The Chessmaster chess engine is called The King, written by Johan de Koning of the Netherlands. It was introduced in Chessmaster 4000; the first edition featured a chess engine written by David Kittinger, who went on to develop the engines for Interplay's USCF Chess, WChess for the German company Millennium 2000, and Sierra Entertainment's Power Chess, Majestic Chess and Disney's Aladdin Chess Adventures. The second edition had an engine designed by Kate and Dan Spracklen of Sargon fame.
According to the September 2009 Swedish Chess Computer Association (SSDF) rating list, Chessmaster 9000 has an estimated Elo rating of 2718 on an Athlon-1200 PC. If multiple versions of other engines are stripped out of their list, Chessmaster 9000 ranks 14th among all engines tested. As of May 2008, Chessmaster 9000 remains the most recent version rated by the SSDF.
The latest version, Chessmaster 11th Edition, was released in 2007, and has lagged behind more current chess engines. CCRL places it 84th on its February 2017 list.
The King engine allows users to create new playing styles, also called "personalities", by manipulating several dozen different settings, such as King Safety, Pawn Weakness, Randomness, Mobility and others. Individual piece values can also be adjusted. Chessmaster 9000, for example, features over 150 different personalities ranging from International Grandmaster strength down to Stanley, a chimpanzee who, in most situations, plays completely random moves.
The personality feature has inspired many amateur computer chess enthusiasts to attempt to find more optimum personalities. In Chessmaster 10th Edition, the creation of new personalities has been made easier than before. The Stanley chimpanzee personality inspired the Stanley Random Chess Variant.
Reception
The combined sales of the Chessmaster series had reached 1 million copies by September 1996. The series surpassed 5 million units in sales by 2002, making it the highest-selling computer chess series ever at the time.
In 1989, Computer Gaming World found Chessmaster 2100's features "the clear winners" over Sargon 4, in 1992 reported that Chessmaster 3000 had added "a lot" to its predecessors, with new tutorial features and a variety of computer opponents making the game "a truly impressive sequel", and in 1994 approved of Chessmaster 4000 Turbo's new AI "personalities" based on historical chess players. 4000 Turbo received a perfect 10 out of 10 score from Electronic Entertainment.
In Japan, Famitsu magazine scored the 1991 Super Famicom version of the game a 23 out of 40, and the 1994 Game Boy version a 21 out of 40.
Critical reaction to the Chessmaster series has been mostly positive. GameSpot commented that "Chessmaster has remained the consummate standard in console chess games since the '80s." IGN said that "the series itself remains the best way to play and learn about chess on the PC."
Chessmaster: Grandmaster Edition, the most recent PC edition of the series, scored positive reviews, with PC Gamer saying: "this one-stop shop for an entire chess-playing and learning family should last until you're all grandmasters." Chessmaster 10th Edition holds an 84% rating on review aggregator site GameRankings. IGN gave Chessmaster 10th Edition a score of 8.4/10, calling it "the best chess game in town." GameSpot's review of Chessmaster 10th Edition said, "If you're looking for a good chess program that's packed with a plethora of features and all the bells and whistles, you'll be very happy with Chessmaster 10th Edition.
The mobile phone version of Chessmaster received a score of 9/10 from IGN, who called it "an absolutely superlative product that will be enjoyed for week after week by fans of the mental contest." IGN criticized the Nintendo DS version of Chessmaster: The Art of Learning for its lack of multiplayer, but gave it an overall positive review, with a score of 7.8/10. IGN criticized the "boring" presentation of the PlayStation Portable version of Chessmaster: The Art of Learning, but added that "there's no doubt that the information is valuable and can teach you the finer points of the game."
Although the Chessmaster engine is generally not as strong as the engines of other commercially available chess programs such as Fritz, critics have praised the Chessmaster series for its comprehensive tutorials aimed at players of amateur and moderate skill levels. In its review of Chessmaster 9000, IGN said that "the series has always distinguished itself with first-rate chess teaching tools," and welcomed the game's "appeal towards inexperienced and mid-level players. With all manner of tutorials, detailed analysis and exercises, the game helps ease newbies into the experience." GameSpot's review of Chessmaster 10th Edition commented positively on the game's "huge bundle of features aimed at everyone from the neophyte who's looking to learn the basics to the advanced wood pusher who may need practice for tournament play."
A common criticism of the series has been the lack of new features in successive installments. IGN's review of Chessmaster 10th Edition commented, "it simply doesn't add enough over any of the last two versions to make it a necessary upgrade."
Screenshots from the game Chessmaster 9000
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