Provided by: polyglot_2.0.4+git20210322-1_amd64 bug

NAME

       PolyGlot -  Winboard protocol to UCI protocol adapter
                -  book engine for Polyglot books
                -  a collection of utilities for creating and analyzing opening books
                -  a utility for analyzing epd files
                -  a perft counter

SYNOPSIS

       polyglot [configfile] [-noini] [-ec engine] [-ed enginedirectory] [-en enginename] [-log
       true/false] [-lf logfile] [-pg <name>=<value>]* [-uci <name>=<value>]*

       polyglot make-book [-pgn inputfile] [-bin outputfile] [-max-ply ply] [-min-game games]
       [-min-score score] [-only-white] [-only-black] [-uniform]

       polyglot merge-book -in1 inputfile1 -in2 inputfile2 [-out outputfile]

       polyglot info-book [-bin inputfile] [-exact]

       polyglot dump-book [-bin inputfile] -color color [-out outputfile]

       polyglot [configfile] epd-test [engineoptions] [-epd inputfile] [-min-depth depth]
       [-max-depth depth] [-max-time time] [-depth-delta delta]

       polyglot perft [-fen fen] [-max-depth depth]

DESCRIPTION

   PolyGlot as adapter and book engine
       PolyGlot is a "UCI adapter".  It connects a GUI interface (such as XBoard, Winboard, Arena
       or Chessbase) to a UCI chess engine.

       By specifying an opening book (in PolyGlot book format) chess engines can transparently
       use such books.

       PolyGlot understands the two main GUI protocols: UCI and xboard. Normally the protocol
       will be auto detected but this can be overridden in the configuration file.

       In xboard mode PolyGlot fully translates between the xboard and UCI protocols.  In
       addition it tries to solve known problems with other adapters.  For instance, it detects
       and reports draws by fifty-move rule, repetition, etc ... It also supports Chess960.

       When in UCI mode PolyGlot mostly passes commands from the GUI to the engine and vice
       versa, except that it will play book moves on behalf of the engine when the occasion
       arises.

       The engine options are exported as UCI options in UCI mode and as "feature option="
       commands in xboard mode. The latter form an extension of the xboard protocol as defined by
       H.G. Muller.

       Options which normally appear in the [PolyGlot] section of the config file (see below) are
       exported as options with their name prefixed by "Polyglot". This makes it easy to filter
       them in the GUI.

       NOTE: Not all options are exported, only those that make sense in the given mode.

   Book making utilities
       PolyGlot supports the "PolyGlot opening book format". This is the defacto standard non-
       proprietary opening book format. It is fully documented here

       http://hgm.nubati.net/book_format.html

       Roughly speaking a PolyGlot opening book is a collection of triples (position, move,
       weight). A "position" is represented by a 64-bit Zobrist hash key. The weight is
       proportional to the probability the move should be played.

       Other opening book formats such as ChessBase's .ctg format and Arena's .abk format are
       undocumented and proprietary. They can only be used 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.

       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.

   Epd test mode
       In epd test mode, PolyGlot will search positions in an epd file and record the number of
       times the right best move was found.  The arguments specify when to stop the search in any
       given position.

   Perft counts
       A perft count is the number of legal move sequence in a given position up to a given
       depth. PolyGlot can perform such perft counts. It is however much slower than other more
       dedicated programs.

OPTIONS

       When PolyGlot is invoked as an adapter of in epd-test mode it gets its options from a
       config file and then from the command line.  The default config file is "polyglot.ini" but
       an alternative one may be optionally included as first argument. The config file format is
       described below.

       The following engine options may be specified on the command line.

       -noini
           Do not use a config file, even if one was specified on the command line.

       -pg The argument is a string of the form <name>=<value>. This option will set the Polyglot
           option <name> to <value>.

       -uci
           The argument is a string of the form <name>=<value>. This option will set the engine
           option <name> to <value>.

       -ec This is an alias for -pg "EngineCommand=<value>"

       -ed This is an alias for -pg "EngineDir=<value>"

       -en This is an alias for -pg "EngineName=<value>"

       -log (default: false)
           This is an alias for -pg "Log=<value>"

       -lf (default: "polyglot.log")
           This is an alias for -pg "LogFile=<value>".

       -wb (default: "true")
           This is an alias for -pg "OnlyWbOptions=<value>".

       When invoked as

   polyglot make-book
       PolyGlot supports the following options

       -pgn (default: "book.pgn")
           Input file in pgn format.

       -bin (default: "book.bin")
           Output file in PolyGlot format.

       -max-ply (default: 1024)
           Specifies the maximum ply-depth of lines included in the book.

       -min-game (default: 3)
           Specifies the minimum number of games that have to contain this move for it to be
           included in the book.

       -min-score (default: 0.0)
           Specifies the minimum score (or weight) this move should have received for it to  be
           included in the book. The score is 2*(wins)+(draws), globally scaled to fit into 16
           bits.

       -only-white
           Include only moves for white in the book.

       -only-black
           Include only moves for black in the book.

       -uniform
           Set all weights to 1. In other words, all moves will be selected with equal
           probability.

       When invoked as

   polyglot merge-book
       PolyGlot supports the following options

       -in1
           First input file (in PolyGlot book format).

       -in2
           Second input file (in PolyGlot book format).

       -out (default: out.bin)
           Output file (in PolyGlot book format).

       When a position occurs in both input books, its moves will be combined.  If a move from
       that position occurs in both books, a single entry for that move will appear in the output
       book, with a weight that is the sum of the weights from the input books.  The learn field
       will be copied from the first book, though.

       When invoked as

   polyglot dump-book
       PolyGlot supports the following options

       -bin (default: book.bin)
           Input file in PolyGlot book format.

       -color
           The color for whom to generate the lines.

       -out (default: book_<color>.txt)
           The name of the output file.

       When invoked as

   polyglot info-book
       PolyGlot supports the following options

       -bin (default: book.bin)
           Input file in PolyGlot book format.

       -exact
           Attempt to count the provably unreachable positions among the isolated ones.  Note
           that this takes a very long time.

       When invoked as

   polyglot epd-test
       (possibly with a config file as first argument) PolyGlot supports besides the generic
       options described above the following additional options.

       -max-depth (default: 63)
           Unconditionally stop the search when this depth has been reached.

       -max-time (default: 5.0)
           Unconditionally stop the seach after this amount of time.

       -depth-delta (default: 3)
           Stop the search if the solution as been found and the best move has been constant for
           this many depths, on condition that the mininal depth and minimal time have been
           reached.

       -min-depth (default: 8)
           Minimal search depth when the search is stopped using "-depth-delta".

       -min-time (default: 1.0)
           Minimal search time when the search is stopped using "-depth-delta".

       When invoked as

   polyglot perft
       PolyGlot supports the following options

       -fen (default: starting position)
           Fen at which to start searching.

       -max-depth (default: 1)
           Maximum depth to search.

CONFIG FILE FORMAT

       There should be a different config file for each engine.

       The config file is in the traditional INI format.

           [PolyGLot]
           option = value
           ...
           [Engine]
           option = value
           ...

       The characters "#" and ";" serve as comment characters.

       Initial and final white space is stripped from option names and values. If you need to use
       characters which have a special meaning to PolyGlot (these are ';#[]=\') you should quote
       them by preceding them with '\'. "Quoting" other characters in this way has no effect. In
       particular the use of '\' as a path separator in windows should normally not affected.

   [PolyGlot] section
       This section is used by PolyGlot only.  The engine is unaware of these options.  The list
       of available options is detailed below.

       EngineName (default: UCI name)
           This is the name that will appear in the GUI.  It is cosmetic only.  You can use
           different names for tweaked versions of the same engine.

       EngineDir (default: ".")
           Full path of the directory where the engine is installed.  You can use "." (without
           the quotes) if you know that PolyGlot will be launched in the engine directory or the
           engine is in the "path" and does not need any data file.

       EngineCommand
           Put here the name of the engine executable file.  You can also add command-line
           arguments.  Path searching is used and the current directory will be "EngineDir". On
           Linux the EngineCommand is passed to wordexp so that shell quoting rules and
           expansions are applied.  On Windows the EngineCommand is simply passed to
           CreateProcess which does its own shell like processing.

       Save
       SettingsFile (default: polyglot.ini)
           The SettingsFile option redefines the name of Polyglot's config file, so future use of
           the interactive "Polyglot Save" option can save interactively (i.e. through the GUI
           interface) changed settings to another file as from which the settings were originally
           read.

       SettingsDir (default: $HOME/.polyglot on Linux; ".\_PG" on Windows)
           The directory where ini files are stored for engines that are started with -noini.
           Such ini files may be created by pushing the "Polyglot Save" button in the Engine
           settings dialog in WB/XB 4.4.0 and higher. As a special exception (for WB/XB 4.4.0
           compatibility) this directory is also used in case PolyGlot is started with config
           files named "polyglot_1st.ini" or "polyglot_2nd.ini".

       Log (default: false)
           Whether PolyGlot should log all transactions with the interface and the engine.  This
           should be necessary only to locate problems.

       LogFile (default: polyglot.log)
           The name of the log file.  Note that it is put where PolyGlot was launched from, not
           into the engine directory.

           WARNING: Log files are not cleared between sessions, and can become very large.  It is
           safe to remove them though.

       Resign (default: false)
           Set this to "true" if you want PolyGlot to resign on behalf of the engine.

           NOTE: Some engines display buggy scores from time to time although the best move is
           correct.  Use this option only if you know what you are doing (e.g. you always check
           the final position of games).

       ResignMoves (default: 3)
           Number of consecutive moves with "resign" score (see below) before PolyGlot resigns
           for the engine.  Positions with only one legal move are ignored.

       ResignScore (default: 600)
           This is the score in centipawns that will trigger resign "counting".

       QueenNeverResigns (default: true)
           Suppresses resigning irrespective of the score, as long as the engine still has a
           Queen (hoping for a perpetual).

       Handledraws (default: false)
           When set Polyglot can accept draw offers on behalf of the engine, when the last
           reported engine score is below Polyglot's contempt.

       ContemptScore (default: 30)
           This is the score in centipawns that the engine must minimally see in its own
           disadvantage before Polyglot will accept a draw offer.

       ShowPonder (default: true)
           Show search information during engine pondering.  Turning this off might be better for
           interactive use in some interfaces.

       ShowTbHits (default: false)
           Reports extra info on selective depth, search speed (knps) and tablebase hits at the
           beginning of the PV field in the thinking output of WinBoard protocol, just before the
           real PV.

       ScoreWhite (default: true)
           Report score from white's point of view in xboard mode. (Wrecks XBoard...).

       KibitzMove (default: false)
           Whether to kibitz when playing a move.

       KibitzPV (default: false)
           Whether to kibitz when the PV is changed (new iteration or new best move).

       KibitzCommand (default: "tellall")
           xboard command to use for kibitzing, normally "tellall" for kibitzing or "tellothers"
           for whispering.

       KibitzDelay (default: 5)
           How many seconds to wait before starting kibitzing.  This has an effect only if
           "KibitzPV" is selected, move kibitzes are always sent regardless of the delay.

       KibitzInterval (default: 0)
           This is another form of throttling. PolyGlot will usually wait this many seconds
           before doing the next kibitz.

       UCI (default: false)
           If true PolyGlot will not understand xboard commands.

       MateScore (default: 0)
           Mate score reported to GUI when in xboard mode.  When set to 0 it uses the new CECP
           convention of reporting 100000 + N for mate in N moves, and -(100000 + N) for mated in
           N.

       Book (default: false)
           Indicates whether a PolyGlot book should be used.  This has no effect on the engine
           own book (which can be controlled with the UCI option "OwnBook" in the [Engine]
           section).  In particular, it is possible to use both a PolyGlot book and an engine
           book.  In that case, the engine book will be used whenever PolyGlot is out of book.
           Remember that PolyGlot is unaware of whether the engine is itself using a book or not.

       BookFile (default: book.bin)
           The name of the (binary) book file.  Note that PolyGlot will look for it in the
           directory it was launched from, not in the engine directory.  Of course, full path can
           be used in which case the current directory does not matter.

       BookRandom (default: true)
           Select moves according to their weights in the book. If false the move with the
           highest weight is selected.

       BookLearn (default: false)
           Switches on updating of the 'learn fields' of the opening book, which for each move
           record the number of times the move was played, and the number of half-points scored
           with it.  It also switches on making use of this information already in the book, for
           altering the move-selection probabilities from those specified by the book weights.
           (Rarely played moves will be favored, moves with a significant poor performance will
           be shunned.)  This option must be set before the book is specified, or the updating of
           the learn info will not work!

       BookDepth (default: 256)
           Stop using the book after this number of moves.

       BookTreshold (default: 5)
           Do not play moves with a weight (probability) lower than this (in per mil).

       UseNice (default: false)
           Run the engine at nice level 5, or "NiceValue" if it set.  On some operating systems
           it may be necessary to run the engine at lower priority for it to be responsive to
           commands from PolyGlot while searching.

       NiceValue (default: 5)
           Nice levels go from -20 to 20 with 20 being the lowest priority.  On Unix only root
           can set negative nice levels. On Windows the standard Win32 priority levels are mapped
           in a sensible way to Unix nice levels.

       Affinity (default: -1)
           This a bit vector in which each bit represents the processors that a process is
           allowed to run on. This option works only on Windows.

       STFudge (default: 20)
           PolyGlot will translate "st x" as "go movetime 1000*x-STFudge".  The rationale is that
           in the UCI specification the argument of movetime is defined as the exact search time
           whereas the argument of the st command is only an upperbound.

       OnlyWbOptions (default: true)
           If true then PolyGlot restricts the options it sends to those that are potentially
           useful for WinBoard.

   Work arounds
       Work arounds are identical to options except that they should be used only when necessary.
       Their purpose is to try to hide problems with various software (not just engines).

       IMPORTANT: Any of these work arounds might be removed in future versions of PolyGlot.  You
       are strongly recommended to contact the author of faulty software and truly fix the
       problem.

       PolyGlot supports the following work arounds:

       UCIVersion (default: 2)
           The default value of 2 corresponds to UCI+.  Use 1 to select plain UCI for engines
           that have problems with UCI+.

       CanPonder (default: false)
           PolyGlot now conforms to the documented UCI behaviour: the engine will be allowed to
           ponder only if it (the engine) declares the "Ponder" UCI option.  However some engines
           which can actually ponder do not declare the option.  This work around lets PolyGlot
           know that they can ponder.

       SyncStop (default: false)
           When a ponder miss occurs, Polyglot interrupts the engine and IMMEDIATELY launches a
           new search.  While there should be no problem with this, some engines seem confused
           and corrupt their search board.  "SyncStop" forces PolyGlot to wait for the (now
           useless) ponder search to finish before launching the new search.

       PromoteWorkAround (default: false)
           Some engines do not specify a promotion piece, e.g. they send "e7e8" instead of the
           correct "e7e8q".  This work around enables the incorrect form (and of course promotes
           into a queen).

       RepeatPV (default: true)
           When true, PolyGlot repeats the last pv string (which also contains score,depth and
           time usage) it got from the engine. Some engines however do not send a new pv string
           just before sending the move.  In that case the output of PolyGlot would be
           inconsistent.  When RepeatPV is false PolyGlot does not repeat the last pv string.
           Due to the way kibitzing is implemented, KibitzMove is disabled in that case.

   [Engine] section
       This section contains engine UCI options.  PolyGlot does not understand them, but sends
       the information to the engine at startup (converted to UCI form).  You can add any UCI
       option that makes sense to the engine (not just the common options about hash-table size
       and tablebases).

       NOTE: use INI syntax, not UCI.  For example "OwnBook = true" is correct.  It will be
       replaced by PolyGlot with "setoption name OwnBook value true" at engine startup.

       Standard UCI options are

           Hash
           NalimovPath
           NalimovCache
           GaviotaPath
           GaviotaCache
           SyzygyPath
           OwnBook

       Hidden options like "Ponder" or "UCI_xxx" are automatic and should not be put in an INI
       file.

       The other options are engine-specific.  Check their name using a UCI GUI or launch the
       engine in a console and type "uci".

EXAMPLES

       Running the UCI engine "fruit" under xboard 4.3.15 and later (this invokes PolyGlot
       internally).

           xboard -fcp fruit -fUCI

       An explicit command line for using the UCI engine "fruit" with logging enabled (this works
       also with older versions of xboard).

           xboard -fcp "polyglot -noini -log true -ec fruit"

       The equivalent config file would be:

           [PolyGlot]
           EngineCommand = fruit
           Log = true
           [Engine]

       Compile "games.pgn" into a book "book.bin" retaining all lines of at most 30 plies.

           polyglot make-book -pgn games.pgn -bin book.bin -max-ply 30

       Merge books "w1.bin" and "w2.bin" into a book "w.bin".

           polyglot merge-book -in1 w1.bin -in2 w2.bin -out w.bin

       Inspect lines for white in "w.bin"

           polyglot dump-book -bin w.bin -color white -out w_white.txt

       Test epd file "test.epd" with a (maximum) search time of 7 minutes per position

           polyglot epd-test -epd test.epd -max-time 420

EXIT STATUS

       PolyGlot always returns 0 on exit.

AUTHORS

       Main author: Fabien Letouzey<fabien_letouzey(at)hotmail.com>

       Native Windows port:  Huang Chen<webmaster@elephantbase.net> ("Morning Yellow")

       Various enhancements: Fonzy Bleumers<match(at)geenvis.net>

       UCI port and implementation of new WB protocol: Michel Van den Bergh
       <michel.vandenbergh(at)uhasselt.be>

SEE ALSO

       xboard(6)

                                            2021-03-21                                POLYGLOT(6)