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Initial import of Glaurung 2.1

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  1. +674 −0 Copying.txt
  2. +328 −0 Readme.txt
  3. +70 −0 polyglot.ini
  4. +674 −0 src/COPYING
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  25. +101 −0 src/lock.h
  26. +95 −0 src/main.cpp
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  29. +148 −0 src/mersenne.cpp
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  59. +391 −0 src/uci.cpp
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  61. +270 −0 src/ucioption.cpp
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674 Copying.txt
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+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+ 13. Use with the GNU Affero General Public License.
+
+ Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
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+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+ 14. Revised Versions of this License.
+
+ The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time. Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+ Each version is given a distinguishing version number. If the
+Program specifies that a certain numbered version of the GNU General
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+version or of any later version published by the Free Software
+Foundation. If the Program does not specify a version number of the
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+by the Free Software Foundation.
+
+ If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
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+to choose that version for the Program.
+
+ Later license versions may give you additional or different
+permissions. However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+ 15. Disclaimer of Warranty.
+
+ THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
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+IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+ 16. Limitation of Liability.
+
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
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+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ <program> Copyright (C) <year> <name of author>
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
328 Readme.txt
@@ -0,0 +1,328 @@
+1. Introduction
+---------------
+
+Glaurung is a free UCI chess engine. It is not a complete chess
+program, but requires some UCI compatible GUI (like XBoard with
+PolyGlot, eboard, Jos�, Arena, Sigma Chess, Shredder, Chess Partner,
+or Fritz) in order to be used comfortably. Read the documentation for
+your GUI of choice for information about how to use Glaurung with your
+GUI.
+
+Glaurung 2 is a completely rewritten version of Glaurung. Apart from
+the parallel search code, almost no code is shared with Glaurung
+1.2.1, the previous stable version. The new program is clearly
+stronger than the old, but has a less attractive style of play,
+because there are still a few major holes in its evaluation function
+(most notably space and development).
+
+This version of Glaurung supports up to 8 CPUs, but has not been
+tested thoroughly with more than 2. The program tries to detect the
+number of CPUs on your computer and set the number of search threads
+accordingly, but please be aware that the detection is not always
+correct. It is therefore recommended to inspect the value of the
+"Threads" UCI parameter, and to make sure it equals the number of CPU
+cores on your computer.
+
+
+2. Files
+--------
+
+This distribution of Glaurung consists of the following files:
+
+ * Readme.txt, the file you are currently reading.
+
+ * Copying.txt, a text file containing the GNU General Public
+ License.
+
+ * src/, a subdirectory containing the full source code, including a
+ Makefile that can be used to compile Glaurung on Unix-like
+ systems. For further information about how to compile Glaurung
+ yourself, read section 4 below.
+
+ * MacOSX/, a subdirectory containing excutables for Apple Macintosh
+ computers running Mac OS X 10.4 (Tiger) and newer. There are two
+ executables, one for OS X 10.4, and one for OS X 10.5. The
+ executable for OS X 10.4 will work in 10.5 as well, but the one
+ for 10.5 is faster.
+
+ * LinuxX86/, a subdirectory containing 32-bit and 64-bit x86 GNU/Linux
+ executables.
+
+ * Windows/, a subdirectory containing 32-bit and 64-bit Windows
+ executables.
+
+ * polyglot.ini, for using Glaurung with Fabien Letouzey's PolyGlot
+ adapter.
+
+
+3. Opening books
+----------------
+
+This version of Glaurung has experimental support for PolyGlot opening
+books. For information about how to create such books, consult the
+PolyGlot documentation. The book file can be selected by setting the
+UCI parameter "Book File".
+
+A book file contributed by Salvo Spitaleri can be found on the
+Glaurung web page.
+
+
+4. Compiling it yourself
+------------------------
+
+On Unix-like systems, it should usually be possible to compile
+Glaurung directly from the source code with the included Makefile.
+The exception is computer with big-endian CPUs, like PowerPC
+Macintoshes. Some of the bitboard routines in the current version of
+Glaurung are endianness-sensitive, and won't work on a big-endian CPU.
+Ensuring that the line with #define USE_32BIT_ATTACKS" near the top
+of bitboard.h is commented out should solve this problem.
+Commenting out the line with "#define USE_32BIT_ATTACKS" near the
+
+There is also a problem with compiling Glaurung on certain 64-bit
+systems, regardless of the endianness. If Glaurung segfaults
+immediately after startup, try to comment out the line with
+"#define USE_FOLDED_BITSCAN" near the beginning of bitboard.h and
+recompile.
+
+Finally, even if Glaurung does work without any changes on your
+computer, it might be possible to improve the performance by changing
+some of the #define directives in bitboard.h. The default settings
+are optimized for 64-bit CPUs. On 32-bit CPUs, it is probably better
+to switch on USE_32BIT_ATTACKS, and to use BITCOUNT_SWAR_32 instead of
+BITCOUNT_SWAR_64. For computers with very little memory (like
+handheld devices), it is possible to conserve memory by defining
+USE_COMPACT_ROOK_ATTACKS.
+
+
+
+5. History
+----------
+
+2007-05-06: Glaurung 2 - epsilon
+--------------------------------
+
+The first public release, and the first version of my new program
+which is able to match the old Glaurung 1.2.1 on a single CPU. Lots
+of features and chess knowledge is still missing.
+
+2007-05-10: Glaurung 2 - epsilon/2
+----------------------------------
+
+This version is very close to 2 - epsilon. The major changes are:
+
+ * A number of compatibility problems which appeared when trying to
+ compile Glaurung 2 - epsilon on various operating systems and CPUs
+ have been solved.
+
+ * Fixed a major bug in the detection of rooks trapped inside a
+ friendly king.
+
+ * Added knowledge about several types of drawn endgames.
+
+ * Fixed a few FRC related bugs. FRC now works, but because of
+ serious holes in the evaluation function the program plays very
+ badly.
+
+ * A slightly more sophisticated king safety evaluation.
+
+2007-06-07: Glaurung 2 - epsilon/3
+----------------------------------
+
+The first public version with support for multiple CPUs. Unless you
+have a dual-core (or better) computer, use Glaurung with a PolyGlot
+book, or runs games with ponder on, you may want to skip this version,
+which is almost certainly no stronger than 2 - epsilon/2 when running
+on a single CPU. The main changes compared to the previous version
+are:
+
+ * Parallel search, with support for 1-4 CPUs. The program currently
+ always allocates a separate pawn hash table and material hash
+ table for four threads, which is a pure waste of RAM if your
+ computer has just a single CPU. This will be fixed in a future
+ version.
+
+ * Fixed a bug in book randomization. When using Polyglot books, the
+ previous version would always select exactly the same move in the
+ same position after a restart of the program. Thanks to Pavel
+ H�se for pointing this out.
+
+ * Fixed a UCI pondering bug: Glaurung no longer instantly prints its
+ best move when the maximum depth is reached during a ponder
+ search, as the previous version did. According to the UCI
+ protocol, it is not allowed to print the best move before the
+ engine has received the "stop" or "quit" command.
+
+ * Additional search information: The new version displays hash
+ saturation and the current line(s) of search.
+
+ * Several minor bug fixes and optimizations in the search and
+ evaluation.
+
+2007-06-08: Glaurung 2 - epsilon/4
+----------------------------------
+
+A bugfix release, with only a single important change:
+
+ * Fixed a very serious pondering bug. As pointed out by Marc
+ Lacrosse, the previous version would lose on time in almost every
+ single game with pondering enabled. The new version handles
+ pondering correctly (or so I hope). When playing with ponder
+ off, the new version is identical to version 2 - epsilon/3.
+
+2007-06-25: Glaurung 2 - epsilon/5
+----------------------------------
+
+Another minor update, including the following improvements and bug
+fixes:
+
+ * As Werner Sch�le discovered, the previous version would sometimes
+ stop thinking and lose on time right before delivering checkmate
+ (which is of course a very unfortunate moment to lose on time).
+ I haven't been able to reproduce Werner's problem on my computer
+ (probably because I run a different OS), but I have fixed the bug
+ which I suspect caused the time losses. I hope the time losses
+ will no longer occur with 2 - epsilon/5.
+
+ * The program is now slightly less resource-hungry on computers
+ with less than 4 CPU cores: The previous version would always
+ allocated separate pawn and material hash tables for four
+ threads, even when running on a single-core CPU. The new version
+ only allocates pawn and material hash tables for the threads
+ which are actually used.
+
+ * A minor reorganization of the memory layout has made the parallel
+ search about 10% more efficient (at least on my computer, but the
+ results are likely to vary considerably on different systems).
+
+ * The Intel Mac OS X binary is much faster than before, thanks to
+ the Intel C++ compiler (previous versions were compiled with
+ GCC).
+
+ * A few other very minor bug fixes and enhancements.
+
+2007-11-21: Glaurung 2.0
+------------------------
+
+The first stable (or so I hope) and feature-complete version of
+Glaurung 2. The following are the main changes compared to the
+previous version:
+
+ * The license has been changed from GPL version 2 to GPL version 3.
+
+ * MultiPV mode.
+
+ * Support for the "searchmoves" option in the UCI "go" command.
+ This means that it is possible to ask Glaurung to exclude some
+ moves from its analysis, or to restrict its analysis to just a
+ handful of moves selected by the user. This feature must also be
+ supported by the GUI under which Glaurung is run. Glaurung's own
+ GUI does currently not support this feature.
+
+ * Chess960 support now works. The program still plays this game
+ very badly, because of lack of opening knowledge.
+
+ * Much more aggressive pruning in the last few plies of the main
+ search.
+
+ * Somewhat better scaling on multi-CPU systems, and support for up
+ to 8 CPUs.
+
+ * Lots of new UCI parameters.
+
+ * Improved time managment, especially in games with pondering on
+ (i.e. when the engine is allowed to think when it's the
+ opponent's turn to move).
+
+ * Some evaluation improvements, and some new basic endgame
+ patterns.
+
+ * The program should no longer crash if the game lasts longer than
+ 1000 plies.
+
+ * Many minor bug fixes and other tiny improvements throughout the
+ code.
+
+ * More generously commented code, and numerous cosmetic changes in
+ coding style.
+
+2007-11-22: Glaurung 2.0.1
+--------------------------
+
+ * Fixed (or so I hope) a bug which would occasionally cause one of
+ the search threads to get stuck forever in its idle loop.
+
+2008-05-14: Glaurung 2.1
+------------------------
+
+This version contains far too many changes to list them all, but most
+of them are minor and cosmetic. The most important and noticable
+changes are a lot of new UCI parameters, and many improvements in the
+evaluation function. The highlights are:
+
+ * Extensive changes in the evaluation function. The addition of
+ king safety is the most important improvement, but there are also
+ numerous little improvements elsewhere in the evaluation. There
+ is still much work left to do in the evaluation function, though.
+ Space and development are still missing, and the tuning is likely
+ to be very poor. Currently, the program is optimized for an
+ entertaining style rather than maximum strength.
+
+ * More accurate forward pruning. The previous version used the
+ null move refutation move to improve the pruning accuracy by
+ means of a very simple trick: It did not allow pruning of any
+ moves with the piece captured by the null move refutation move.
+ In Glaurung 2.1, this has been enhanced: It does not allow
+ pruning of moves which defend the destination square of the null
+ move refutation move, nor of moves which block the ray of the
+ piece in the case that the moving piece in the null move
+ refutation move is a slider.
+
+ * More conservative use of LMR at PV nodes. The previous version
+ searched the first 6 moves with full depth, 2.1 by default
+ searches the first 14 moves with full depth (but there is a new
+ UCI parameter for configuring this). I am not at all sure
+ whether this is an improvement. More thorough testing is
+ required.
+
+ * Feedback from the evaluation to the search. The search passes an
+ object of type 'EvalInfo' to the eval, and the eval fills this
+ struct with various potentially useful information (like the sets
+ of squares attacked by each piece type, the middle game and
+ endgame components of the eval, etc.). At the moment, almost
+ none of this information is actually used by the search. The
+ only exception is that the evaluation function is now used to
+ adjust the futility pruning margin in the quiescence search.
+
+ * Less extensions. This hurts the programs performance a lot in most
+ test suites, but I hope it improves the branching factor in deep
+ searches.
+
+ * A very long list of new UCI parameters, especially for tuning the
+ evaluation.
+
+
+6. Terms of use
+---------------
+
+Glaurung is free, and distributed under the GNU General Public License
+(GPL). Essentially, this means that you are free to do almost exactly
+what you want with the program, including distributing it among your
+friends, making it available for download from your web site, selling
+it (either by itself or as part of some bigger software package), or
+using it as the starting point for a software project of your own.
+
+The only real limitation is that whenever you distribute Glaurung in
+some way, you must always include the full source code, or a pointer
+to where the source code can be found. If you make any changes to the
+source code, these changes must also be made available under the GPL.
+
+For full details, read the copy of the GPL found in the file named
+Copying.txt.
+
+
+7. Feedback
+-----------
+
+The author's e-mail address is tord@glaurungchess.com
+
70 polyglot.ini
@@ -0,0 +1,70 @@
+
+[PolyGlot]
+
+EngineDir = .
+EngineCommand = ./glaurung
+
+Book = false
+BookFile = book.bin
+
+Log = true
+LogFile = glaurung.log
+
+Resign = true
+ResignScore = 600
+
+[Engine]
+
+Hash = 128
+Threads = 1
+OwnBook = false
+Book File = book.bin
+Use Search Log = false
+Mobility (Middle Game) = 100
+Mobility (Endgame) = 100
+Pawn Structure (Middle Game) = 100
+Pawn Structure (Endgame) = 100
+Passed Pawns (Middle Game) = 100
+Passed Pawns (Endgame) = 100
+Aggressiveness = 100
+Cowardice = 100
+King Safety Curve = Quadratic
+Quadratic = Linear
+King Safety Coefficient = 40
+King Safety X Intercept = 0
+King Safety Max Slope = 30
+King Safety Max Value = 500
+Queen Contact Check Bonus = 4
+Rook Contact Check Bonus = 2
+Queen Check Bonus = 2
+Rook Check Bonus = 1
+Bishop Check Bonus = 1
+Knight Check Bonus = 1
+Discovered Check Bonus = 3
+Mate Threat Bonus = 3
+Check Extension (PV nodes) = 2
+Check Extension (non-PV nodes) = 1
+Single Reply Extension (PV nodes) = 2
+Single Reply Extension (non-PV nodes) = 2
+Mate Threat Extension (PV nodes) = 0
+Mate Threat Extension (non-PV nodes) = 0
+Pawn Push to 7th Extension (PV nodes) = 1
+Pawn Push to 7th Extension (non-PV nodes) = 1
+Passed Pawn Extension (PV nodes) = 1
+Passed Pawn Extension (non-PV nodes) = 0
+Pawn Endgame Extension (PV nodes) = 2
+Pawn Endgame Extension (non-PV nodes) = 2
+Full Depth Moves (PV nodes) = 14
+Full Depth Moves (non-PV nodes) = 3
+Threat Depth = 5
+Selective Plies = 7
+Futility Pruning (Main Search) = true
+Futility Pruning (Quiescence Search) = true
+Futility Margin 0 = 50
+Futility Margin 1 = 100
+Futility Margin 2 = 300
+Maximum Razoring Depth = 3
+Razoring Margin = 300
+Randomness = 0
+Minimum Split Depth = 4
+Maximum Number of Threads per Split Point = 5
674 src/COPYING
@@ -0,0 +1,674 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
+ The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+ The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works. By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users. We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors. You can apply it to
+your programs, too.
+
+ When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
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+
+ To protect your rights, we need to prevent others from denying you
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+
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+
+ Developers that use the GNU GPL protect your rights with two steps:
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+
+ The precise terms and conditions for copying, distribution and
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+
+ TERMS AND CONDITIONS
+
+ 0. Definitions.
+
+ "This License" refers to version 3 of the GNU General Public License.
+
+ "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
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+menu, a prominent item in the list meets this criterion.
+
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+
+ The "source code" for a work means the preferred form of the work
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+
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+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
145 src/Makefile
@@ -0,0 +1,145 @@
+# Glaurung, a UCI chess playing engine.
+# Copyright (C) 2004-2007 Tord Romstad
+
+# This file is part of Glaurung.
+#
+# Glaurung is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Glaurung is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+
+###
+### Files
+###
+
+EXE = glaurung
+
+OBJS = bitboard.o color.o pawns.o material.o endgame.o evaluate.o main.o \
+ misc.o move.o movegen.o history.o movepick.o search.o piece.o \
+ position.o square.o direction.o tt.o value.o uci.o ucioption.o \
+ mersenne.o book.o bitbase.o san.o benchmark.o
+
+
+###
+### Rules
+###
+
+all: $(EXE) .depend
+
+clean:
+ $(RM) *.o .depend glaurung
+
+
+###
+### Compiler:
+###
+
+CXX = g++
+# CXX = g++-4.2
+# CXX = icpc
+
+
+###
+### Dependencies
+###
+
+$(EXE): $(OBJS)
+ $(CXX) $(LDFLAGS) -o $@ $(OBJS)
+
+.depend:
+ $(CXX) -MM $(OBJS:.o=.cpp) > $@
+
+include .depend
+
+
+###
+### Compiler and linker switches
+###
+
+# Enable/disable debugging:
+
+CXXFLAGS += -DNDEBUG
+
+
+# Compile with full warnings, and symbol names
+
+CXXFLAGS += -Wall -g
+
+
+# General optimization flags. Note that -O2 might be faster than -O3 on some
+# systems; this requires testing.
+
+CXXFLAGS += -O3 -fno-exceptions -fomit-frame-pointer -fno-rtti -fstrict-aliasing
+
+
+# Compiler optimization flags for the Intel C++ compiler in Mac OS X:
+
+# CXXFLAGS += -mdynamic-no-pic -no-prec-div -ipo -static -xP
+
+
+# Profiler guided optimization with the Intel C++ compiler. To use it, first
+# create the directory ./profdata if it does not already exist, and delete its
+# contents if it does exist. Then compile with -prof_gen, and run the
+# resulting binary for a while (for instance, do ./glaurung bench 128 1, and
+# wait 15 minutes for the benchmark to complete). Then do a 'make clean', and
+# recompile with -prof_use.
+
+# CXXFLAGS += -prof_gen -prof_dir ./profdata
+# CXXFLAGS += -prof_use -prof_dir ./profdata
+
+
+# Profiler guided optimization with GCC. I've never been able to make this
+# work.
+
+# CXXFLAGS += -fprofile-generate
+# LDFLAGS += -fprofile-generate
+# CXXFLAGS += -fprofile-use
+# CXXFLAGS += -fprofile-use
+
+
+# General linker flags
+
+LDFLAGS += -lm -lpthread
+
+
+# Compiler switches for generating binaries for various CPUs in Mac OS X.
+# Note that 'arch ppc' and 'arch ppc64' only works with g++, and not with
+# the intel compiler.
+
+# CXXFLAGS += -arch ppc
+# CXXFLAGS += -arch ppc64
+# CXXFLAGS += -arch i386
+# CXXFLAGS += -arch x86_64
+# LDFLAGS += -arch ppc
+# LDFLAGS += -arch ppc64
+# LDFLAGS += -arch i386
+# LDFLAGS += -arch x86_64
+
+
+# Backwards compatibility with Mac OS X 10.4 when compiling under 10.5 with
+# GCC 4.0. I haven't found a way to make it work with GCC 4.2.
+
+# CXXFLAGS += -isysroot /Developer/SDKs/MacOSX10.4u.sdk
+# CXXFLAGS += -mmacosx-version-min=10.4
+# LDFLAGS += -isysroot /Developer/SDKs/MacOSX10.4u.sdk
+# LDFLAGS += -Wl,-syslibroot /Developer/SDKs/MacOSX10.4u.sdk
+# LDFLAGS += -mmacosx-version-min=10.4
+
+
+# Backwards compatibility with Mac OS X 10.4 when compiling with ICC. Doesn't
+# work yet. :-(
+
+# CXXFLAGS += -DMAC_OS_X_VERSION_MIN_REQUIRED=1040
+# CXXFLAGS += -DMAC_OS_X_VERSION_MAX_ALLOWED=1040
+# CXXFLAGS += -D__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__=1040
+# CXXFLAGS += -F/Developer/SDKs/MacOSX10.4u.sdk/
+# LDFLAGS += -Wl,-syslibroot -Wl,/Developer/SDKs/MacOSX10.4u.sdk
91 src/benchmark.cpp
@@ -0,0 +1,91 @@
+/*
+ Glaurung, a UCI chess playing engine.
+ Copyright (C) 2004-2008 Tord Romstad
+
+ Glaurung is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Glaurung is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+////
+//// Includes
+////
+
+#include "benchmark.h"
+#include "search.h"
+#include "thread.h"
+#include "ucioption.h"
+
+
+////
+//// Variables
+////
+
+const std::string BenchmarkPositions[15] = {
+ "r4rk1/1b2qppp/p1n1p3/1p6/1b1PN3/3BRN2/PP3PPP/R2Q2K1 b - - 7 16",
+ "4r1k1/ppq3pp/3b4/2pP4/2Q1p3/4B1P1/PP5P/R5K1 b - - 0 20",
+ "4rrk1/pp1n3p/3q2pQ/2p1pb2/2PP4/2P3N1/P2B2PP/4RRK1 b - - 7 19",
+ "rq3rk1/ppp2ppp/1bnpb3/3N2B1/3NP3/7P/PPPQ1PP1/2KR3R w - - 7 14",
+ "r1bq1r1k/1pp1n1pp/1p1p4/4p2Q/4Pp2/1BNP4/PPP2PPP/3R1RK1 w - - 2 14",
+ "r3r1k1/2p2ppp/p1p1bn2/8/1q2P3/2NPQN2/PPP3PP/R4RK1 b - - 2 15",
+ "r1bbk1nr/pp3p1p/2n5/1N4p1/2Np1B2/8/PPP2PPP/2KR1B1R w kq - 0 13",
+ "r1bq1rk1/ppp1nppp/4n3/3p3Q/3P4/1BP1B3/PP1N2PP/R4RK1 w - - 1 16",
+ "4r1k1/r1q2ppp/ppp2n2/4P3/5Rb1/1N1BQ3/PPP3PP/R5K1 w - - 1 17",
+ "2rqkb1r/ppp2p2/2npb1p1/1N1Nn2p/2P1PP2/8/PP2B1PP/R1BQK2R b KQ - 0 11",
+ "r1bq1r1k/b1p1npp1/p2p3p/1p6/3PP3/1B2NN2/PP3PPP/R2Q1RK1 w - - 1 16",
+ "3r1rk1/p5pp/bpp1pp2/8/q1PP1P2/b3P3/P2NQRPP/1R2B1K1 b - - 6 22",
+ "r1q2rk1/2p1bppp/2Pp4/p6b/Q1PNp3/4B3/PP1R1PPP/2K4R w - - 2 18",
+ "4k2r/1pb2ppp/1p2p3/1R1p4/3P4/2r1PN2/P4PPP/1R4K1 b - 3 22",
+ "3q2k1/pb3p1p/4pbp1/2r5/PpN2N2/1P2P2P/5PP1/Q2R2K1 b - - 4 26"
+};
+
+
+////
+//// Functions
+////
+
+/// benchmark() runs a simple benchmark by letting Glaurung analyze 15
+/// positions for 60 seconds each. There are two parameters; the
+/// transposition table size and the number of search threads that should
+/// be used. The analysis is written to a file named bench.txt.
+
+void benchmark(const std::string &ttSize, const std::string &threads) {
+ Position pos;
+ Move moves[1] = {MOVE_NONE};
+ int i;
+
+ i = atoi(ttSize.c_str());
+ if(i < 4 || i > 1024) {
+ std::cerr << "The hash table size must be between 4 and 1024" << std::endl;
+ exit(EXIT_FAILURE);
+ }
+
+ i = atoi(threads.c_str());
+ if(i < 1 || i > THREAD_MAX) {
+ std::cerr << "The number of threads must be between 1 and " << THREAD_MAX
+ << std::endl;
+ exit(EXIT_FAILURE);
+ }
+
+ set_option_value("Hash", ttSize);
+ set_option_value("Threads", threads);
+ set_option_value("OwnBook", "false");
+ set_option_value("Use Search Log", "true");
+ set_option_value("Search Log Filename", "bench.txt");
+
+ for(i = 0; i < 15; i++) {
+ pos.from_fen(BenchmarkPositions[i]);
+ think(pos, true, false, 0, 0, 0, 0, 0, 60000, moves);
+ }
+
+}
37 src/benchmark.h
@@ -0,0 +1,37 @@
+/*
+ Glaurung, a UCI chess playing engine.
+ Copyright (C) 2004-2008 Tord Romstad
+
+ Glaurung is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Glaurung is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+#if !defined(BENCHMARK_H_INCLUDED)
+#define BENCHMARK_H_INCLUDED
+
+////
+//// Includes
+////
+
+#include <string>
+
+
+////
+//// Prototypes
+////
+
+extern void benchmark(const std::string &ttSize, const std::string &threads);
+
+
+#endif // !defined(BENCHMARK_H_INCLUDED)
348 src/bitbase.cpp
@@ -0,0 +1,348 @@
+/*
+ Glaurung, a UCI chess playing engine.
+ Copyright (C) 2004-2008 Tord Romstad
+
+ Glaurung is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Glaurung is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+////
+//// Includes
+////
+
+#include <cassert>
+
+#include "bitbase.h"
+#include "bitboard.h"
+#include "move.h"
+#include "square.h"
+
+
+////
+//// Local definitions
+////
+
+namespace {
+
+ enum Result {
+ RESULT_UNKNOWN,
+ RESULT_INVALID,
+ RESULT_WIN,
+ RESULT_LOSS,
+ RESULT_DRAW
+ };
+
+ struct KPKPosition {
+ void from_index(int index);
+ int to_index() const;
+ bool is_legal() const;
+ bool is_immediate_draw() const;
+ bool is_immediate_win() const;
+ Bitboard wk_attacks() const;
+ Bitboard bk_attacks() const;
+ Bitboard pawn_attacks() const;
+
+ Square whiteKingSquare, blackKingSquare, pawnSquare;
+ Color sideToMove;
+ };
+
+
+ Result *Bitbase;
+ const int IndexMax = 2*24*64*64;
+ int UnknownCount = 0;
+
+ void initialize();
+ bool next_iteration();
+ Result classify_wtm(const KPKPosition &p);
+ Result classify_btm(const KPKPosition &p);
+ int compute_index(Square wksq, Square bksq, Square psq, Color stm);
+ int compress_result(Result r);
+
+}
+
+
+////
+//// Functions
+////
+
+void generate_kpk_bitbase(uint8_t bitbase[]) {
+ // Allocate array and initialize:
+ Bitbase = new Result[IndexMax];
+ initialize();
+
+ // Iterate until all positions are classified:
+ while(next_iteration());
+
+ // Compress bitbase into the supplied parameter:
+ int i, j, b;
+ for(i = 0; i < 24576; i++) {
+ for(b = 0, j = 0; j < 8; b |= (compress_result(Bitbase[8*i+j]) << j), j++);
+ bitbase[i] = b;
+ }
+
+ // Release allocated memory:
+ delete [] Bitbase;
+}
+
+
+namespace {
+
+ void KPKPosition::from_index(int index) {
+ int s;
+ sideToMove = Color(index % 2);
+ blackKingSquare = Square((index / 2) % 64);
+ whiteKingSquare = Square((index / 128) % 64);
+ s = (index / 8192) % 24;
+ pawnSquare = make_square(File(s % 4), Rank(s / 4 + 1));
+ }
+
+
+ int KPKPosition::to_index() const {
+ return compute_index(whiteKingSquare, blackKingSquare, pawnSquare,
+ sideToMove);
+ }
+
+
+ bool KPKPosition::is_legal() const {
+ if(whiteKingSquare == pawnSquare || whiteKingSquare == blackKingSquare ||
+ pawnSquare == blackKingSquare)
+ return false;
+ if(sideToMove == WHITE) {
+ if(bit_is_set(this->wk_attacks(), blackKingSquare))
+ return false;
+ if(bit_is_set(this->pawn_attacks(), blackKingSquare))
+ return false;
+ }
+ else {
+ if(bit_is_set(this->bk_attacks(), whiteKingSquare))
+ return false;
+ }
+ return true;
+ }
+
+
+ bool KPKPosition::is_immediate_draw() const {
+ if(sideToMove == BLACK) {
+ Bitboard wka = this->wk_attacks();
+ Bitboard bka = this->bk_attacks();
+
+ // Case 1: Stalemate
+ if((bka & ~(wka | this->pawn_attacks())) == EmptyBoardBB)
+ return true;
+
+ // Case 2: King can capture pawn
+ if(bit_is_set(bka, pawnSquare) && !bit_is_set(wka, pawnSquare))
+ return true;
+ }
+ else {
+ // Case 1: Stalemate
+ if(whiteKingSquare == SQ_A8 && pawnSquare == SQ_A7 &&
+ (blackKingSquare == SQ_C7 || blackKingSquare == SQ_C8))
+ return true;
+ }
+
+ return false;
+ }
+
+
+ bool KPKPosition::is_immediate_win() const {
+ // The position is an immediate win if it is white to move and the white
+ // pawn can be promoted without getting captured:
+ return
+ sideToMove == WHITE &&
+ square_rank(pawnSquare) == RANK_7 &&
+ (square_distance(blackKingSquare, pawnSquare+DELTA_N) > 1 ||
+ bit_is_set(this->wk_attacks(), pawnSquare+DELTA_N));
+ }
+
+
+ Bitboard KPKPosition::wk_attacks() const {
+ return StepAttackBB[WK][whiteKingSquare];
+ }
+
+
+ Bitboard KPKPosition::bk_attacks() const {
+ return StepAttackBB[BK][blackKingSquare];
+ }
+
+
+ Bitboard KPKPosition::pawn_attacks() const {
+ return StepAttackBB[WP][pawnSquare];
+ }
+
+
+ void initialize() {
+ KPKPosition p;
+ for(int i = 0; i < IndexMax; i++) {
+ p.from_index(i);
+ if(!p.is_legal())
+ Bitbase[i] = RESULT_INVALID;
+ else if(p.is_immediate_draw())
+ Bitbase[i] = RESULT_DRAW;
+ else if(p.is_immediate_win())
+ Bitbase[i] = RESULT_WIN;
+ else {
+ Bitbase[i] = RESULT_UNKNOWN;
+ UnknownCount++;
+ }
+ }
+ }
+
+
+ bool next_iteration() {
+ KPKPosition p;
+ int previousUnknownCount = UnknownCount;
+
+ for(int i = 0; i < IndexMax; i++)
+ if(Bitbase[i] == RESULT_UNKNOWN) {
+ p.from_index(i);
+
+ Bitbase[i] = (p.sideToMove == WHITE)? classify_wtm(p) : classify_btm(p);
+
+ if(Bitbase[i] == RESULT_WIN || Bitbase[i] == RESULT_LOSS ||
+ Bitbase[i] == RESULT_DRAW)
+ UnknownCount--;
+ }
+
+ return UnknownCount != previousUnknownCount;
+ }
+
+
+ Result classify_wtm(const KPKPosition &p) {
+
+ // If one move leads to a position classified as RESULT_LOSS, the result
+ // of the current position is RESULT_WIN. If all moves lead to positions
+ // classified as RESULT_DRAW, the current position is classified as
+ // RESULT_DRAW. Otherwise, the current position is classified as
+ // RESULT_UNKNOWN.
+
+ bool unknownFound = false;
+ Bitboard b;
+ Square s;
+
+ // King moves
+ b = p.wk_attacks();
+ while(b) {
+ s = pop_1st_bit(&b);
+ switch(Bitbase[compute_index(s, p.blackKingSquare, p.pawnSquare,
+ BLACK)]) {
+ case RESULT_LOSS:
+ return RESULT_WIN;
+
+ case RESULT_UNKNOWN:
+ unknownFound = true;
+ break;
+
+ case RESULT_DRAW: case RESULT_INVALID:
+ break;
+
+ default:
+ assert(false);
+ }
+ }
+
+ // Pawn moves
+ if(square_rank(p.pawnSquare) < RANK_7) {
+ s = p.pawnSquare + DELTA_N;
+ switch(Bitbase[compute_index(p.whiteKingSquare, p.blackKingSquare, s,
+ BLACK)]) {
+ case RESULT_LOSS:
+ return RESULT_WIN;
+
+ case RESULT_UNKNOWN:
+ unknownFound = true;
+ break;
+
+ case RESULT_DRAW: case RESULT_INVALID:
+ break;
+
+ default:
+ assert(false);
+ }
+
+ if(square_rank(s) == RANK_3 &&
+ s != p.whiteKingSquare && s != p.blackKingSquare) {
+ s += DELTA_N;
+ switch(Bitbase[compute_index(p.whiteKingSquare, p.blackKingSquare, s,
+ BLACK)]) {
+ case RESULT_LOSS:
+ return RESULT_WIN;
+
+ case RESULT_UNKNOWN:
+ unknownFound = true;
+ break;
+
+ case RESULT_DRAW: case RESULT_INVALID:
+ break;
+
+ default:
+ assert(false);
+ }
+ }
+ }
+
+ return unknownFound? RESULT_UNKNOWN : RESULT_DRAW;
+ }
+
+
+ Result classify_btm(const KPKPosition &p) {
+
+ // If one move leads to a position classified as RESULT_DRAW, the result
+ // of the current position is RESULT_DRAW. If all moves lead to positions
+ // classified as RESULT_WIN, the current position is classified as
+ // RESULT_LOSS. Otherwise, the current position is classified as
+ // RESULT_UNKNOWN.
+
+ bool unknownFound = false;
+ Bitboard b;
+ Square s;
+
+ // King moves
+ b = p.bk_attacks();
+ while(b) {
+ s = pop_1st_bit(&b);
+ switch(Bitbase[compute_index(p.whiteKingSquare, s, p.pawnSquare,
+ WHITE)]) {
+ case RESULT_DRAW:
+ return RESULT_DRAW;
+
+ case RESULT_UNKNOWN:
+ unknownFound = true;
+ break;
+
+ case RESULT_WIN: case RESULT_INVALID:
+ break;
+
+ default:
+ assert(false);
+ }
+ }
+
+ return unknownFound? RESULT_UNKNOWN : RESULT_LOSS;
+ }
+
+
+ int compute_index(Square wksq, Square bksq, Square psq, Color stm) {
+ int p = int(square_file(psq)) + (int(square_rank(psq)) - 1) * 4;
+ int result = int(stm) + 2*int(bksq) + 128*int(wksq) + 8192*p;
+ assert(result >= 0 && result < IndexMax);
+ return result;
+ }
+
+
+ int compress_result(Result r) {
+ return (r == RESULT_WIN || r == RESULT_LOSS)? 1 : 0;
+ }
+
+}
37 src/bitbase.h
@@ -0,0 +1,37 @@
+/*
+ Glaurung, a UCI chess playing engine.
+ Copyright (C) 2004-2008 Tord Romstad
+
+ Glaurung is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Glaurung is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+#if !defined(BITBASE_H_INCLUDED)
+#define BITBASE_H_INCLUDED
+
+////
+//// Includes
+////
+
+#include "types.h"
+
+
+////
+//// Prototypes
+////
+
+extern void generate_kpk_bitbase(uint8_t bitbase[]);
+
+
+#endif // !defined(BITBASE_H_INCLUDED)
541 src/bitboard.cpp
@@ -0,0 +1,541 @@
+/*
+ Glaurung, a UCI chess playing engine.
+ Copyright (C) 2004-2008 Tord Romstad
+
+ Glaurung is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Glaurung is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+////
+//// Includes
+////
+
+#include <iostream>
+
+#include "bitboard.h"
+#include "direction.h"
+
+
+////
+//// Constants and variables
+////
+
+const Bitboard SquaresByColorBB[2] = {BlackSquaresBB, WhiteSquaresBB};
+
+const Bitboard FileBB[8] = {
+ FileABB, FileBBB, FileCBB, FileDBB, FileEBB, FileFBB, FileGBB, FileHBB
+};
+
+const Bitboard NeighboringFilesBB[8] = {
+ FileBBB, FileABB|FileCBB, FileBBB|FileDBB, FileCBB|FileEBB,
+ FileDBB|FileFBB, FileEBB|FileGBB, FileFBB|FileHBB, FileGBB
+};
+
+const Bitboard ThisAndNeighboringFilesBB[8] = {
+ FileABB|FileBBB, FileABB|FileBBB|FileCBB,
+ FileBBB|FileCBB|FileDBB, FileCBB|FileDBB|FileEBB,
+ FileDBB|FileEBB|FileFBB, FileEBB|FileFBB|FileGBB,
+ FileFBB|FileGBB|FileHBB, FileGBB|FileHBB
+};
+
+const Bitboard RankBB[8] = {
+ Rank1BB, Rank2BB, Rank3BB, Rank4BB, Rank5BB, Rank6BB, Rank7BB, Rank8BB
+};
+
+const Bitboard RelativeRankBB[2][8] = {
+ {
+ Rank1BB, Rank2BB, Rank3BB, Rank4BB, Rank5BB, Rank6BB, Rank7BB, Rank8BB
+ },
+ {
+ Rank8BB, Rank7BB, Rank6BB, Rank5BB, Rank4BB, Rank3BB, Rank2BB, Rank1BB
+ }
+};
+
+const Bitboard InFrontBB[2][8] = {
+ {
+ Rank2BB | Rank3BB | Rank4BB | Rank5BB | Rank6BB | Rank7BB | Rank8BB,
+ Rank3BB | Rank4BB | Rank5BB | Rank6BB | Rank7BB | Rank8BB,
+ Rank4BB | Rank5BB | Rank6BB | Rank7BB | Rank8BB,
+ Rank5BB | Rank6BB | Rank7BB | Rank8BB,
+ Rank6BB | Rank7BB | Rank8BB,
+ Rank7BB | Rank8BB,
+ Rank8BB,
+ EmptyBoardBB
+ },
+ {
+ EmptyBoardBB,
+ Rank1BB,
+ Rank2BB | Rank1BB,
+ Rank3BB | Rank2BB | Rank1BB,
+ Rank4BB | Rank3BB | Rank2BB | Rank1BB,
+ Rank5BB | Rank4BB | Rank3BB | Rank2BB | Rank1BB,
+ Rank6BB | Rank5BB | Rank4BB | Rank3BB | Rank2BB | Rank1BB,
+ Rank7BB | Rank6BB | Rank5BB | Rank4BB | Rank3BB | Rank2BB | Rank1BB
+ }
+};
+
+#if defined(USE_COMPACT_ROOK_ATTACKS)
+
+Bitboard RankAttacks[8][64], FileAttacks[8][64];
+
+#elif defined(USE_32BIT_ATTACKS)
+
+const uint64_t RMult[64] = {
+ 0xd7445cdec88002c0ULL, 0xd0a505c1f2001722ULL, 0xe065d1c896002182ULL,
+ 0x9a8c41e75a000892ULL, 0x8900b10c89002aa8ULL, 0x9b28d1c1d60005a2ULL,
+ 0x15d6c88de002d9aULL, 0xb1dbfc802e8016a9ULL, 0x149a1042d9d60029ULL,
+ 0xb9c08050599e002fULL, 0x132208c3af300403ULL, 0xc1000ce2e9c50070ULL,
+ 0x9d9aa13c99020012ULL, 0xb6b078daf71e0046ULL, 0x9d880182fb6e002eULL,
+ 0x52889f467e850037ULL, 0xda6dc008d19a8480ULL, 0x468286034f902420ULL,
+ 0x7140ac09dc54c020ULL, 0xd76ffffa39548808ULL, 0xea901c4141500808ULL,
+ 0xc91004093f953a02ULL, 0x2882afa8f6bb402ULL, 0xaebe335692442c01ULL,
+ 0xe904a22079fb91eULL, 0x13a514851055f606ULL, 0x76c782018c8fe632ULL,
+ 0x1dc012a9d116da06ULL, 0x3c9e0037264fffa6ULL, 0x2036002853c6e4a2ULL,
+ 0xe3fe08500afb47d4ULL, 0xf38af25c86b025c2ULL, 0xc0800e2182cf9a40ULL,
+ 0x72002480d1f60673ULL, 0x2500200bae6e9b53ULL, 0xc60018c1eefca252ULL,
+ 0x600590473e3608aULL, 0x46002c4ab3fe51b2ULL, 0xa200011486bcc8d2ULL,
+ 0xb680078095784c63ULL, 0x2742002639bf11aeULL, 0xc7d60021a5bdb142ULL,
+ 0xc8c04016bb83d820ULL, 0xbd520028123b4842ULL, 0x9d1600344ac2a832ULL,
+ 0x6a808005631c8a05ULL, 0x604600a148d5389aULL, 0xe2e40103d40dea65ULL,
+ 0x945b5a0087c62a81ULL, 0x12dc200cd82d28eULL, 0x2431c600b5f9ef76ULL,
+ 0xfb142a006a9b314aULL, 0x6870e00a1c97d62ULL, 0x2a9db2004a2689a2ULL,
+ 0xd3594600caf5d1a2ULL, 0xee0e4900439344a7ULL, 0x89c4d266ca25007aULL,
+ 0x3e0013a2743f97e3ULL, 0x180e31a0431378aULL, 0x3a9e465a4d42a512ULL,
+ 0x98d0a11a0c0d9cc2ULL, 0x8e711c1aba19b01eULL, 0x8dcdc836dd201142ULL,
+ 0x5ac08a4735370479ULL,
+};
+
+const int RShift[64] = {
+ 20, 21, 21, 21, 21, 21, 21, 20, 21, 22, 22, 22, 22, 22, 22, 21,
+ 21, 22, 22, 22, 22, 22, 22, 21, 21, 22, 22, 22, 22, 22, 22, 21,
+ 21, 22, 22, 22, 22, 22, 22, 21, 21, 22, 22, 22, 22, 22, 22, 21,
+ 21, 22, 22, 22, 22, 22, 22, 21, 20, 21, 21, 21, 21, 21, 21, 20
+};
+