![houdini 6.03 vs stockfish 220818 portable game notation houdini 6.03 vs stockfish 220818 portable game notation](https://i.ytimg.com/vi/KqCa0yqO87U/mqdefault.jpg)
How about Stockfish? This one seems to be free of the accusations because it's an open source program that freely admits its origins in the strong and popular open source engine Glaurung. I see ChessVibes covered this a few weeks ago.
#Houdini 6.03 vs stockfish 220818 portable game notation code
More to the point, proving it can force you to reveal things about your code you're rather not reveal. This is not rare, but it can be hard to prove. The controversy is over whether or not they are clones of Rybka based on reversed engineering Rajlich's code, which is what he seems to be saying. I'm not sure of Permanent Brain is still holding court in the Ninja boards, but his posts on these things are always informative.) Ever heard of IPPOLIT? Robbolito? Firebird? This is a series of engines, all very strong and apparently with a common source. (Okay, maybe there are more than a few dozen of them, but sometimes it does feel that way. Lately, however, the computer chess message boards where a few dozen hardcore multicore ultra-geeks generate enough posts daily to utilize the bandwidth of a midsize European country, have been abuzz with fresh names and new competition. Since 2005, with a few blips, Rybka as been more like Optimus Prime. (Five years being a very long time for dominance in just about any tech field, barring monopolistic practices.) For a decade, since the obsolescence of DOS programs, the programs Fritz, Junior, and Shredder mostly took turns as primus inter pares.
![houdini 6.03 vs stockfish 220818 portable game notation houdini 6.03 vs stockfish 220818 portable game notation](https://i.stack.imgur.com/NJVbZ.png)
Rybka means "little fish" in Czech and Polish, but the engine by Vasik Rajlich has been the big dog in computer chess for a long time now.
![houdini 6.03 vs stockfish 220818 portable game notation houdini 6.03 vs stockfish 220818 portable game notation](https://mpue.github.io/SimpleChess/ChessGUI/images/screenshot.png)
It's amusing that the term "fish," which is frequently used to refer to weak chessplayers at least in American English ("bunny" is also good in the UK), has become a popular naming theme for top chess programs.