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https://github.com/sockspls/badfish
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Retire Polyglot Book management
Book handling belongs to GUI, we kept this code for historical reasons, but nowdays there is really no need of this old, (mostly) unused and especially incorrect designed functionality. It is up to the GUI to choose the book (far easier for the user) and to select the book parameters. In no place, including fishtest, TCEC, rating lists, etc. the "own book" is used, moreover currently SF is released without any book and even if in the future we bundle a book in the release package, it will be the GUI that will take care of it. This corrects a wrong design decision that Galurung and later Stockfish inherited from what was common practice many yeas ago. No functional change.
This commit is contained in:
Marco Costalba
parent
e4fc9d84d7
commit
f4dcec0b94
6 changed files with 5 additions and 544 deletions
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@ -38,9 +38,9 @@ BINDIR = $(PREFIX)/bin
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PGOBENCH = ./$(EXE) bench 32 1 1 default time
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### Object files
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OBJS = benchmark.o bitbase.o bitboard.o book.o endgame.o evaluate.o main.o \
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material.o misc.o movegen.o movepick.o notation.o pawns.o position.o \
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search.o thread.o timeman.o tt.o uci.o ucioption.o
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OBJS = benchmark.o bitbase.o bitboard.o endgame.o evaluate.o main.o \
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material.o misc.o movegen.o movepick.o notation.o pawns.o \
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position.o search.o thread.o timeman.o tt.o uci.o ucioption.o
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### ==========================================================================
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### Section 2. High-level Configuration
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478
src/book.cpp
478
src/book.cpp
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@ -1,478 +0,0 @@
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/*
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Stockfish, a UCI chess playing engine derived from Glaurung 2.1
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Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
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Copyright (C) 2008-2014 Marco Costalba, Joona Kiiski, Tord Romstad
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Stockfish is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Stockfish is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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The code in this file is based on the opening book code in PolyGlot
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by Fabien Letouzey. PolyGlot is available under the GNU General
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Public License, and can be downloaded from http://wbec-ridderkerk.nl
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*/
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#include <algorithm>
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#include <cassert>
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#include "book.h"
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#include "misc.h"
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#include "movegen.h"
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using namespace std;
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namespace {
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// A Polyglot book is a series of "entries" of 16 bytes. All integers are
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// stored in big-endian format, with the highest byte first (regardless of
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// size). The entries are ordered according to the key in ascending order.
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struct Entry {
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uint64_t key;
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uint16_t move;
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uint16_t count;
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uint32_t learn;
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};
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// Random numbers from PolyGlot, used to compute book hash keys
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const union {
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Key PolyGlotRandoms[781];
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struct {
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Key psq[12][64]; // [piece][square]
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Key castling[4]; // [castling flag]
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Key enpassant[8]; // [file]
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Key turn;
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} Zobrist;
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} PG = {{
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|
||||
0xC37B45B3F8D6F2BAULL, 0xC3A9DC228CAAC9E9ULL, 0xF3B8B6675A6507FFULL,
|
||||
0x9FC477DE4ED681DAULL, 0x67378D8ECCEF96CBULL, 0x6DD856D94D259236ULL,
|
||||
0xA319CE15B0B4DB31ULL, 0x073973751F12DD5EULL, 0x8A8E849EB32781A5ULL,
|
||||
0xE1925C71285279F5ULL, 0x74C04BF1790C0EFEULL, 0x4DDA48153C94938AULL,
|
||||
0x9D266D6A1CC0542CULL, 0x7440FB816508C4FEULL, 0x13328503DF48229FULL,
|
||||
0xD6BF7BAEE43CAC40ULL, 0x4838D65F6EF6748FULL, 0x1E152328F3318DEAULL,
|
||||
0x8F8419A348F296BFULL, 0x72C8834A5957B511ULL, 0xD7A023A73260B45CULL,
|
||||
0x94EBC8ABCFB56DAEULL, 0x9FC10D0F989993E0ULL, 0xDE68A2355B93CAE6ULL,
|
||||
0xA44CFE79AE538BBEULL, 0x9D1D84FCCE371425ULL, 0x51D2B1AB2DDFB636ULL,
|
||||
0x2FD7E4B9E72CD38CULL, 0x65CA5B96B7552210ULL, 0xDD69A0D8AB3B546DULL,
|
||||
0x604D51B25FBF70E2ULL, 0x73AA8A564FB7AC9EULL, 0x1A8C1E992B941148ULL,
|
||||
0xAAC40A2703D9BEA0ULL, 0x764DBEAE7FA4F3A6ULL, 0x1E99B96E70A9BE8BULL,
|
||||
0x2C5E9DEB57EF4743ULL, 0x3A938FEE32D29981ULL, 0x26E6DB8FFDF5ADFEULL,
|
||||
0x469356C504EC9F9DULL, 0xC8763C5B08D1908CULL, 0x3F6C6AF859D80055ULL,
|
||||
0x7F7CC39420A3A545ULL, 0x9BFB227EBDF4C5CEULL, 0x89039D79D6FC5C5CULL,
|
||||
0x8FE88B57305E2AB6ULL, 0xA09E8C8C35AB96DEULL, 0xFA7E393983325753ULL,
|
||||
0xD6B6D0ECC617C699ULL, 0xDFEA21EA9E7557E3ULL, 0xB67C1FA481680AF8ULL,
|
||||
0xCA1E3785A9E724E5ULL, 0x1CFC8BED0D681639ULL, 0xD18D8549D140CAEAULL,
|
||||
0x4ED0FE7E9DC91335ULL, 0xE4DBF0634473F5D2ULL, 0x1761F93A44D5AEFEULL,
|
||||
0x53898E4C3910DA55ULL, 0x734DE8181F6EC39AULL, 0x2680B122BAA28D97ULL,
|
||||
0x298AF231C85BAFABULL, 0x7983EED3740847D5ULL, 0x66C1A2A1A60CD889ULL,
|
||||
0x9E17E49642A3E4C1ULL, 0xEDB454E7BADC0805ULL, 0x50B704CAB602C329ULL,
|
||||
0x4CC317FB9CDDD023ULL, 0x66B4835D9EAFEA22ULL, 0x219B97E26FFC81BDULL,
|
||||
0x261E4E4C0A333A9DULL, 0x1FE2CCA76517DB90ULL, 0xD7504DFA8816EDBBULL,
|
||||
0xB9571FA04DC089C8ULL, 0x1DDC0325259B27DEULL, 0xCF3F4688801EB9AAULL,
|
||||
0xF4F5D05C10CAB243ULL, 0x38B6525C21A42B0EULL, 0x36F60E2BA4FA6800ULL,
|
||||
0xEB3593803173E0CEULL, 0x9C4CD6257C5A3603ULL, 0xAF0C317D32ADAA8AULL,
|
||||
0x258E5A80C7204C4BULL, 0x8B889D624D44885DULL, 0xF4D14597E660F855ULL,
|
||||
0xD4347F66EC8941C3ULL, 0xE699ED85B0DFB40DULL, 0x2472F6207C2D0484ULL,
|
||||
0xC2A1E7B5B459AEB5ULL, 0xAB4F6451CC1D45ECULL, 0x63767572AE3D6174ULL,
|
||||
0xA59E0BD101731A28ULL, 0x116D0016CB948F09ULL, 0x2CF9C8CA052F6E9FULL,
|
||||
0x0B090A7560A968E3ULL, 0xABEEDDB2DDE06FF1ULL, 0x58EFC10B06A2068DULL,
|
||||
0xC6E57A78FBD986E0ULL, 0x2EAB8CA63CE802D7ULL, 0x14A195640116F336ULL,
|
||||
0x7C0828DD624EC390ULL, 0xD74BBE77E6116AC7ULL, 0x804456AF10F5FB53ULL,
|
||||
0xEBE9EA2ADF4321C7ULL, 0x03219A39EE587A30ULL, 0x49787FEF17AF9924ULL,
|
||||
0xA1E9300CD8520548ULL, 0x5B45E522E4B1B4EFULL, 0xB49C3B3995091A36ULL,
|
||||
0xD4490AD526F14431ULL, 0x12A8F216AF9418C2ULL, 0x001F837CC7350524ULL,
|
||||
0x1877B51E57A764D5ULL, 0xA2853B80F17F58EEULL, 0x993E1DE72D36D310ULL,
|
||||
0xB3598080CE64A656ULL, 0x252F59CF0D9F04BBULL, 0xD23C8E176D113600ULL,
|
||||
0x1BDA0492E7E4586EULL, 0x21E0BD5026C619BFULL, 0x3B097ADAF088F94EULL,
|
||||
0x8D14DEDB30BE846EULL, 0xF95CFFA23AF5F6F4ULL, 0x3871700761B3F743ULL,
|
||||
0xCA672B91E9E4FA16ULL, 0x64C8E531BFF53B55ULL, 0x241260ED4AD1E87DULL,
|
||||
0x106C09B972D2E822ULL, 0x7FBA195410E5CA30ULL, 0x7884D9BC6CB569D8ULL,
|
||||
0x0647DFEDCD894A29ULL, 0x63573FF03E224774ULL, 0x4FC8E9560F91B123ULL,
|
||||
0x1DB956E450275779ULL, 0xB8D91274B9E9D4FBULL, 0xA2EBEE47E2FBFCE1ULL,
|
||||
0xD9F1F30CCD97FB09ULL, 0xEFED53D75FD64E6BULL, 0x2E6D02C36017F67FULL,
|
||||
0xA9AA4D20DB084E9BULL, 0xB64BE8D8B25396C1ULL, 0x70CB6AF7C2D5BCF0ULL,
|
||||
0x98F076A4F7A2322EULL, 0xBF84470805E69B5FULL, 0x94C3251F06F90CF3ULL,
|
||||
0x3E003E616A6591E9ULL, 0xB925A6CD0421AFF3ULL, 0x61BDD1307C66E300ULL,
|
||||
0xBF8D5108E27E0D48ULL, 0x240AB57A8B888B20ULL, 0xFC87614BAF287E07ULL,
|
||||
0xEF02CDD06FFDB432ULL, 0xA1082C0466DF6C0AULL, 0x8215E577001332C8ULL,
|
||||
0xD39BB9C3A48DB6CFULL, 0x2738259634305C14ULL, 0x61CF4F94C97DF93DULL,
|
||||
0x1B6BACA2AE4E125BULL, 0x758F450C88572E0BULL, 0x959F587D507A8359ULL,
|
||||
0xB063E962E045F54DULL, 0x60E8ED72C0DFF5D1ULL, 0x7B64978555326F9FULL,
|
||||
0xFD080D236DA814BAULL, 0x8C90FD9B083F4558ULL, 0x106F72FE81E2C590ULL,
|
||||
0x7976033A39F7D952ULL, 0xA4EC0132764CA04BULL, 0x733EA705FAE4FA77ULL,
|
||||
0xB4D8F77BC3E56167ULL, 0x9E21F4F903B33FD9ULL, 0x9D765E419FB69F6DULL,
|
||||
0xD30C088BA61EA5EFULL, 0x5D94337FBFAF7F5BULL, 0x1A4E4822EB4D7A59ULL,
|
||||
0x6FFE73E81B637FB3ULL, 0xDDF957BC36D8B9CAULL, 0x64D0E29EEA8838B3ULL,
|
||||
0x08DD9BDFD96B9F63ULL, 0x087E79E5A57D1D13ULL, 0xE328E230E3E2B3FBULL,
|
||||
0x1C2559E30F0946BEULL, 0x720BF5F26F4D2EAAULL, 0xB0774D261CC609DBULL,
|
||||
0x443F64EC5A371195ULL, 0x4112CF68649A260EULL, 0xD813F2FAB7F5C5CAULL,
|
||||
0x660D3257380841EEULL, 0x59AC2C7873F910A3ULL, 0xE846963877671A17ULL,
|
||||
0x93B633ABFA3469F8ULL, 0xC0C0F5A60EF4CDCFULL, 0xCAF21ECD4377B28CULL,
|
||||
0x57277707199B8175ULL, 0x506C11B9D90E8B1DULL, 0xD83CC2687A19255FULL,
|
||||
0x4A29C6465A314CD1ULL, 0xED2DF21216235097ULL, 0xB5635C95FF7296E2ULL,
|
||||
0x22AF003AB672E811ULL, 0x52E762596BF68235ULL, 0x9AEBA33AC6ECC6B0ULL,
|
||||
0x944F6DE09134DFB6ULL, 0x6C47BEC883A7DE39ULL, 0x6AD047C430A12104ULL,
|
||||
0xA5B1CFDBA0AB4067ULL, 0x7C45D833AFF07862ULL, 0x5092EF950A16DA0BULL,
|
||||
0x9338E69C052B8E7BULL, 0x455A4B4CFE30E3F5ULL, 0x6B02E63195AD0CF8ULL,
|
||||
0x6B17B224BAD6BF27ULL, 0xD1E0CCD25BB9C169ULL, 0xDE0C89A556B9AE70ULL,
|
||||
0x50065E535A213CF6ULL, 0x9C1169FA2777B874ULL, 0x78EDEFD694AF1EEDULL,
|
||||
0x6DC93D9526A50E68ULL, 0xEE97F453F06791EDULL, 0x32AB0EDB696703D3ULL,
|
||||
0x3A6853C7E70757A7ULL, 0x31865CED6120F37DULL, 0x67FEF95D92607890ULL,
|
||||
0x1F2B1D1F15F6DC9CULL, 0xB69E38A8965C6B65ULL, 0xAA9119FF184CCCF4ULL,
|
||||
0xF43C732873F24C13ULL, 0xFB4A3D794A9A80D2ULL, 0x3550C2321FD6109CULL,
|
||||
0x371F77E76BB8417EULL, 0x6BFA9AAE5EC05779ULL, 0xCD04F3FF001A4778ULL,
|
||||
0xE3273522064480CAULL, 0x9F91508BFFCFC14AULL, 0x049A7F41061A9E60ULL,
|
||||
0xFCB6BE43A9F2FE9BULL, 0x08DE8A1C7797DA9BULL, 0x8F9887E6078735A1ULL,
|
||||
0xB5B4071DBFC73A66ULL, 0x230E343DFBA08D33ULL, 0x43ED7F5A0FAE657DULL,
|
||||
0x3A88A0FBBCB05C63ULL, 0x21874B8B4D2DBC4FULL, 0x1BDEA12E35F6A8C9ULL,
|
||||
0x53C065C6C8E63528ULL, 0xE34A1D250E7A8D6BULL, 0xD6B04D3B7651DD7EULL,
|
||||
0x5E90277E7CB39E2DULL, 0x2C046F22062DC67DULL, 0xB10BB459132D0A26ULL,
|
||||
0x3FA9DDFB67E2F199ULL, 0x0E09B88E1914F7AFULL, 0x10E8B35AF3EEAB37ULL,
|
||||
0x9EEDECA8E272B933ULL, 0xD4C718BC4AE8AE5FULL, 0x81536D601170FC20ULL,
|
||||
0x91B534F885818A06ULL, 0xEC8177F83F900978ULL, 0x190E714FADA5156EULL,
|
||||
0xB592BF39B0364963ULL, 0x89C350C893AE7DC1ULL, 0xAC042E70F8B383F2ULL,
|
||||
0xB49B52E587A1EE60ULL, 0xFB152FE3FF26DA89ULL, 0x3E666E6F69AE2C15ULL,
|
||||
0x3B544EBE544C19F9ULL, 0xE805A1E290CF2456ULL, 0x24B33C9D7ED25117ULL,
|
||||
0xE74733427B72F0C1ULL, 0x0A804D18B7097475ULL, 0x57E3306D881EDB4FULL,
|
||||
0x4AE7D6A36EB5DBCBULL, 0x2D8D5432157064C8ULL, 0xD1E649DE1E7F268BULL,
|
||||
0x8A328A1CEDFE552CULL, 0x07A3AEC79624C7DAULL, 0x84547DDC3E203C94ULL,
|
||||
0x990A98FD5071D263ULL, 0x1A4FF12616EEFC89ULL, 0xF6F7FD1431714200ULL,
|
||||
0x30C05B1BA332F41CULL, 0x8D2636B81555A786ULL, 0x46C9FEB55D120902ULL,
|
||||
0xCCEC0A73B49C9921ULL, 0x4E9D2827355FC492ULL, 0x19EBB029435DCB0FULL,
|
||||
0x4659D2B743848A2CULL, 0x963EF2C96B33BE31ULL, 0x74F85198B05A2E7DULL,
|
||||
0x5A0F544DD2B1FB18ULL, 0x03727073C2E134B1ULL, 0xC7F6AA2DE59AEA61ULL,
|
||||
0x352787BAA0D7C22FULL, 0x9853EAB63B5E0B35ULL, 0xABBDCDD7ED5C0860ULL,
|
||||
0xCF05DAF5AC8D77B0ULL, 0x49CAD48CEBF4A71EULL, 0x7A4C10EC2158C4A6ULL,
|
||||
0xD9E92AA246BF719EULL, 0x13AE978D09FE5557ULL, 0x730499AF921549FFULL,
|
||||
0x4E4B705B92903BA4ULL, 0xFF577222C14F0A3AULL, 0x55B6344CF97AAFAEULL,
|
||||
0xB862225B055B6960ULL, 0xCAC09AFBDDD2CDB4ULL, 0xDAF8E9829FE96B5FULL,
|
||||
0xB5FDFC5D3132C498ULL, 0x310CB380DB6F7503ULL, 0xE87FBB46217A360EULL,
|
||||
0x2102AE466EBB1148ULL, 0xF8549E1A3AA5E00DULL, 0x07A69AFDCC42261AULL,
|
||||
0xC4C118BFE78FEAAEULL, 0xF9F4892ED96BD438ULL, 0x1AF3DBE25D8F45DAULL,
|
||||
0xF5B4B0B0D2DEEEB4ULL, 0x962ACEEFA82E1C84ULL, 0x046E3ECAAF453CE9ULL,
|
||||
0xF05D129681949A4CULL, 0x964781CE734B3C84ULL, 0x9C2ED44081CE5FBDULL,
|
||||
0x522E23F3925E319EULL, 0x177E00F9FC32F791ULL, 0x2BC60A63A6F3B3F2ULL,
|
||||
0x222BBFAE61725606ULL, 0x486289DDCC3D6780ULL, 0x7DC7785B8EFDFC80ULL,
|
||||
0x8AF38731C02BA980ULL, 0x1FAB64EA29A2DDF7ULL, 0xE4D9429322CD065AULL,
|
||||
0x9DA058C67844F20CULL, 0x24C0E332B70019B0ULL, 0x233003B5A6CFE6ADULL,
|
||||
0xD586BD01C5C217F6ULL, 0x5E5637885F29BC2BULL, 0x7EBA726D8C94094BULL,
|
||||
0x0A56A5F0BFE39272ULL, 0xD79476A84EE20D06ULL, 0x9E4C1269BAA4BF37ULL,
|
||||
0x17EFEE45B0DEE640ULL, 0x1D95B0A5FCF90BC6ULL, 0x93CBE0B699C2585DULL,
|
||||
0x65FA4F227A2B6D79ULL, 0xD5F9E858292504D5ULL, 0xC2B5A03F71471A6FULL,
|
||||
0x59300222B4561E00ULL, 0xCE2F8642CA0712DCULL, 0x7CA9723FBB2E8988ULL,
|
||||
0x2785338347F2BA08ULL, 0xC61BB3A141E50E8CULL, 0x150F361DAB9DEC26ULL,
|
||||
0x9F6A419D382595F4ULL, 0x64A53DC924FE7AC9ULL, 0x142DE49FFF7A7C3DULL,
|
||||
0x0C335248857FA9E7ULL, 0x0A9C32D5EAE45305ULL, 0xE6C42178C4BBB92EULL,
|
||||
0x71F1CE2490D20B07ULL, 0xF1BCC3D275AFE51AULL, 0xE728E8C83C334074ULL,
|
||||
0x96FBF83A12884624ULL, 0x81A1549FD6573DA5ULL, 0x5FA7867CAF35E149ULL,
|
||||
0x56986E2EF3ED091BULL, 0x917F1DD5F8886C61ULL, 0xD20D8C88C8FFE65FULL,
|
||||
0x31D71DCE64B2C310ULL, 0xF165B587DF898190ULL, 0xA57E6339DD2CF3A0ULL,
|
||||
0x1EF6E6DBB1961EC9ULL, 0x70CC73D90BC26E24ULL, 0xE21A6B35DF0C3AD7ULL,
|
||||
0x003A93D8B2806962ULL, 0x1C99DED33CB890A1ULL, 0xCF3145DE0ADD4289ULL,
|
||||
0xD0E4427A5514FB72ULL, 0x77C621CC9FB3A483ULL, 0x67A34DAC4356550BULL,
|
||||
0xF8D626AAAF278509ULL
|
||||
}};
|
||||
|
||||
// polyglot_key() returns the PolyGlot hash key of the given position
|
||||
Key polyglot_key(const Position& pos) {
|
||||
|
||||
Key key = 0;
|
||||
Bitboard b = pos.pieces();
|
||||
|
||||
while (b)
|
||||
{
|
||||
Square s = pop_lsb(&b);
|
||||
Piece pc = pos.piece_on(s);
|
||||
|
||||
// PolyGlot pieces are: BP = 0, WP = 1, BN = 2, ... BK = 10, WK = 11
|
||||
key ^= PG.Zobrist.psq[2 * (type_of(pc) - 1) + (color_of(pc) == WHITE)][s];
|
||||
}
|
||||
|
||||
b = pos.can_castle(ANY_CASTLING);
|
||||
|
||||
while (b)
|
||||
key ^= PG.Zobrist.castling[pop_lsb(&b)];
|
||||
|
||||
if (pos.ep_square() != SQ_NONE)
|
||||
key ^= PG.Zobrist.enpassant[file_of(pos.ep_square())];
|
||||
|
||||
if (pos.side_to_move() == WHITE)
|
||||
key ^= PG.Zobrist.turn;
|
||||
|
||||
return key;
|
||||
}
|
||||
|
||||
} // namespace
|
||||
|
||||
PolyglotBook::PolyglotBook() : rkiss(Time::now() % 10000) {}
|
||||
|
||||
PolyglotBook::~PolyglotBook() { if (is_open()) close(); }
|
||||
|
||||
|
||||
/// operator>>() reads sizeof(T) chars from the file's binary byte stream and
|
||||
/// converts them into a number of type T. A Polyglot book stores numbers in
|
||||
/// big-endian format.
|
||||
|
||||
template<typename T> PolyglotBook& PolyglotBook::operator>>(T& n) {
|
||||
|
||||
n = 0;
|
||||
for (size_t i = 0; i < sizeof(T); ++i)
|
||||
n = T((n << 8) + ifstream::get());
|
||||
|
||||
return *this;
|
||||
}
|
||||
|
||||
template<> PolyglotBook& PolyglotBook::operator>>(Entry& e) {
|
||||
return *this >> e.key >> e.move >> e.count >> e.learn;
|
||||
}
|
||||
|
||||
|
||||
/// open() tries to open a book file with the given name after closing any
|
||||
/// existing one.
|
||||
|
||||
bool PolyglotBook::open(const char* fName) {
|
||||
|
||||
if (is_open()) // Cannot close an already closed file
|
||||
close();
|
||||
|
||||
ifstream::open(fName, ifstream::in | ifstream::binary);
|
||||
|
||||
fileName = is_open() ? fName : "";
|
||||
ifstream::clear(); // Reset any error flag to allow a retry ifstream::open()
|
||||
return !fileName.empty();
|
||||
}
|
||||
|
||||
|
||||
/// probe() tries to find a book move for the given position. If no move is
|
||||
/// found, it returns MOVE_NONE. If pickBest is true, then it always returns
|
||||
/// the highest-rated move, otherwise it randomly chooses one based on the
|
||||
/// move score.
|
||||
|
||||
Move PolyglotBook::probe(const Position& pos, const string& fName, bool pickBest) {
|
||||
|
||||
if (fileName != fName && !open(fName.c_str()))
|
||||
return MOVE_NONE;
|
||||
|
||||
Entry e;
|
||||
uint16_t best = 0;
|
||||
unsigned sum = 0;
|
||||
Move move = MOVE_NONE;
|
||||
Key key = polyglot_key(pos);
|
||||
|
||||
seekg(find_first(key) * sizeof(Entry), ios_base::beg);
|
||||
|
||||
while (*this >> e, e.key == key && good())
|
||||
{
|
||||
best = max(best, e.count);
|
||||
sum += e.count;
|
||||
|
||||
// Choose book move according to its score. If a move has a very high
|
||||
// score it has a higher probability of being choosen than a move with
|
||||
// a lower score. Note that first entry is always chosen.
|
||||
if ( (!pickBest && sum && rkiss.rand<unsigned>() % sum < e.count)
|
||||
|| (pickBest && e.count == best))
|
||||
move = Move(e.move);
|
||||
}
|
||||
|
||||
if (!move)
|
||||
return MOVE_NONE;
|
||||
|
||||
// A PolyGlot book move is encoded as follows:
|
||||
//
|
||||
// bit 0- 5: destination square (from 0 to 63)
|
||||
// bit 6-11: origin square (from 0 to 63)
|
||||
// bit 12-14: promotion piece (from KNIGHT == 1 to QUEEN == 4)
|
||||
//
|
||||
// Castling moves follow the "king captures rook" representation. If a book
|
||||
// move is a promotion, we have to convert it to our representation and in
|
||||
// all other cases, we can directly compare with a Move after having masked
|
||||
// out the special Move flags (bit 14-15) that are not supported by PolyGlot.
|
||||
int pt = (move >> 12) & 7;
|
||||
if (pt)
|
||||
move = make<PROMOTION>(from_sq(move), to_sq(move), PieceType(pt + 1));
|
||||
|
||||
// Add 'special move' flags and verify it is legal
|
||||
for (MoveList<LEGAL> it(pos); *it; ++it)
|
||||
if (move == (*it ^ type_of(*it)))
|
||||
return *it;
|
||||
|
||||
return MOVE_NONE;
|
||||
}
|
||||
|
||||
|
||||
/// find_first() takes a book key as input, and does a binary search through
|
||||
/// the book file for the given key. Returns the index of the leftmost book
|
||||
/// entry with the same key as the input.
|
||||
|
||||
size_t PolyglotBook::find_first(Key key) {
|
||||
|
||||
seekg(0, ios::end); // Move pointer to end, so tellg() gets file's size
|
||||
|
||||
size_t low = 0, mid, high = (size_t)tellg() / sizeof(Entry) - 1;
|
||||
Entry e;
|
||||
|
||||
assert(low <= high);
|
||||
|
||||
while (low < high && good())
|
||||
{
|
||||
mid = (low + high) / 2;
|
||||
|
||||
assert(mid >= low && mid < high);
|
||||
|
||||
seekg(mid * sizeof(Entry), ios_base::beg);
|
||||
*this >> e;
|
||||
|
||||
if (key <= e.key)
|
||||
high = mid;
|
||||
else
|
||||
low = mid + 1;
|
||||
}
|
||||
|
||||
assert(low == high);
|
||||
|
||||
return low;
|
||||
}
|
||||
45
src/book.h
45
src/book.h
|
|
@ -1,45 +0,0 @@
|
|||
/*
|
||||
Stockfish, a UCI chess playing engine derived from Glaurung 2.1
|
||||
Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
|
||||
Copyright (C) 2008-2014 Marco Costalba, Joona Kiiski, Tord Romstad
|
||||
|
||||
Stockfish 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.
|
||||
|
||||
Stockfish 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/>.
|
||||
*/
|
||||
|
||||
#ifndef BOOK_H_INCLUDED
|
||||
#define BOOK_H_INCLUDED
|
||||
|
||||
#include <fstream>
|
||||
#include <string>
|
||||
|
||||
#include "position.h"
|
||||
#include "rkiss.h"
|
||||
|
||||
class PolyglotBook : private std::ifstream {
|
||||
public:
|
||||
PolyglotBook();
|
||||
~PolyglotBook();
|
||||
Move probe(const Position& pos, const std::string& fName, bool pickBest);
|
||||
|
||||
private:
|
||||
template<typename T> PolyglotBook& operator>>(T& n);
|
||||
|
||||
bool open(const char* fName);
|
||||
size_t find_first(Key key);
|
||||
|
||||
RKISS rkiss;
|
||||
std::string fileName;
|
||||
};
|
||||
|
||||
#endif // #ifndef BOOK_H_INCLUDED
|
||||
|
|
@ -25,11 +25,11 @@
|
|||
#include <iostream>
|
||||
#include <sstream>
|
||||
|
||||
#include "book.h"
|
||||
#include "evaluate.h"
|
||||
#include "movegen.h"
|
||||
#include "movepick.h"
|
||||
#include "notation.h"
|
||||
#include "rkiss.h"
|
||||
#include "search.h"
|
||||
#include "timeman.h"
|
||||
#include "thread.h"
|
||||
|
|
@ -180,8 +180,6 @@ uint64_t Search::perft(Position& pos, Depth depth) {
|
|||
|
||||
void Search::think() {
|
||||
|
||||
static PolyglotBook book; // Defined static to initialize the PRNG only once
|
||||
|
||||
RootColor = RootPos.side_to_move();
|
||||
TimeMgr.init(Limits, RootPos.game_ply(), RootColor);
|
||||
|
||||
|
|
@ -199,17 +197,6 @@ void Search::think() {
|
|||
goto finalize;
|
||||
}
|
||||
|
||||
if (Options["OwnBook"] && !Limits.infinite && !Limits.mate)
|
||||
{
|
||||
Move bookMove = book.probe(RootPos, Options["Book File"], Options["Best Book Move"]);
|
||||
|
||||
if (bookMove && std::count(RootMoves.begin(), RootMoves.end(), bookMove))
|
||||
{
|
||||
std::swap(RootMoves[0], *std::find(RootMoves.begin(), RootMoves.end(), bookMove));
|
||||
goto finalize;
|
||||
}
|
||||
}
|
||||
|
||||
if (Options["Write Search Log"])
|
||||
{
|
||||
Log log(Options["Search Log Filename"]);
|
||||
|
|
|
|||
|
|
@ -136,7 +136,7 @@ enum CastlingSide {
|
|||
KING_SIDE, QUEEN_SIDE, CASTLING_SIDE_NB = 2
|
||||
};
|
||||
|
||||
enum CastlingRight { // Defined as in PolyGlot book hash key
|
||||
enum CastlingRight {
|
||||
NO_CASTLING,
|
||||
WHITE_OO,
|
||||
WHITE_OOO = WHITE_OO << 1,
|
||||
|
|
|
|||
|
|
@ -57,15 +57,12 @@ void init(OptionsMap& o) {
|
|||
o["Write Debug Log"] << Option(false, on_logger);
|
||||
o["Write Search Log"] << Option(false);
|
||||
o["Search Log Filename"] << Option("SearchLog.txt");
|
||||
o["Book File"] << Option("book.bin");
|
||||
o["Best Book Move"] << Option(false);
|
||||
o["Contempt Factor"] << Option(0, -50, 50);
|
||||
o["Min Split Depth"] << Option(0, 0, 12, on_threads);
|
||||
o["Threads"] << Option(1, 1, MAX_THREADS, on_threads);
|
||||
o["Hash"] << Option(32, 1, 16384, on_hash_size);
|
||||
o["Clear Hash"] << Option(on_clear_hash);
|
||||
o["Ponder"] << Option(true);
|
||||
o["OwnBook"] << Option(false);
|
||||
o["MultiPV"] << Option(1, 1, 500);
|
||||
o["Skill Level"] << Option(20, 0, 20);
|
||||
o["Emergency Move Horizon"] << Option(40, 0, 50);
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue