sending arbitrary uci commands

[pallabbasu]

Hi,

I want to test my own fairy variant in fairy-stockfish and python-chess.

I want to send a few uci command to fairy-stockfish, without using chess.board(), as I do not wish any legality checking, also I am using symbols other than "pnbrqk". I simply wish to send uci commands to fairy-stockfish (or any uci engines).

Is there an easy way to do that in python-chess.

Say I want to send the following commands to begin with:

setoption name UCI_variant value myvariant
position startpos move e2e4
go movetime 3000

And get back the best-move.

best,
Pallab

[niklasf]

Hi. Implementing a custom command is reasonably straight-forward:

python-chess/chess/engine.py

Lines 1435 to 1447 in 5535067

	async def ping(self) -> None:
	class UciPingCommand(BaseCommand[UciProtocol, None]):
	def start(self, engine: UciProtocol) -> None:
	engine._isready()
	def line_received(self, engine: UciProtocol, line: str) -> None:
	if line == "readyok":
	self.result.set_result(None)
	self.set_finished()
	else:
	LOGGER.warning("%s: Unexpected engine output: %r", engine, line)
	return await self.communicate(UciPingCommand)

However much of the machinery to parse moves etc. is useless in this particular use case, so I am not sure if you gain much from using python-chess.