Using custom opening books

[DJ Dekker]

Picochess comes with ten opening books, which is great. It is also easy to replace them with your own books if you would like to.

I've compiled five new Polyglot opening books based on Chessbase and the instructions in Steve Maughan's video. Each of these five opening books deals with one volume of the Encyclopaedia of Chess Openings (ECO). Nothing fancy, no tuning for best performance, just some simple opening books containing main lines with some variations.

After creating the .bin books I replaced a-fun.bin, b-anand.bin, c-korchnoi.bin, d-larsen.bin and e-pro.bin by:

a-flank.bin (A00-A99)

b-semiopen.bin (B00-B99)

c-open.bin (C00-C99)

d-closed.bin (D00-D99)

e-indian.bin (E00-E99)

This could be an easy way to train specific kinds of openings while still keeping the more universal opening books like gm1950 or the Stockfish book.

[Shivkumar Shivaji]

Can you do me a favor and do a git pull of the opening books or send them to me via email?

We can make these part of the official picochess tree! Opening practice is a good idea.

Thanks, Shiv

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[DJ Dekker]

Hi Shiv,

Sure! You can download them in a zip file from my Dropbox:

https://dl.dropboxusercontent.com/u/10122745/20150502_Opening_Books.zip

Greetings,

DJ

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[Stefano]

Great job DJ!
How can we try these books before they will be integrated in picochess?
Is it enough to copy them replacing some others in their relevant folder or all the program has to be re-compiled to generate a new executable image?
Thanks
Stefano

[DJ Dekker]

Hi Stefano,

Yes, it's enough to copy them into the opening books folder. You don't need a new image file.

First type the following at the command line:

cd /opt/picochess/books

Now you download the opening books that you'd like to have (there are five of them). For example, to download a-flank.bin you would type:

sudo wget https://dl.dropboxusercontent.com/u/10122745/a-flank.bin

To download the other four files simply change a-flank into b-semiopen, c-open, d-closed or e-indian (press arrow-up and change the appropriate part of the command).

Now make sure that you have no two files in the /opt/picochess/books directory starting with the same letter. You can find out by listing the contents of the directory:

ls -al

You will see that the original books (a-fun.bin, b-anand.bin etc.) are still there. If you would like to keep them, create a folder to move them into:

sudo mkdir ../backupbooks

And move the appropriate opening books into this new folder:

sudo mv a-fun.bin b-anand.bin c-korchnoi.bin d-larsen.bin e-pro.bin ../backupbooks

If you don't want to keep them, you can simply remove them.

If you installed all five new books, the mapping for the extra black queen in starting position has now become as follows:

A3 - no book

B3 - Flank Openings

C3 - Semi-open Games (except French Defense)

D3 - Open Games (including French Defense)

E3 - Closed and Semi-closed Games (including Grünfeld)

F3 - Indian Games (except Grünfeld)

G3 - GM2001

H3 - Varied

H4 - GM1950

G4 - Performance

F4 - Stockfish 2.11

Op zondag 3 mei 2015 11:26:17 UTC+2 schreef Stefano:

[Stefano]

Very clear DJ !
Dank u wel.
Dui
Stefano

[Mete Yücel]

Hello Decker,
Will this new opening book will come with the next update?

[D.J. Dekker]

Hi Mete,

I don't know. It's up to the developers what to add to the next versions and when to release them. Besides that, it may take some time to test the new books.

-------- Oorspronkelijk bericht --------
Van: Mete Yücel <yuece...@googlemail.com>
Datum:03-05-2015 18:43 (GMT+01:00)
Aan: pico...@googlegroups.com
Cc:
Onderwerp: Re: Using custom opening books

Hello Decker,
Will this new opening book will come with the next update?

[Shivkumar Shivaji]

Hi DJ,

Can you make a pull request with the new opening books. Others like your book selection too as it is ECO based. I will merge it right in when you submit.

Thanks!, Shiv

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