In BIN format use command :
You can compile a PGN file into a binary book using PolyGlot on the
command line. At the moment, only a main (random) book is provided.
It is not yet possible to control opening lines manually. I am
working on it though.
Usage: "polyglot make-book <options>".
"make-book" options are:
Name of the input PGN file. PolyGlot should support any
standard-conforming file. Let me know if you encounter a problem.
Name of the output binary file. I suggest ".bin" as the extension but
in fact PolyGlot does not care.
- "-max-ply" (default: infinite)
How many plies (half moves) to read for each game. E.g. if set to
"20", only the first 10 full moves of each game will be scanned.
- "-min-game" (default: 3)
How many times must a move be played to be kept in the book. In other
words, moves that were played too rarely will be left out. If you
scan full games "2" seems a minimum, but if you selected lines
manually "1" will make sense.
- "-only-white" *** NEW ***
Save only white moves. This allows to use different parameters for
white and black books, and merge them into a single file with the
"merge-book" command, see below.
- "-only-black" *** NEW ***
Same for black moves.
- "-uniform" *** NEW ***
By default, a probability is calculated by PolyGlot for each move
depending on how popular it is (how often it was playing in the
provided PGN file) and how much it "scored". This option bypasses the
default mechanism and affects equal probability to all moves. This
allows more variety of play.
This option is normally used only with hand-selected lines (e.g. "user
Example: "polyglot make-book -pgn games.pgn -bin book.bin -max-ply 30".
Building a book is usually very fast (a few minutes at most). Note
however that a lot of memory may be required. To reduce memory usage,
select a ply limit.
Imagine that we've got 4 PGN files as follows:
w1.pgn: fixed white lines, all moves manually checked
w2.pgn: selected games (for random book as with PolyGlot 1.3)
b1.pgn and b2.pgn: same for black
The first step is to build 4 .bin files with appropriate options.
Lines starting with "> " indicate what is typed on the command line.
> polyglot make-book -min-game 1 -uniform -only-white -pgn w1.pgn -bin w1.bin
I added "-uniform" because it allows randomness in the fixed lines
(e.g. d4+e4 at 50%). It has no effect if lines are deterministic
(only one move for a given position).
"-min-game 1" is characteristic for user books. All moves are supposed
to be safe so there is no reason to filter them with other heuristics.
> polyglot make-book -min-score 50 -only-white -pgn w2.pgn -bin w2.bin
This shows how min-score can actually be different for white and black
(as with multiple books). I don't use "max-ply" because "min-game"
default value of 3 will limit depth somewhat. You are of course free
to use it.
Same for black:
> polyglot make-book -min-game 1 -uniform -only-black -pgn b1.pgn -bin b1.bin
> polyglot make-book -min-score 40 -only-black -pgn b2.pgn -bin b2.bin
At this point we have 4 .bin files. Notice that different parameters
were used for white and for black (not to mention that different PGN
files can be used).
Let's now merge the white books.
> polyglot merge-book -in1 w1.bin -in2 w2.bin -out w.bin
Input files are not symmetrical, "in1" has priority over "in2".
"skipped xxx entries." message from PolyGlot means there were some
position conflicts. This is normal since we want to overwrite some
random moves with fixed lines instead.
Same for black:
> polyglot merge-book -in1 b1.bin -in2 b2.bin -out b.bin
Now we can finally merge the white and black books.
> polyglot merge-book -in1 w.bin -in2 b.bin -out book.bin
It's important to check that there are no conflicts, otherwise
something went wrong.
Note that this last operation was only made possible thanks to colour
filtering, otherwise nearly all positions would lead to conflicts.
For this reason, it does not make much sense to mix old .bin files
(which contain moves for both colours).
All these command lines might seem numerous and complicated but they
can be put together into batch files.
>> Thank you.
>>And waht gui support bin books?
Bin Book. Polyglot format is universal, You can use it directly in Engine Configurations In any GUI.
>>I know that ctg is supported by chessbase. How to make ctg books?
Please read first this manual, it explain You a lot !
Author: © Nick Carlin, 2009, 2011.
Enjoy the reading :-)
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