4pc

4 player chess matches, and tuning for UCI engines.

A four-player chess engine built to play the strongest 4PC it can. NNUE evaluation, an alpha-beta core in C and a Python root. Perft-verified move generation, all five starting setups, and a browser board to play against it. Plays Teams; FFA rules implemented, FFA search in progress.

A Chess.com client for connecting UCI-compatible four-player chess engines.

Opening explorer, book manager, and opening-book generator for 4-player chess engines. Build, analyze, balance, merge, and generate opening books for 4PC engine development, testing, and self-play.

IronPhoenix is a high-performance C++20 four-player chess engine for Chess.com-style Teams, featuring PVS/Negamax search, transposition tables, SEE, LMR, history heuristics, quiescence search, FEN4 support, and UCI-style commands.