Pikafish is an open-source Xiangqi (Chinese chess) AI engine designed to analyse and review games. Based on Stockfish, it uses NNUE neural networks and is presented by its developers as the strongest Xiangqi engine, with ongoing work to improve its playing strength. The project provides software for players who want to use an engine through a graphical interface, as well as standalone engine files for loading into another compatible program.

Pikafish runs on Windows, Linux, macOS and Android, with builds supporting different CPU instruction sets. Users can also analyse games directly in a browser, without downloading or installing software. The website offers downloads for computers, phones and tablets, along with guidance for choosing packages and getting started. Pikafish is free and open source, and is offered for non-commercial use under its stated licensing terms. The project shares its source code on GitHub, where users can browse the code, report issues or contribute. Players can also visit its Facebook page to ask questions, share feedback and suggest improvements.