Update README.

Author: willwang-io

README.md

@@ -1 +1,34 @@
 # Solo Chess Solver
+
+A lightweight, browser-based Solo Chess puzzle solver built with Rust and Dioxus.
+
+## Features
+- Place pieces on an 8x8 board and clear them with right-click.
+- Generate a capture sequence that leaves one piece.
+- Review solutions step-by-step with visual cues.
+
+## How to use
+1. Select a piece from the palette.
+2. Click squares to place pieces; right-click to remove them.
+3. Review the generated capture sequence below the board.
+
+## Development
+
+### Prerequisites
+- Rust toolchain (stable).
+- Optional: Dioxus CLI for web development.
+
+### Run locally (web)
+```bash
+dx serve
+```
+
+### Build for production
+```bash
+dx build --release
+```
+
+## Constraints
+Solo Chess with at most two captures per piece is NP-complete[^1]. With memoization and other minor pruning strategies, solve time becomes noticeably longer with more than 15 pieces, but that is enough to solve all the puzzles from chess.com.
+
+[^1]: https://scale.iti.kit.edu/_media/resources/theses/ma_kolja_kuehn.pdf