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goi opening book version 4 Competition Edition:







Welcome to this new product, the elite of the chess opening books, its strength is unmatched. Built using only the two latest version of asmFish and Stockfish 9 on very powerful high-end servers, Goi 4 managed to beat any other top opponent book, sometimes very badly. In the Benchmarks subsection you will find the games against the ones I'm referring to.

This time, as requested, more benchmarks will be uploaded in the further days against the most commercial and standard opening books. If you want the best you must get Goi 4.

As usual the customers who paid until one month ago will receive the new version for free, so if you are between them you won't need to pay, just wait for your turn. New customers or renewing customers will get one month of free updates in addiction.


You can buy the book in your favourite format below even if you don't have a Paypal account: you will be redirected to the Paypal webframe interface, just use your normal (or virtual, best advice for internet) credit card.

If you are unsure: How to buy on Paypal without creating an account, read the article and you'll know how to do. Delivering time: 1 minute - 8 hours (yes, I have to sleep too).



goi 4 BIN format: Price 14$, size 222 MB



Delivery time: 1 minute - 8 hours, depending whether I am at my computer or not.





---->> Click here for benchmarks (February, 22: NEW BENCHMARK) <<----









goi opening book 3.2 Competition Edition:



This is a minor update of the 3.1 version, but still one of the strongest opening books for machine competitions available on the Internet. If you are searching for the best book to study opening variants and improve your own strength the CTG format could be a good deal.



goi 3.2 BIN format: Price 8$, size 122 MB




goi 3.2 CTG format: Price 8$, size 135 MB




How to install the BIN format on Chessbase softwares:



Tick 'OwnBook' and enter the full path of the file followed by its name plus its extension.
As example: the bin file is in the folder C:\Users\Bob\Documents\ChessBase\Books → you will have to enter the string C:\Users\Bob\Documents\ChessBase\Books\goi3.2.bin

Set the maximum possible of 'BookDepth' (if I recall correctly asmFish has 100, while Brainfish 255).




How to install the CTG format on Chessbase softwares:


Place the goi3.2.ctb, goi3.2.ctg and goi3.2.cto files into the same directory, then start your Chessbase program, such as Fritz and use what listed below on the 'Advanced' settings of the engine:

- Tick the Tournament book box

- Set Minimum games to 1

- Set Variety of play to the minimum (10 by now)

- Set Influence of learn value to the maximum (100 by now)

- Set Learning strength to the maximum (500 by now)


See the picture below:


ctg best settings




Openings and variants included in the book, sorted by the ECO index:


Tartakowers Flank Opening, Basman, Saragossa, Anderssen, Mieses Opening, French Attack, Grob's Attack, King's Indian Attack, Sleipner, Sokolsky Opening, Larsen Opening, Bird Opening, Queen's Fianchetto, Double Bird, King's Fianchetto, Sicilian-Bird, From's Gambit, Indo Bird, Dutch Attack, Leningrad Attack, Stonewall Attack, Grunfeld Indian Attack, Reti Opening, Accepted Reti, Benoni with White, Queen's Indian Attack, Reti-Slav, Unusual 3nd White, Mikenas - System, English, English Four Knights, Symmetrical English, Hedgehog, St. George/Basman, Owens Defence, Nimzowitsch, Scandinavian Defence, Modern Defence, Alekhine's Defence, Alekhine's Defence Chase Variation, Alekhine's Defence Modern Variation, Robatsch Modern Defence, Pirc Defence, Pirc Defence Czech Variation, Pirc Defence Fianchetto Variation, Pirc Defence Classical Variation, Pirc Defence Austrian Attack, Caro-Kann, Caro-Kann Exchange Variation, Caro-Kann Panov Variation, Caro-Kann Main Line, Caro-Kann Larsen-Bronstein, Caro-Kann Nimzowitsch, Caro-Kann Classical Variation, French Defense, French Defense Exchange Variation, French Defense Advance Variation, French Defense Tarrasch Variation, French Defense Classical Variation, French Defense Burn Variation, French Defense Classical Main Line, King's Gambit, King's Knight Games, The Petroff Defence, The Scotch Game, Three Knights Game, Spanish Four Knight Game, Giuoco Pianissimo, Closed Defence, The Classical Polerio Variation, Spanish (Ruy Lopez), Spanish Schliemann Variation, Spanish Classical Variation, Spanish Exchange Variation, Open Spanish, Closed Spanish, Spanish Main Line, Spanish Modern Chigorin Defence, Sicilian, Sicilian Grand Prix Attack, Sicilian Morra Gambit, Sicilian Alapin Variation, The Closed Sicilian, Sicilian Vinken Variation, Sicilian Spassky, Sicilian Classical Variation, Sicilian Rossolimo, Sicilian Accellerated Dragon, Sicilian Maroczy Bind, Sicilian Pelican Sveshnikov, Kan Variation, Taimanov, Dutch Defence, Dutch Defence Staunton Gambit, Dutch Defence Rubinstein, Dutch Defence Leningrad Variation, Moscow Variation, Sozin, Boleslavsky, Richter/Rauzer, The Dragon, Yugoslav Attack, Scheveningen, Keres Attack, Najdorf, Englung Gambit, Polish Defence, Nimzowitsch, French Indian, Tartakower System, Benoni, Blacmar-Diemer Gambit, Trompowsky Attack, Queen's Knight Opening, King's Knight's Openings, Queen's Bishop Openings, Torre System, Colle System, Queen's Gambit, The Slav, Queen's Gambit Accepted, Queen's Gambit Declined, Tarrasch Defence, Ragozin Variation, Semi-Tarrasch, Semi-Slav, Orthodox Variation, Indian Opening, Indian Opening Trompowsky Attack, Dory Opening, Old Indian Knight Game, Indian Knight Game, Queen's Indian Knight Game, King's Indian Knight Game, Torre Attack, London System, Fianchetto Variation, Budapest Gambit, Old Indian, Modern Benoni, Blumenfeld Gambit, Bogo-Indian, Nimzo-Indian, Neo-Saemisch, Kasparov Variation, Three Knights Variation, Spielmann, Saemisch Variation, Leningrad Variation, Alekhime/Euwe/Botvinnik, Zurich Variation, Noa Variation, Pirc Variation, Rubinstein Variation, Taimanov Variation, Huebner Variation, Grunfeld Defence, Russian System Accellerated, Smyslov's System, Full Center Satup, Accellerated Averbakh, The Kramer System, Makagonov System, Panno Variation





Chess engines:



Stockfish 9: Updated February, 18 2018




Switched to the official Stockfish 9 releases. Versions for Windows (32bit, 64bit, modern computers, Haswell CPUs also known as BMI2) and Linux (64bit, modern computers and Haswell CPUs), MacOS and Android (32bit, 64bit).


Stockfish 9


Stockfish GitHub page.



asmFish: Updated February, 13 2018


Finally the maximum size of the .BIN opening books used with this engine has been raised: up to 1 Terabyte!! Based on a work of Mohammed Li, it was continued by Lyudmil Antonov. Includes: armfish, that is asmFish for Android (only 64 bit Androids, unluckily, so the newest ones), asmFish base version for standard CPUs, and the program mateFish. Supported platforms (all 64 bit): Windows, Linux, MacOS, Android.





Lyudmil Antonov's GitHub page.



Brainfish: Updated February, 18 2018


Brainfish is a different story: these executables are compiled from C++ code and they are bigger than asmFish, but its strength is almost at the same level. This means the Stockfish algorythm was enhanced by Mr. Thomas Zipproth, which all my compliments go. Most problably if it would be rewritten in Assembler it could be even stronger than asmFish. The two packages (executables and source) are hosted on the Mr. Zipproth's website. Unluckily there are only Windows executables with different flavours (32bit, x64, x64_bmi2, x64_modern), but Linux users can compile the source of the second package. I suppose it's the same for Mac users.





Source code


Maximize the strength of these free engines purchasing my opening book.







If you want to get the best app for your Android smartphone/tablet you must download Droidfish, by Peter Österlund. This app combines the strength of Stockfish 2017-09-06 with the ease of use of a handling device. You can play against a Grand Master laying down on your couch or sit on your train place. With the Analyze mode you can also check your games and see where you made a mistake.


Download it on Google Play Store


You can also buy my opening book to get extreme performances, as long as installing the 3-4-5 pieces Syzygy tablebases.




Syzygy tablebases for ending games:


Syzygy tablebases are the latest and most reliable resource to enhance the speed and the computing precision of the endgames. In order to use them you must have a recent Chessbase chess program, the Droidfish app for android pr the free Arena GUI.
These databases are subdivided in two parts: the Syzygy for game endings up to 5 pieces, sized circa 1 GB, and the Syzygy for 6 pieces, subdivided in WDL (the main part, size 68.3 GB) and DTZ (checking the 50 moves rule, size 81.9 GB); total 150 GB.
EVERY tablebases, whether is the 3-4-5 pieces or the 6 pieces, must be run on a VERY FAST storage, like an SSD drive or an USB pen. The essential one is the 3-4-5 pieces database, so you can just buy an USB pen if you don't want or can't spend money to buy an expensive device like an SSD drive.
The fundamental part, both for mobiles and PCS is the 3-4-5 archive (direct link below), because of its relative light size it can be hosted on a clouding storage or even a website. Different facts are for the 6 MAN Syzygy (6 MAN = 6 pieces DTZ + WDL), being sized 150 GB you must download it by installing a torrent client (be aware of the unwanted programs they are asking at the installation process). The one I feel to suggest is Bittorrent.


Download: 3-4-5 pieces. <- Direct link



Download: 6 pieces (extract the torrent files from the zip archive then use a torrent software to download the tablebases).


Installation instruction:




Arena free chessboard:




Want to get a FREE chessboard after having downloaded a FREE, powerful chess engine above? Download Arena, it comes also with its own engines (weaker than asmFish, naturally), its own opening book (weaker than mine but good) and its own endings database. It's a marvellous complete tool for anyone wanting to play and study chess without to spend a coin. You can also use asmFish with it, of course. Multiplatform, for Windows and Linux.
In order to get this beautiful software you have to go on their website, link below.

-->>Click here to go to the Arena homepage<<--






This website had a great success especially for two persons (except me, of course), two Masters of chessprogramming and chess affictionados: Mr. Lyudmil Antonov and Mr. Thomas Zipproth; without them this website wouldn't have ever been maybe under the limelight. I want to thank also my father Giuseppe Goi who started me to everything (chess, computers since the Eighties) and my mom for always giving me financial support. I will be eternally grateful to these persons.

And I thank, of course, all the people of ALL the world using this website: United States, Russia, Germany, France, India, Indonesia, Italy, Turkey, Spain, Brazil, Hungary, United Kingdom, Philippines, Poland, Netherlands, Egypt, South Africa, Canada, Serbia, Czech Republic, Ukraine, Greece, Mexico, Romania, Portugal, Sweden, Croatia, Israel, Argentina, Saudi Arabia, Bangladesh, Finland, Slovakia, Peru, Austria, Belarus, Algeria, Iran, Bulgaria, Taiwan, Japan, Belgium, Singapore, Malaysia, China, Denmark, Venezuela, Australia, Switzerland, Pakistan, Macedonia, Kazakhstan, Tunisia, Chile, Hong Kong, Norway, Uzbekistan, Colombia, Slovenia, Dominican Republic, Morocco, Iraq, Qatar, Paraguay, Luxembourg, Estonia, Ghana, Lithuania, El Salvador, Madagascar, Ecuador, Jordan, Albania, South Korea, Cuba, Uruguay, Georgia, Yemen, Somalia, Nicaragua, Lebanon, Vietnam, Armenia, Thailand, Syria, Azerbaijan, United Arab Emirates, New Zealand, French Polynesia, Zambia, Bosnia and Herzegovina, Jamaica, Moldova, Ireland, Palestinian Territory, Sri Lanka, Sudan, Mauritius, Iceland, Kuwait, Ivory Coast, Zimbabwe, Mongolia, Botswana, Bhutan, Nepal, Latvia, Senegal, Honduras, Montenegro, Dominican Republic, Libya, Bahrain, Kenya, Cambodia, Myanmar, Barbados, Malta.


Top selling countries:


United States of America

Thank you





Terima kasih





South Africa




Takk skal du ha


Благодаря ти



Dank je






List of the 10 countries which downloaded more:

1. United States

2. Russia

3. Germany

4. Italy

5. India

6. France

7. Spain

8. Indonesia

9. Turkey

10. Philippines