''Microchess'', by

Peter R. Jennings Peter R. Jennings (born 1950) is a Canadian physicist, scientist, inventor, software developer, computer chess programmer, and entrepreneur. He is best known for creating MicroChess, the first microcomputer game to be sold commercially in 1976. B ...

, was the first commercially successful chess program for microcomputers. Originally designed for the

MOS Technology MOS Technology, Inc. ("MOS" being short for Metal Oxide Semiconductor), later known as CSG (Commodore Semiconductor Group) and GMT Microelectronics, was a semiconductor design and fabrication company based in Audubon, Pennsylvania. It is mos ...

KIM-1 The KIM-1, short for ''Keyboard Input Monitor'', is a small 6502-based single-board computer developed and produced by MOS Technology, Inc. and launched in 1976. It was very successful in that period, due to its low price (thanks to the inexp ...

it was released on December 18, 1976. ''Microchess'', as small as it was in terms of program size, could still play passable chess on the KIM-1 with its

6502 The MOS Technology 6502 (typically pronounced "sixty-five-oh-two" or "six-five-oh-two") William Mensch and the moderator both pronounce the 6502 microprocessor as ''"sixty-five-oh-two"''. is an 8-bit microprocessor that was designed by a small te ...

microprocessor, 1

kilobyte The kilobyte is a multiple of the unit byte for digital information. The International System of Units (SI) defines the prefix '' kilo'' as 1000 (103); per this definition, one kilobyte is 1000 bytes.International Standard IEC 80000-13 Quant ...

of memory, simple hex keyboard, and

seven-segment display A seven-segment display is a form of electronic display device for displaying decimal numerals that is an alternative to the more complex dot matrix displays. Seven-segment displays are widely used in digital clocks, electronic meters, bas ...

. Selling it at a price of US$10, Jennings refused to sell the rights of the program to

Chuck Peddle Charles Ingerham Peddle (November 25, 1937 – December 15, 2019) was an American electrical engineer best known as the main designer of the MOS Technology 6502 microprocessor, the single-board computer, and its successor, the Commodore PET per ...

(president of MOS Technology) for $1000. It was the first software package to sell 50,000 copies. Jennings founded

Personal Software VisiCorp was an early personal computer software publisher. Its most famous products were Microchess, Visi On and VisiCalc. It was founded in 1976 by Dan Fylstra and Peter R. Jennings as Personal Software, and first published Jennings' Microch ...

to publish ''Microchess'' to the nascent microcomputer market. Money made from ''Microchess'' and other software projects allowed Jennings, together with

Dan Fylstra Dan Fylstra is a pioneer of the software products industry. A graduate of the Massachusetts Institute of Technology, in 1975 he was a founding associate editor of ''Byte'' magazine. In 1978 he co-founded Personal Software, and that year reviewed ...

, to launch

VisiCorp VisiCorp was an early personal computer software publisher. Its most famous products were Microchess, Visi On and VisiCalc. It was founded in 1976 by Dan Fylstra and Peter R. Jennings as Personal Software, and first published Jennings' Microc ...

company, and underwrite the development of

VisiCalc VisiCalc (for "visible calculator") is the first spreadsheet computer program for personal computers, originally released for Apple II by VisiCorp on 17 October 1979. It is often considered the application that turned the microcomputer from a hob ...

, the first

spreadsheet A spreadsheet is a computer application for computation, organization, analysis and storage of data in tabular form. Spreadsheets were developed as computerized analogs of paper accounting worksheets. The program operates on data entered in ...

. ''Microchess'' was later expanded into a more fully featured program with graphics for the

TRS-80 The TRS-80 Micro Computer System (TRS-80, later renamed the Model I to distinguish it from successors) is a desktop microcomputer launched in 1977 and sold by Tandy Corporation through their Radio Shack stores. The name is an abbreviation of ' ...

Apple II The Apple II (stylized as ) is an 8-bit home computer and one of the world's first highly successful mass-produced microcomputer products. It was designed primarily by Steve Wozniak; Jerry Manock developed the design of Apple II's foam-m ...

Commodore PET The Commodore PET is a line of personal computers produced starting in 1977 by Commodore International. A single all-in-one case combines a MOS Technology 6502 microprocessor, Commodore BASIC in read-only memory, keyboard, monochrome monitor, ...

and

Atari 8-bit family The Atari 8-bit family is a series of 8-bit home computers introduced by Atari, Inc. in 1979 as the Atari 400 and Atari 800. The series was successively upgraded to Atari 1200XL , Atari 600XL, Atari 800XL, Atari 65XE, Atari 130XE, Atari 800XE, ...

computers. It was also licensed to Novag for its dedicated ''Chess Champion Mk II'' in 1979.

Reception

BYTE The byte is a unit of digital information that most commonly consists of eight bits. Historically, the byte was the number of bits used to encode a single character of text in a computer and for this reason it is the smallest addressable uni ...

'' in 1981 stated that when chess programs such as ''Microchess'' appeared, "we all laughed and proceeded to demolish them ... microcomputer chess programs had a poor reputation". Tim Harding in 1985 called ''Microchess'' "dreadful".

References

External links

Information on the history of Microchess, manuals, and complete source code

1976 video games Chess software Apple II games Atari 8-bit family games Commodore PET games TRS-80 games {{Software-stub

Reception

See also

References

External links