X-Git-Url: http://winboard.nl/cgi-bin?p=polyglot.git;a=blobdiff_plain;f=polyglot.pod;h=0024cd105e2e5740c7164ef2a1ba8e8b45f8dbf0;hp=db61280462e7b01813f8630ddd37a87020d6a7d3;hb=ad2265d4fc54fc9ba99fc606e6174df34bfb4a0f;hpb=6442b61046f46f65bfc4bf0b3727abe2dc27acb8

diff --git a/polyglot.pod b/polyglot.pod
index db61280..0024cd1 100644
--- a/polyglot.pod
+++ b/polyglot.pod
@@ -2,7 +2,7 @@
 
 PolyGlot -  Winboard protocol to UCI protocol adapter
          -  book engine for Polyglot books 
-         -  a collection of utilities for creating opening books
+         -  a collection of utilities for creating and analyzing opening books
          -  a utility for analyzing epd files
          -  a perft counter
 
@@ -16,6 +16,10 @@ polyglot make-book [-pgn inputfile] [-bin outputfile] [-max-ply ply] [-min-game
 
 polyglot merge-book -in1 inputfile1 -in2 inputfile2 [-out outputfile]
 
+polyglot info-book [-bin inputfile] [-exact]
+
+polyglot dumb-book [-bin inputfile] -color color [-out outputfile]
+
 polyglot [configfile] epd-test [-epd inputfile] [-min-depth depth] [-max-depth depth] [-max-time time] [-depth-delta delta] 
 
 polyglot perft [-fen fen] [-max-depth depth]
@@ -72,7 +76,33 @@ Other opening book formats such as ChessBase's .ctg format and Arena's
 by their own GUIs. 
 
 PolyGlot can compile a pgn file into a binary PolyGlot book and furthermore
-it can merge two such binary books into a third one. 
+it can merge two such binary books into a third one.
+
+PolyGlot can also extract some useful information from PolyGlot books. The utility
+"dump-book" dumps the "lines" in a book for a given color. By definition
+a line is a sequence of moves (from the starting position) in which
+the given color makes only book moves and the other color makes 
+arbitrary moves (i.e. not necessarily book moves).
+
+Since a PolyGlot book is built up from positions and not lines there
+may be (and there usually are) many positions in the book that are not
+on a "line" as defined in the previous paragraph. It is convenient
+to call such positions "isolated" positions. The utility "info-book"
+counts such isolated positions.
+
+Some of the isolated positions are provably unreachable and they
+could in principle be deleted from the book. For example if a book
+contains only the move "e4" in the starting position but also the
+position after "d4 d5" then this last position is provably unreachable
+since it requires white to make a non-book move when a book move is
+available. Such situations arise frequently from the priority rules
+in merging books.
+
+Unfortunately not all isolated positions are provably unreachable and
+it is difficult to identify the latter. If invoked with "-exact" the
+utility info-book will attempt to count the isolated positions which
+require a player to make a non-book move when a book move is available.
+Due to the possibility of transpositions this is not a fool proof method.
 
 =head2 Epd test mode
 
@@ -172,6 +202,49 @@ Input files are not symmetrical, "in1" has priority over "in2". In other
 words when a position occurs both in "in1" and "in2" only the
 moves and weights from "in1" will be retained in "out".
 
+When invoked
+as
+
+=head2 polyglot dump-book
+
+PolyGlot supports the following options
+
+=over 4
+
+=item B<-bin> (default: book.bin)
+
+Input file in PolyGlot book format.
+
+=item B<-color> 
+
+The color for whom to generate the lines.
+
+=item B<-out> (default: book_<color>.txt)
+
+The name of the output file.
+
+=back
+
+When invoked
+as
+
+=head2 polyglot info-book
+
+PolyGlot supports the following options
+
+=over 4
+
+=item B<-bin> (default: book.bin)
+
+Input file in PolyGlot book format.
+
+=item B<-exact> 
+
+Attempt to count the provably unreachable positions among the isolated ones.
+Note that this takes a very long time. 
+
+=back
+
 When invoked as
 
 =head2 polyglot epd-test