+moves.
+
+
+
+## Support Crates
+
+These crates are for debugging and testing.
+
+
+
+### `explorer`
+
+This crate implements a small command-line application for "exploring" board
+positions. I meant for this program to be a debugging utility so that I could
+examine bitboards and other board structures live. It has grown over time to
+also support more aspects of interacting with the engine. So you can also use it
+to play a game!
+
+
+
+### `perft`
+
+A small Perft utility that executes perft to a given depth from some starting
+position.
+
+
+
+
+
+## Building
+
+Build the engine in the usual Rusty way.
+
+```sh
+$ cargo build
+```
+
+
+
+
+
+## Testing
+
+Test in the usual Rusty way.
+
+```sh
+$ cargo test
+```
+
+The engine has a fairly comprehensive unit test suite, as well as a decent pile
+of integration tests.
+
+
+
+
+
+## Authors
+
+This engine is built entirely by me, Eryn Wells.