UCI Feature Support

The Universal Chess Interface (UCI) protocol specifies how a Graphical User Interface (GUI) communicates with a chess engine. MadChess supports most but not all UCI features. See the table below for details.

In addition to the following standard UCI commands, MadChess supports custom commands.

Support	Command	MadChess Implementation
GUI To Engine
	uci	Display engine name and author name.
	debug	Display search statistics.
	isready	Respond readyok.
	setoption	Set engine option.
	register	Engine does not require registration.
	ucinewgame	Reset best move cache, killer moves, and move history.
	position	Set pieces on board.
	go wtime btime winc binc movestogo	Determine think time, search, return best move.
	go depth nodes mate movetime infinite	Search to a specific depth (ply), node count, mate in x moves, for a specific duration, or until stopped via stop or quit command.
	go searchmoves	Search only specified moves.
	go ponder	Pondering (thinking on opponent’s time) not supported.
	stop	Stop searching, return best move.
	ponderhit	Pondering (thinking on opponent’s time) not supported.
	quit	Exit program.
Engine To GUI
	id name / author	Display engine name and author name.
	uciok	Ready to receive commands.
	readyok	Ready to receive position.
	bestmove	Return best move.
	bestmove ponder	Pondering (thinking on opponent’s time) not supported.
	copyprotection	Engine is not copy-protected.
	registration	Engine does not require registration.
	info multipv depth seldepth time nodes score cp mate nps pv lowerbound upperbound hashfull currmove currmovenumber	Update each depth and every 250,000 nodes. Display hash utilization.
	info string	Display debug information (if debug on).
	info cpuload	CPU load is not shown. Assume it’s 100% on a single thread.
	option name uci_engineabout	Display engine name, author name, and website link.
	option name hash multipv uci_limitstrength uci_elo uci_analysemode	Analysemode true = 3 rep draw. Analysemode false = 2 rep draw.
	option name ponder	Pondering (thinking on opponent’s time) not supported.
	option name nalimovpath nalimovcache	Nalimov tablebases not implemented.
	option name uci_shredderbasespath	Shredder tablebases not implemented.
	option name ownbook	Opening book not implemented by engine. If you wish to use an opening book, enable it in the GUI instead.
	option name uci_showcurrline	Displaying currently analyzed line not implemented.
	option name uci_showrefutations	Displaying refutations of candidate moves not implemented.
	option name uci_opponent	Engine does not adjust its play based on opponent.
	option name uci_setpositionvalue	Setting the value of a position (for analysis) not supported.