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Free download of ChessOK Aquarium 2021 with 3-month subscription to Chess King LEARN

ChessOK Aquarium 2021: A Powerful Chess Software for Analysis and Playing

If you are looking for a chess software that can help you improve your chess skills, analyze your games, play against strong opponents, and create your own chess content, then you might want to check out ChessOK Aquarium 2021. ChessOK Aquarium 2021 is a revolutionary chess software that offers advanced analysis functions, database management, playing features, and publishing options. It is compatible with the world's strongest chess engine, Houdini 3, and also includes a one-year access to the 7-piece Lomonosov endgame tablebase and a three-month subscription to Chess King Learn courses. In this article, we will review the features and benefits of ChessOK Aquarium 2021, show you how to download it for free, and give you some tips on how to use it effectively.

chessok aquarium 2021 free download

What is ChessOK Aquarium 2021?

ChessOK Aquarium 2021 is a chess software developed by Convekta Ltd, a company that has been producing chess programs since 1991. Some of their famous products include Chess Assistant, CT-ART, and Peshka. ChessOK Aquarium 2021 is the latest version of their flagship product, ChessOK Aquarium, which was first released in 2008. ChessOK Aquarium 2021 is designed to be a comprehensive tool for chess players and analysts of all levels. It combines an easy-to-navigate interface with powerful features that allow you to:

  • Analyze chess positions and games with the help of various engines, including Houdini 3, Stockfish 12, Komodo, and others.

  • Manage your chess database and game collection with over 7.5 million games updated weekly.

  • Play against the computer or online with different skill levels and handicaps.

  • Publish your chess games, analysis, books, or articles in various formats, including iBook, web/blog, or print.

Features and benefits of ChessOK Aquarium 2021

ChessOK Aquarium 2021 has many features and benefits that make it stand out from other chess software. Here are some of them:

Interactive Deep Analysis (IDeA)

IDeA is one of the most advanced methods available for analyzing chess positions. It is based on the concept of building an analysis tree that covers all the relevant variations and evaluations. IDeA behaves like a strong chess player who examines different candidate moves and branches out to explore them further. You can also interact with IDeA by adding your own moves or comments, or by directing it to focus on certain lines or positions. IDeA can also use multiple engines simultaneously to speed up the analysis process. With IDeA, you can discover new ideas and insights that would otherwise be missed by conventional analysis methods.

Infinite Analysis Trees

Another unique feature of ChessOK Aquarium 2021 is that it stores your infinite analysis results in a tree format. This means that whenever you encounter the same position in any database or game, you can see that you have analyzed it before and what the evaluation was. You can also insert the variation and evaluation into the current game or add it to a tree configuration. This way, you can always see the best moves and their scores in any position. You can also store separate analysis trees for different engines, so you can compare their opinions and preferences.

Database and game collectionDatabase and game collection

ChessOK Aquarium 2021 comes with a huge database of over 7.5 million games, updated weekly with the latest tournaments and matches. You can also import your own games or download additional databases from the internet. You can search, sort, filter, and edit the games in the database, as well as add your own comments or annotations. You can also create your own game collections based on various criteria, such as players, openings, themes, or positions. You can use these collections to study specific aspects of chess or to prepare for your opponents.

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Playing against the computer or online

ChessOK Aquarium 2021 allows you to play against the computer or online with different options and settings. You can choose the engine, the skill level, the time control, the opening book, and the handicap for the computer. You can also adjust the style and personality of the computer, such as aggressive, defensive, or random. You can also play online against other human players on various chess servers, such as ChessOK Playing Zone, FICS, ICC, or Playchess. You can also participate in tournaments, leagues, or team matches online.

Publishing and sharing your chess content

ChessOK Aquarium 2021 enables you to publish and share your chess content in various formats and platforms. You can create your own chess books or articles using the built-in editor, which supports text formatting, diagrams, variations, comments, and multimedia. You can also export your chess content to HTML, PDF, EPUB, PGN, CBH, or RTF formats. You can also publish your chess content online using the iBook feature, which allows you to create interactive web pages or blogs with your chess games and analysis. You can also share your chess content via email or social media.

How to download ChessOK Aquarium 2021 for free?

If you are interested in trying out ChessOK Aquarium 2021 for free, you can download it from the official website of ChessOK. The download file is about 2 GB in size and contains the program files, the Houdini 3 engine, the database of 7.5 million games, and a one-year access to the 7-piece Lomonosov endgame tablebase. The download file also includes a three-month subscription to Chess King Learn courses, which are interactive online lessons that cover various topics and levels of chess. To download ChessOK Aquarium 2021 for free, you need to follow these steps:

  • Go to the ChessOK website and click on the "Download" button.

  • Fill in your name and email address and click on "Submit".

  • Check your email inbox for a confirmation message from ChessOK.

  • Click on the link in the email message to start downloading ChessOK Aquarium 2021.

  • Save the file to your computer and wait for it to finish downloading.

How to install and activate ChessOK Aquarium 2021?

After you have downloaded ChessOK Aquarium 2021 for free, you need to install it on your computer and activate it with a serial number. To install and activate ChessOK Aquarium 2021, you need to follow these steps:

  • Open the downloaded file and run the setup wizard.

  • Follow the instructions on the screen and choose a destination folder for the program files.

  • Wait for the installation process to complete.

  • Launch ChessOK Aquarium 2021 from your desktop or start menu.

  • Enter your name and email address and click on "Activate".

  • Check your email inbox for a message from ChessOK with your serial number.

  • Copy and paste the serial number into the activation window and click on "OK".

  • Enjoy using ChessOK Aquarium 2021!

How to use ChessOK Aquarium 2021?

Now that you have installed and activated ChessOK Aquarium 2021, you are ready to use it for your chess needs. Here are some tips on how to use ChessOK Aquarium 2021 effectively:

Opening the program and choosing a mode

When you open ChessOK Aquarium 2021, you will see a main window with several tabs at the top. These tabs represent different modes of operation that you can choose from depending on what you want to do. The modes are:

  • Analyze: This mode allows you to analyze any position or game with various engines and methods.

Play: This the official website of ChessOK. You can also install and activate it with a serial number that you will receive by email. You can also use it effectively by choosing the appropriate mode and following the tips that we have provided in this article. ChessOK Aquarium 2021 is a chess software that you will not regret using. It will enhance your chess experience and help you achieve your chess goals.


Here are some frequently asked questions about ChessOK Aquarium 2021:

  • What are the system requirements for ChessOK Aquarium 2021?

ChessOK Aquarium 2021 req


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