Chess Assistant 17 & Chess Assistant 17 PRO
Chess Assistant 17 combines advanced game database management, analysis powered by the strongest Houdini 5 engine, the advanced Tree mode, Opening Encyclopedia and many other features.

Chess Assistant 17 with Houdini 5 — $94.95 / €75.96
Chess Assistant 17 PRO with Houdini 5 PRO — $145.95 / €116.76

Christmas Offer in Effect till January 25

Dear customers,
The Christmass deal for 25 training programs is still in effect, and will be active till January 25. Both download and CD/DVD versions receive 25% discounts! A perfect opportunity to buy presents for your friends and relatives.
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Chess King Released

ckh2p_dvdChess King, a new program combining today’s strongest chess engine, enormous databases and excellent training potential, has been released.
A professional chess software system, the largest game database available GigaKing, the strongest chess engine in the market Houdini 2, 1500 chess puzzles for all chess levels, a unique random playing mode, and much, much more - all in one package!
You can order DVD versions of Chess King and Chess King Pro in our shop:

  • Chess King with Houdini 2 (DVD) - $89.00 $49.00
  • Chess King Pro with Houdini 2 Pro (DVD) - $139.00 $99.00
  • Or you can buy download versions of Chess King and Chess King Pro:

  • Chess King with Houdini 2 (download) - $89.00 $49.00
  • Chess King Pro with Houdini 2 Pro (download) - $139.00 $99.00
  • New Chess Programs Avalilable

    A new series of training courses in Peshk@ interface has been released! You can either buy them as separate products:

  • Chess Guide for Club Players - $25.00
  • Chess Guide for Intermediate Players - $25.00
  • Chess Tactics in Opening Games - $25.00

    or as one kit:

  • Chess Training Kit - $49.95
  • New Articles

    New articles by Dadi Jonnson are available in our Articles section:
    Sending Games and Position to IDeA - how to have IDeA analyze the position you want;
    Houdini 2 Aquarium - covering improvements in Aquarium, as well as the new Houdini 2.0 engine;
    WBCCC: Victorious With Aquarium - a detailed article about World Blitz Correspondence Chess Championship.

    London Chess Classic 2011

    londThe London Chess Classic takes place December 3rd-12th at the Olympia Conference centre in Kensington. Round robin. Participants: Magnus Carlsen (Norway, 2826), Viswanathan Anand (India, 2811), Levon Aronian (Armenia, 2802), Vladimir Kramnik (Russia, 2800), Hikaru Nakamura (USA, 2758), Michael Adams (UK, 2734), Nigel Short (UK, 2698), Luke McShane (UK, 2671), David Howell (UK, 2633).
    Time control: 2 hours for 40 moves, the 1 hour for 20 moves and 15 minutes for finishing the game, adding 30 seconds for every move starting with the 61th.
    3 points for winning a game, 1 point for a draw, 0 points for losing. No draw propositions.

    Games: Round 1 [download PGN], Round 2 [download PGN], Round 3 [download PGN], Round 4 [download PGN], Round 5 [download PGN], Round 6 [download PGN], Round 7 [download PGN], Round 8 [download PGN], Round 9 [download PGN]

    Houdini 2.0c Update

    Fixes
    • Nalimov EGTB probing would not recognize KvK end game.
    • Nalimov EGTB: Houdini would exit when a corrupt table base file was encountered.
    • On some Windows systems the internal timer would overflow after approx. 30 minutes.

    Improvements and New Features
    • New MultiPV_cp option to limit multi-PV analysis to moves within a range of the best move.
    • New FiftyMoveDistance option to make the 50-move rule kick in earlier.
    • New UCI_Elo and UCI_LimitStrength options as UCI standard-compliant alternative to Strength option.
    • Houdini now exits when it detects that the communication with the GUI is broken.

    Follow the instructions below to update Houdini:

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    Tal Memorial 2011

    The Tal Memorial takes place in Moscow November, 16th - 25th.
    The palyers participating are: Magnus Carlsen, Viswanathan Anand, Levon Aronian, Vladimir Kramnik, Vassily Ivanchuk, Sergey Karjakin, Hikaru Nakamura, Peter Svidler, Boris Gelfand and Ian Nepomniachtchi.

    Games: Round 1 [download PGN], Round 2 [download PGN], Round 3 [download PGN], Round 4 [download PGN], Round 5 [download PGN], Round 6 [download PGN], Round 7 [download PGN], Round 8 [download PGN], Round 9 [download PGN]

    Houdini Opening Book released!

    ChessOK is glad to announce the release of an extra strong Houdini 2 book specially created for using with the Houdini 2.0 engine. Houdini Opening Book provides the latest chess theory that proved itself in millions of advanced chess games and matches of top human players. It includes over 65 million positions.
    The book can be used in Aquarium GUI and in other GUIs (Fritz etc.) via Aquarium Book Adapter, supplied with Aquarium build 490.

    Houdini Opening Book (download) - $29.99 / €20.42
    Houdini Opening Book (DVD) - $29.99 / €20.42

    Read more about Houdini Opening Book
    Update Aquarium to build 490 (required for Houdini Opening Book)

    Read more about using Houdini Opening Book in other interfaces

    Study chess online on Chess King Learn! Time-proven training courses, thousands of examples and exercises.

    Start playing right now in your web browser on Chess King Playing Zone! Teams, tournaments, training, analysis and much more!

    7-man Lomonosov Tablebases provide deeper-than-ever insight into chess endgame.

    Download weekly chess database updates (containing 2000+ games) with latest tournaments and games in PGN and Chess Assistant format.

    More »