Chess

This document serves as a user manual for the "Greenblatt Chess Program" (also known as "Machack"), which runs under the DEC time-sharing monitor for the PDP-6/10.

The manual outlines the various commands available for interacting with the program, including:

• Game Modes: Options to play as Black (PB), White (PW), or have the computer play against itself (PS).
• Utility Commands: Options to print the current board or game history, take back a move (U), or reset the game.
• Performance Settings: Commands to adjust the "width" of move examination and the depth of the search, with specific configurations recommended for "Hacker" mode versus "Tournament" mode.

Additionally, the document details the pseudo-standard notation required for user input, including how to designate pieces, how to represent standard moves versus captures, and how to execute special moves like castling. It concludes with a brief example of how to initiate and begin a game session.