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Author SHA1 Message Date
snicolet
c1be0c68c7 Tweak initiative formula 
Give more weight to the pawns number and
the vertical king distance in evaluate_initiative()

Passed STC:
LLR: 2.96 (-2.94,2.94) [0.00,5.00]
Total: 26729 W: 5067 L: 4825 D: 16837

and LTC:
LLR: 2.95 (-2.94,2.94) [0.00,5.00]
Total: 60480 W: 8338 L: 8016 D: 44126

Bench: 8295162

Resolves #594
 2016-03-02 00:02:03 +00:00
ElbertoOne
c13052f344 Clean up depth reduction calculation 
Might also be a slight speed up

No functional change

Resolves #593
 2016-02-28 13:40:47 +00:00
joergoster
8de29390f2 Pass endgame value to evaluate_scale_factor() 
No functional change

Resolves #592
 2016-02-28 13:35:34 +00:00
VoyagerOne
45a309d92e Simplify Reduction Formula 
Formula now only contains one coefficient. Making it much easier to tune.

STC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 187443 W: 34858 L: 35028 D: 117557

LTC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 88329 W: 11982 L: 11953 D: 64394

Bench: 7521394

Resolves #591
 2016-02-28 13:31:25 +00:00
Leonid Pechenik
d5ba8e827d Revert "Remove slowMover" 
This reverts commit 77fa960f89.

Resolves #590
 2016-02-28 13:25:05 +00:00
IIvec
77fa960f89 Remove slowMover 
Removes a slowMover and one paramater from move_importance function.

STC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 77023 W: 14456 L: 14433 D: 48134

LTC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 37175 W: 5190 L: 5092 D: 26893

Resolves #589
 2016-02-21 20:16:28 +00:00
VoyagerOne
bfe9044ad9 History Stat Formula Simplification 
STC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 67476 W: 12561 L: 12521 D: 42394

LTC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 111923 W: 15147 L: 15149 D: 81627

Bench: 8430465

Resolves #588
 2016-02-21 20:12:33 +00:00
VoyagerOne
744ed85a4d Fix futility pruning bug 
PredictedDepth can be negative, causing the futility_margin to be negative.
It will be very difficult to tweak moveCount pruning and reduction formula, as they are tuned to prevent this behavior.

No functional change

Resolves #587
 2016-02-14 19:48:46 +00:00
hxim
56dd58e6f9 Remove Weights 
Removed remaining redundant weights for pawn structure,
passed pawns, space and king safety by redistributing them
into individual evaluation terms.

STC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 15173 W: 2790 L: 2659 D: 9724

LTC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 43433 W: 5936 L: 5846 D: 31651

Bench: 7156237

Resolves #586
 2016-02-07 21:00:24 +00:00
Marco Costalba
4f6aa15228 Document HalfDensityMap 
No functional change.

Resolves #584
 2016-02-07 20:54:25 +00:00
Leonid Pechenik
aedebe35cf Time management simplification 
10+0.1:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 41963 W: 7967 L: 7883 D: 26113

60+0.6:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 132314 W: 17939 L: 17969 D: 96406

Resolves #580
 2016-01-29 00:47:07 +00:00
Guenther Demetz
9a10313a9d rotating symmetric patterns with increasing skipsize 
STC:
LLR: 2.95 (-2.94,2.94) [0.00,5.00] sprt @ 5+0.1 th 21
Total: 7068 W: 1121 L: 975 D: 4972

LTC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00] sprt @ 12+0.12 th 21
Total: 26691 W: 3594 L: 3481 D: 19616

No functional change with a single thread

Resolves #574
 2016-01-24 14:08:01 +00:00
Joona Kiiski
8c3a5bbc52 Do not probe syzygy bases when castling is possible 
Almost no functional change. Bench is unchanged.

Resolves #230
Resolves #573
 2016-01-20 15:24:21 +00:00
lucasart
28933a580e Retire RootNode template 
There is no reason to compile 3 different copies of search(). PV nodes are on
the cold path, and PvNode is a template parameter, so there is no cost in
computing:

const bool RootNode = PvNode && (ss-1)->ply == 0;

And this simplifies code a tiny bit as well.

Speed impact is negligible on my machine (i7-3770k, linux 4.2, gcc 5.2):

            nps   +/-
test    2378605  3118
master  2383128  2793
diff      -4523  2746

Bench: 7751425

No functional change.

Resolves #568
 2016-01-18 22:21:42 +00:00
Guenther Demetz
12eb345ebd Depth margin parameter-tweak in TT-save 
Verified that is improvement with multiple threads:

LLR: 2.95 (-2.94,2.94) [0.00,4.00] sprt @ 30+0.3 th 3
Total: 14817 W: 2103 L: 1915 D: 10799

LLR: 2.96 (-2.94,2.94) [0.00,4.00] sprt @ 15+0.15 th 7
Total: 10264 W: 1498 L: 1321 D: 7445

Verified that is not a significant regression with a single thread:

LLR: 2.96 (-2.94,2.94) [-4.00,0.00] sprt @ 60+0.6 th 1
Total: 23975 W: 3294 L: 3210 D: 17471

Resolves #575
 2016-01-18 22:04:38 +00:00
Joona Kiiski
ebec2fa48e Remove redundant -std=c++0x flag 
This flag is functionally identical to '-std=c++11' flag which
is part of standard flags.

No functional change

Resolves #571
 2016-01-18 21:54:40 +00:00
Joona Kiiski
552b3ccb66 Makefile: Allow specifying compiler executable 
No functional change

Resolves #570
 2016-01-18 21:47:52 +00:00
Marco Costalba
356147d99a Rewrite time formula 
Time management is really too complex, our aim is
to simplify it, but for time being at least rewrite
in an understandable way.

No functional change.
 2016-01-18 17:12:18 +01:00
Lyudmil Antonov
89723339d9 Assorted English grammar changes 
No functional change

Resolves #567
 2016-01-16 21:34:29 +00:00
Stefano80
74e2fa97b7 Adjust reductions based on history and cmh tables 
STC:
LLR: 4.06 (-2.94,2.94) [0.00,5.00]
Total: 149395 W: 28029 L: 27208 D: 94158

LTC:
LLR: 2.96 (-2.94,2.94) [0.00,5.00]
Total: 9628 W: 1368 L: 1217 D: 7043

bench: 8076724

Resolves #565
 2016-01-13 16:18:35 +00:00
Stefano80
dcd8ce7094 Update comments in LMR step 
No functional change

Resolves #564
 2016-01-13 16:03:53 +00:00
Leonid Pechenik
4d1220d672 Tune time management for LTC 
60+0.6:
LLR: 2.96 (-2.94,2.94) [0.00,4.00]
Total: 102533 W: 14270 L: 13842 D: 74421

Resolves #558
 2016-01-09 09:21:52 +00:00
lucasart
aa31f7f096 Retire CenterBind 
And compensate in the PSQT.

STC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 27714 W: 5161 L: 5052 D: 17501

LTC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 36354 W: 5008 L: 4909 D: 26437

Bench: 8603285

Resolves #556
 2016-01-03 17:33:36 +00:00
Alain SAVARD
1de97337c2 Fine tuning of unsupported pawn penalty 
Adjust the unsupported pawn penalty when the pawn is supporting 2 pawns
(for example g7 in f6-g7-h6)

Passed STC
LLR: 2.96 (-2.94,2.94) [0.00,5.00]
Total: 23833 W: 4384 L: 4158 D: 15291

Passed LTC
LLR: 2.96 (-2.94,2.94) [0.00,5.00]
Total: 42711 W: 5918 L: 5655 D: 31138

Bench: 8390233

Resolves #549
 2016-01-03 14:15:29 +00:00
Leonid Pechenik
9eceb894ac Adjust time used for move based on previous score 
Use less time if evaluation is not worse than for previous move and even less time if in addition no fail low encountered for current iteration.

STC: 10+0.1
ELO: 5.37 +-2.9 (95%) LOS: 100.0%
Total: 20000 W: 3832 L: 3523 D: 12645

STC: 10+0.1
LLR: 2.96 (-2.94,2.94) [0.00,5.00]
Total: 17527 W: 3334 L: 3132 D: 11061

LTC: 60+0.6
LLR: 2.95 (-2.94,2.94) [0.00,5.00]
Total: 28233 W: 3939 L: 3725 D: 20569

LTC: 60+0.6
ELO: 2.43 +-1.4 (95%) LOS: 100.0%
Total: 60000 W: 8266 L: 7847 D: 43887

LTC: 60+0.06
LLR: 2.95 (-2.94,2.94) [-1.00,3.00]
Total: 38932 W: 5408 L: 5207 D: 28317

Resolves #547
 2016-01-03 14:01:15 +00:00
Joona Kiiski
5972c4a678 Restore development version 2016-01-03 13:52:01 +00:00
Joona Kiiski
dd9cf30581 Stockfish 7 
Bench: 8355485

No functional change
 2016-01-02 20:26:02 +00:00
ppigazzini
d4af15f682 Update AUTHORS and copyright notice 
No functional change

Resolves #555
 2016-01-02 09:43:51 +00:00
Marco Costalba
9742fb10fd Update Copyright year 
No functional change.

Resolves #554
 2016-01-01 10:17:36 +00:00
Joona Kiiski
7cafbab529 Stockfish 7 Beta 2 
Bench: 8355485

No functional change
 2015-12-30 11:32:45 +00:00
Alain SAVARD
6a79d5d10e Correct Pawn Trace Score + Code Clean up 
No functional change

Resolves #542
 2015-12-30 11:30:28 +00:00
Marco Costalba
3e4fed3a91 Fix assert with very high score position 
In case of a very high material score, we can
overflow VALUE_INFINITE.

This patch fixes an assert with:

position fen 7k/QQQQR3/2B5/4KN1Q/3QQ3/8/8/4R3 b - - 0 1
go depth 1

No functional change.

Resolves #546
 2015-12-30 11:16:48 +00:00
Joona Kiiski
a5c76d69c3 Stockfish 7 Beta 1 
Bench: 8355485

No functional change
 2015-12-27 19:36:56 +00:00
Marco Costalba
1b5b900a29 Move some globals into main thread scope 
Make it explicit that those variables are not globals, but
are used only by main thread. I think it is a sensible
clarification because easy move is already tricky enough
and current patch makes the involved actors explicit.

No functional change.

Resolves #537
 2015-12-27 19:29:16 +00:00
Marco Costalba
90f5937373 Revert "Fix compiling of 32 bit binary on 64-bit Windows" 
This reverts commit 1e8836d921

Broken compile on mingw under Windows:

Config:
debug: 'yes'
optimize: 'yes'
arch: 'i386'
bits: '32'
prefetch: 'yes'
bsfq: 'no'
popcnt: 'no'
sse: 'yes'
pext: 'no'

Flags:
CXX: i686-w64-mingw32-c++
CXXFLAGS: -Wall -Wcast-qual -fno-exceptions -fno-rtti -std=c++11  -Wextra -Wshadow -g -O3 -msse
LDFLAGS:  -static

Testing config sanity. If this fails, try 'make help' ...

mingw32-make[1]: Leaving directory 'C:/stockfish/src'
c:/MinGw/bin/mingw32-make ARCH=x86-32 COMP=mingw all
mingw32-make[1]: Entering directory 'C:/stockfish/src'
sh: C:\Program: No such file or directory
i686-w64-mingw32-c++ -Wall -Wcast-qual -fno-exceptions -fno-rtti -std=c++11  -Wextra -Wshadow -g -O3 -msse   -c -o benchmark.o benchmark.cpp
<builtin>: recipe for target 'benchmark.o' failed
process_begin: CreateProcess(NULL, i686-w64-mingw32-c++ -Wall -Wcast-qual -fno-exceptions -fno-rtti -std=c++11 -Wextra -Wshadow -g -O3 -msse -c -o benchmark.o benchmark.cpp, ...) failed.
make (e=2): Impossibile trovare il file specificato.

mingw32-make[1]: *** [benchmark.o] Error 2
mingw32-make[1]: Leaving directory 'C:/stockfish/src'
makefile:401: recipe for target 'build' failed
mingw32-make: *** [build] Error 2

No functional change.
 2015-12-23 09:41:56 +01:00
braich
1e8836d921 Fix compiling of 32 bit binary on 64-bit Windows 
Two versions of mingw-w64 (targeting Win64 and Win32)
can be installed on Windows too.

No functional change

Resolves #532
 2015-12-22 19:07:10 +00:00
DU-jdto
e3c85c314d Remove another unnecessary Search::Stack field 
No functional change

Resolves #535
 2015-12-22 17:16:15 +00:00
Alain SAVARD
da34023cfc New mobility bonus 
Tuned the global mobility factor for each piece, as well as some +- delta,

The master mobility factor was {266,334} and tuning gave
{267, 362} +S(-2,-2) for the Knight
{249, 328} +S( 0,-2) for the Bishop
{298, 353} +S(1,1) for the Rook
{265, 358} +S(2,-1) for the Queen

Passed STC
LLR: 2.95 (-2.94,2.94) [0.00,4.00]
Total: 49402 W: 9367 L: 9037 D: 30998

and LTC
LLR: 2.97 (-2.94,2.94) [0.00,5.00]
Total: 26831 W: 3871 L: 3658 D: 19302

Bench: 8355485

Resolves #536
 2015-12-22 10:02:37 +00:00
VoyagerOne
ed72a1e9ba Remove killer move conditions from LMR 
STC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 8459 W: 1619 L: 1477 D: 5363

LTC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 32239 W: 4404 L: 4299 D: 23536

Bench: 7597031

Resolves #534
 2015-12-20 20:41:17 +00:00
loco-loco
5bbd944099 Remove unused field SearchStack::ttMove 
No functional change

Resolves #533
 2015-12-20 20:37:18 +00:00
Guenther Demetz
38adb487ca Distinct iteration paths for Lazy SMP threads 
STC 5+0.1, threads 7
LLR: 2.96 (-2.94,2.94) [0.00,5.00]
Total: 6026 W: 1047 L: 901 D: 4078

LTC: 20+0.2, threads 7
LLR: 2.95 (-2.94,2.94) [0.00,5.00]
Total: 19739 W: 2910 L: 2721 D: 14108

STC 5+0.1, threads 20
LLR: 2.95 (-2.94,2.94) [0.00,5.00]
Total: 2493 W: 462 L: 331 D: 1700

LTC 30+0.3, threads 20
ELO: 8.86 +-3.7 (95%) LOS: 100.0%
Total: 8000 W: 1076 L: 872 D: 6052

Bench: 8012530

Resolves #525
 2015-12-18 21:59:09 +00:00
mstembera
2c1797ab81 Fix easy move bug in SMP mode 
Fix a bug where we could stop the search after only 10% of time used due to a matching easy move but later switch to a different move that was never pre-screened as easy due to SMP thread select.

STC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 27227 W: 4910 L: 4800 D: 17517

LTC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 40368 W: 5826 L: 5733 D: 28809

Resolves #521
 2015-12-14 18:47:12 +00:00
Alain SAVARD
9fac5774f4 Threats retuned 
STC:

LLR: 2.96 (-2.94,2.94) [0.00,4.00]
Total: 45239 W: 8913 L: 8591 D: 27735

LTC:

LLR: 2.95 (-2.94,2.94) [0.00,4.00]
Total: 21046 W: 3200 L: 2989 D: 14857

Bench: 8012530

Resolves #526
 2015-12-14 18:11:13 +00:00
Leonid Pechenik
69240a982d Simplify time management and fix 'ponder on' bug 
Simplify time management code by removing hard stops for unchanging first root moves.
Search is now stopped earlier at the end iteration if it did not have fail-lows at root.

This simplification also fixes pondering bug. Ponder flag was true by default
and cutechess-cli doesn't change it to false even though no pondering is possible.
Fix the issue by setting the default value of 'Ponder' flag to false.

10+0.1:
ELO: 3.51 +-3.0 (95%) LOS: 99.0%
Total: 20000 W: 3898 L: 3696 D: 12406

40+0.4:
ELO: 1.39 +-2.7 (95%) LOS: 84.7%
Total: 20000 W: 3104 L: 3024 D: 13872

60+0.06:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 37231 W: 5333 L: 5236 D: 26662

Stopped run at 100+1:
LLR: 1.09 (-2.94,2.94) [-3.00,1.00]
Total: 37253 W: 4862 L: 4856 D: 27535

Resolves #523
Fixes #510
 2015-12-14 18:00:52 +00:00
mstembera
7904a7d930 Fix MultiPv and Skill in SMP. 
7 threads, 5+0.1:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 55460 W: 9665 L: 9601 D: 36194

No functional change in normal playing mode
 2015-12-12 10:32:28 +00:00
absimaldata
8315620522 New Tuned Weights 
More accurate evaluation weights

Performed better at STC

LLR: 1.32 (-2.94,2.94) [0.00,4.00]
Total: 190043 W: 37433 L: 36675 D: 115935

Passed LTC

LLR: 2.95 (-2.94,2.94) [0.00,4.00]
Total: 30157 W: 4540 L: 4303 D: 21314

Bench: 9264977

Resolves #515
 2015-12-05 10:31:00 +00:00
Marco Costalba
52eac1e535 Simplify outpost code 
Also inline defintions of SpaceMask and CenterBindMask.

Verified from assembly that compiler computes the values
at compile time, so it is also theoretical faster.

While there factor out scale factor evaluation.

No functional change.
 2015-12-05 11:16:19 +01:00
mstembera
5d077bb482 Proper Makefile for cross compiling 64 or 32 bit PGO + LTO + static Windows binaries under Linux. 
No functional change

Resolves #511
 2015-12-03 14:01:38 +00:00
Stéphane Nicolet
5a42427cb8 Introduce new Threats weights = {350, 256} 
Raise the midgame threats weight by 37%.

Passed STC:
LLR: 2.95 (-2.94,2.94) [0.00,4.00]
Total: 8165 W: 1675 L: 1487 D: 5003

and LTC:
LLR: 2.95 (-2.94,2.94) [0.00,4.00]
Total: 28181 W: 4141 L: 3912 D: 20128

Bench: 7824961

Resolves #512
 2015-12-02 11:18:26 +00:00
Joona Kiiski
5339ab57d8 Revert "Allow cross compilation of Windows binaries on a Linux system" 
This reverts commit 388630ae28.

Confuses fishtest build system
 2015-11-24 17:24:45 -08:00