Sargon 4

Third in a series of chess games.

Origin The original SARGON was written by Dan and Kathleen 'Kathe' Spracklen in a Z80-based computer called Wavemate Jupiter III[1] using assembly language through TDL Macro Assembler. The name was originally written entirely in capitals because early computer operating systems such as CP/M did not support lower-case file names. Introduction SARGON was introduced at the 1978 West Coast Computer Faire where it won the first computer chess tournament held strictly for microcomputers, with a score of 5-0.[2][3] This success encouraged the authors to seek financial income by selling the program directly to customers. Since magnetic media were not widely available at the time, the authors placed an advert in Byte Magazine and mailed $15 photocopied listings that would work in any Z80-based microcomputer.[1] Availability of the source code allowed porting to other machines. For example, the March–April 1979 issue of Recreational Computing describes a project that converted Sargon to an 8080 program by using macros. Later the Spracklens were contacted by Hayden Books and a book was published.[4] Commercialization through electronic media When magnetic media publishing became widely available, a Navy Petty Officer, Paul Lohnes, ported Sargon to the TRS-80, altering both graphics, input, and housekeeping routines leaving the Spracklen's chess-playing algorithm intact. Paul consulted with the Spracklens, both living in San Diego at the time, to make the TRS-80 version an instant success with the help of Hayden Book's newly established software division: Hayden Software. Paul was not involved in further refinements to the TRS-80 version due to his reassignment to sea duty shortly after signing the deal with Hayden Software. In the early 1980s SARGON CHESS was ported to several earlier microcomputers, i.e. NASCOM (by Bits & PCs, 1981), Exidy Sorcerer, Sharp MZ 80K,[5] and many others. A complete rewrite was necessary later for the Apple II port, made by Kathleen's brother Gary Shannon. Both were published by Hayden Software. Sequels The Spracklens made significant improvements on the original program[1] and released Sargon II. In 1978 it tied for third at the ninth North American Computer Chess Championship despite being seeded ninth of 12 entries. Sargon finished only behind Belle and Chess 4.7, and defeated AWIT—running on a $5 million Amdahl mainframe—amazing the audience.[6][3][1] That year they published a series of articles in BYTE on computer chess programming,[2][7] stating "we think it would be nice if not everyone had to reinvent the wheel".[6] Sargon II was ported to a variety of personal computers popular in the early 1980s.[8] The game engine featured multiple levels of lookahead to make it more accessible to beginning chess players. BYTE in 1980 estimated that Sargon II had a 1500 rating at the highest tournament-time difficulty level, and speculated that it was the best chess program on sale, including dedicated devices.[9] Sargon 2.5, sold as a ROM module for the Chafitz Modular Game System, was identical to Sargon II but incorporated pondering.[10] It received a 1641 rating at the Paul Masson tournament in June–July 1979, and 1736 at the San Jose City College Open in January 1980.[3] Sargon 3.0 finished in seventh place at the October 1979 North American Computer Chess Championship. The competition had improved, but 3.0 drew against Cray Blitz and easily defeated Mychess, its main microcomputer rival. In December 3.0 easily won the second microcomputer championship in London.[3] In 1980, the Spracklens' Reversi game finished in first place at a computer tournament at Northwestern University, and in 1981 it finished in third place at the Santa Cruz Open Othello Tournament.[11] Sargon III was a complete rewrite from scratch. Instead of an exchange evaluator, this version used a capture search algorithm. Also included was a chess opening repertoire. This third version was written originally for the 6502 assembler and was commercially published by Hayden Software in 1983. Apple contacted the Spracklens and, after a port for 68000 assembly, Sargon III was the first third-party executable software for the Macintosh.[1] After the demise of Hayden Software, later chess programs were also released under the name Sargon, including Sargon IV (Spinnaker Software), Sargon V (Activision) and a CD-i title simply named Sargon Chess. The Spracklens concurrently wrote the engines for the dedicated chess computers produced by Fidelity Electronics, which won the first four World Microcomputer Chess Championships.

A fantasy adventure for beginners and grand masters. Three totally unique chessboards and themes make this program the ultimate challenge for novice and advanced players.

Chess Vs The Axis Of Evil is a chess game where the figures are swapped with parodies on real or fictional persons, e.g. George W. Bush, Osama bin Laden or Dr. Evil from the Austin Powers movies. Every time the player or the AI makes a move the character walks over the chess move and, if it beats another figure, shows a little fight animation. For better overview the moves itself are ordered on a classical top-down chess-board which is displayed on the lower right corner. The game features six chess boards, e.g. Saddam Hussein's palace.

Chessmaster 3000 provides a strong chess opponent with 168 openings and different types of playfields (2D, 3D, and War Room). The game can suggest moves and determine the player's rating. It also contains 151 replications of classic real-world matches, and a Mentor feature which can act as a personal chess tutor through a variety of practical techniques.

Extraordinary Chess game in three dimensions made entirely in machine code. If you have a voice synthesizer, you'll be able to hear the strokes being played.

Face off against the bridge troll in his bizarre game of chess! Decrypt, Twist and Enforce the rules as your devious opponent attempts to break them in King of the Bridge!

3D Chess is a one or two player, mouse controlled game. It features eleven computer opponents with various skill levels. traditional, modern, Egyptian, interstellar, and medieval chess sets and a skinnable interface. The game also has a Blitz Mode, three tutorial modes and a Chess Strategy Guide. Versions of this game with reduced functionality were included in some eGames' compilations such as Card & Board Games Deluxe Suite 2.

Play the ancient game of "Hnefatafl" in style on your PC, in Singleplayer mode against the AI or Multiplayer over the internet. "Hnefatafl" is a strategic, chess-like boardgame with assumed origins all the way back to the Viking era.

A two-player online (via Steam) enhanced Chess, in an edgeless landscape called "Kingland", with upgrades.