morlock

module

v0.91.1 Latest Latest Go to latest Published: Dec 18, 2023 License: MIT

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Repository

github.com/herohde/morlock

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README ¶

morlock

Morlock is a hobbyist chess engine in Go. It supports a few standard techniques and protocols and is currently mainly used to re-implement the following historical chess engines:

TUROCHAMP (1948) by Alan Turing and David Champernowne

Turochamp is an implementation of Turing's original "paper" chess engine. Turochamp uses a full search with an unbounded quiescence search of "considerable moves" using material ratio and position play heuristics:

turochamp-1ply. Rating ~1300 (blitz/rapid).
turochamp-2ply. Rating ~1400 (blitz/rapid).

BERNSTEIN (1957) by Alex Bernstein, Michael de V. Roberts, Timothy Arbuckle and Martin Belsky

Bernstein is a re-implementation of the first complete chess engine: Bernstein's chess program on the IBM 704. Bernstein uses a selective search limited to 7 "plausible moves" for computational feasibility:

bernstein-2ply. Rating ~1200 (blitz/rapid).
bernstein-4ply. Rating ~1400 (blitz/rapid).

SARGON (1978) by Dan and Kathe Spracklen

Sargon is a re-implementation of Spracklens' early commercial chess engine. Sargon uses a full search with material exchange, king/queen pins and board control heuristics:

sargon-1ply. Rating ~1300 (blitz/rapid).
sargon-2ply. Rating ~1400 (blitz/rapid).
sargon-3ply. Rating ~1500 (blitz/rapid).
sargon-4ply. Rating ~1600 (blitz/rapid).

Each engine can be played 24/7 for free on lichess.org. They have quirks, blind spots and limitations, which is part of their charm -- and play at low search depths to entertain rather than win.

December 2023

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Path	Synopsis
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bernstein bernstein is an implementation of Alex Bernstein's 1957 IBM 704 chess program.	bernstein is an implementation of Alex Bernstein's 1957 IBM 704 chess program.
bernstein/bernstein
livechess-uci livechess-uci is an adaptor for using a DGT EBoard via LiveChess as a UCI engine.	livechess-uci is an adaptor for using a DGT EBoard via LiveChess as a UCI engine.
morlock
perft perft is a movegen debugging tools.	perft is a movegen debugging tools.
sargon sargon is an implementation of Dan and Kathe Spracklen's 1978 SARGON chess engine.	sargon is an implementation of Dan and Kathe Spracklen's 1978 SARGON chess engine.
sargon/sargon
turochamp turochamp is an implementation of Turing and Champernowne's 1948 TUROCHAMP chess engine.	turochamp is an implementation of Turing and Champernowne's 1948 TUROCHAMP chess engine.
turochamp/turochamp Package turochamp implements the evaluation and search heuristics used by TUROCHAMP.	Package turochamp implements the evaluation and search heuristics used by TUROCHAMP.
pkg
board Package board contain chess board representation and utilities.	Package board contain chess board representation and utilities.
board/fen Package fen contains utilities for read and writing positions in FEN notation.	Package fen contains utilities for read and writing positions in FEN notation.
engine
engine/console
engine/uci Package uci contains a driver for using the engine under the UCI protocol.	Package uci contains a driver for using the engine under the UCI protocol.
eval Package eval contains position evaluation logic and utilities.	Package eval contains position evaluation logic and utilities.
search
search/searchctl Package searchctl contains search functionality and utilities.	Package searchctl contains search functionality and utilities.