In July 2021, the developers of the open source Stockfish chess engine filed a lawsuit against Chessbase alleging that Fat Fritz 2.0 is a derivative of Stockfish and is in violation of a "central obligation" of Stockfish's GNU General Public License.[12] In November 2022, a settlement was reached in which was agreed that the license obligations of the GPL-3.0 for the products Fat Fritz 2 and Houdini 6 have not been complied with. In the future, Chessbase will comply with the license terms and to adequately inform the public about the use of the Stockfish software in its products.[13]
The data suggest that Deep Blue spent a lot of time evaluating bad moves but overcame this weakness through brute force. In a match between Deep Blue and the Deep Blitz machine running Deep Fritz or Deep Shredder, it seems unclear which machine would win. Obviously, Kasparov did not evaluate 200 million chess positions per second when he defeated Deep Blue in game 1 of the 1997 match, thus the 200 million positions per second number is not a requirement to play chess at the word championship level. It seems likely that Deep Fritz, which is more efficient at filtering out weak moves, is a far more 'intelligent' chess program compared with Deep Blue's software.
Deep Fritz Chess Software
Download: https://jinyurl.com/2vCoE4
The top 20 humans (the 2700+ crowd) are managing a long string of drawn matches against computers, and the rest of the top-200 is averaging the same 35% to 40% score that they did a few years ago. So, amazing as it may seem, I don't see any evidence that the top computers are suddenly going to take over the chess world. Of course the top computers are improving, mostly through hardware and software upgrades, but somehow the top humans are improving just as fast, in other ways.
Fritz notched up the first major success in its meteoric career in Hong Kong, at the Computer Chess World Championship. Fritz, a floppy-based program running on a normal 386 PC, defeated Deep Blue in the deciding match, becoming in May 1995 the first PC software program in the history of computer chess to be named the World Champion. Soon, everybody was talking about Fritz's powerful game. The top players began to take the new challenge seriously. And Fritz continued to notch up more wins, emerging victorious from high-caliber tournaments in the next several years.
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