Houdini 2.0c is now available! It's superb - I've tried to match it with Fritz 12 in a 3 round matches and won all of them. Super fast on a Vista, 2.1 Gz, 4RAM system. Tactically brilliant & positionally 'kick-a*s'. Have you try it yet? Tell me in the comments - what's your favorite chess engine?
There are hundreds of freely available chess engines which conform to one of the above communication protocols. Many run on Windows or are open source. The top 10 strongest, freely available engines are listed here.
|Engine (strongest version)||Author (Country)||Elo|
|Houdini v1.5a||Robert Houdart (Belgium)||3309|
|Critter v1.4||Richard Vida (Slovakia)||3305|
|Komodo v3.0||Don Dailey||3280|
|IvanHoe v9.47b||Yakov Petrovich Golyadkin, Igor Igorovich Igoronov, Robert Pescatore, Yusuf Ralf Weisskopf, Ivan Skavinsky Skavar||3270|
|Fire v1.31||Norman Schmidt (USA)||3260|
|Stockfish v2.1.1||Tord Romstad (Norway), Marco Costalba (Italy) & Joona Kiiski (Finland)||3259|
|Spike v1.4 Leiden||Volker Böhm and Ralf Schäfer (Germany)||3149|
(last free version)
|Vasik Rajlich (Czech Republic)||3126|
|Spark v1.0||Allard Siemelink (Netherlands)||3097|
|Protector v1.3.6||Raimund Heid (Germany)||3070|