Stockfish

on Thu Nov 07, 2013 11:57 am by · on Thu Nov 07, 2013 11:57 am by

@goliat72 wrote:

@prapqi wrote:Stockfish 28-10-2013 64bit whoo can send me a link for stockfish direct dowenload please Stockfish 28-10-2013 64bit

http://abrok.eu/stockfish/

And where to download Stockfish! thumb up

http://stockfishchess.org/download

A.R.B

on Fri Nov 08, 2013 4:45 am by · on Fri Nov 08, 2013 4:45 am by

Stockfish (7-11-2013)

Windows x64 for modern computers + sse4.2
Windows x64 for modern computers
Windows x64
Windows 32
Linux x64 for modern computers + sse4.2
Linux x64 for modern computers
Linux x64

changelog:
https://github.com/mcostalba/Stockfish/commits/master

Revert "Retire eval margin and gains"

This reverts commit ecd07e51d0f03ccd3e41e5634518b299989254dd.

Patch was incorrect and partial. It will be reapplied in
the correct form.

Restrict mobility of pinned pieces

Passed both short TC:
LLR: 3.00 (-2.94,2.94) [-1.50,4.50]
Total: 54342 W: 10950 L: 10692 D: 32700

And long TC:
LLR: 2.95 (-2.94,2.94) [0.00,6.00]
Total: 61976 W: 10654 L: 10251 D: 41071

Retire eval margin and gains

1/ eval margin and gains removed:
- gains removed by Value(128): search() and qsearch() now behave consistently!

2/ futility_margin()
- testing showed that there is no added value in this weird (log(depth), movecount)
formula, and a much simpler linear formula is just as good. In fact, it is most
likely better, as it is not yet optimally tuned.
- the new simplified formula also means we get rid of FutilityMargins[], its
initialization code, and more importantly ss->futilityMoveCount, and the hacky
code that updates it throughout the search().
- the current formula gives negative futility margins, and there is a hidden interaction
between the move coutn pruning formula and the futility margin one: what happens is
that MCP is supposed to be triggered before we use the non-sensical negative futility
margins.

3/ unify pre & post futility pruning
- pre futility pruning (what SF calls value based pruning) used depth < 7 plies,
while post futility pruning (what SF calls static null move pruning) used depth < 4 plies.
- also the condition depth < 7 in pre futility pruning was not obvious, and it seemd
to be depth < 16 (futility_margin() returns an infinite value when depth >= 7).

Tested with fixed number of games both at short TC:
ELO: 0.82 +-2.1 (95%) LOS: 77.3%
Total: 40000 W: 7939 L: 7845 D: 24216

And long TC
ELO: 0.59 +-2.0 (95%) LOS: 71.9%
Total: 40000 W: 6876 L: 6808 D: 26316

on Sat Nov 09, 2013 10:15 am by · on Sat Nov 09, 2013 10:15 am by

Stockfish (9-11-2013)

Windows x64 for modern computers + sse4.2
Windows x64 for modern computers
Windows x64
Windows 32
Linux x64 for modern computers + sse4.2
Linux x64 for modern computers
Linux x64

changelog:
https://github.com/mcostalba/Stockfish/commits/master

Futility pruning simplification

1/ eval margin and gains removed:
16bit are now free on TT entries, due to the removal of eval margin. may be useful
in the future :) gains removed: use instead by Value(128). search() and qsearch()
are now consistent in this regard.

2/ futility_margin()
linear formula instead of complex (log(depth), movecount) formula.

3/ unify pre & post futility pruning
pre futility pruning used depth < 7 plies, while post futility pruning used
depth < 4 plies. Now it's always depth < 7.

Tested with fixed number of games both at short TC:
ELO: 0.82 +-2.1 (95%) LOS: 77.3%
Total: 40000 W: 7939 L: 7845 D: 24216

And long TC
ELO: 0.59 +-2.0 (95%) LOS: 71.9%
Total: 40000 W: 6876 L: 6808 D: 26316

on Sat Nov 09, 2013 9:45 pm by · on Sat Nov 09, 2013 9:45 pm by

09-11-13 Stockfish dev

Code:: ELO: 60.63 +-3.1 (95%) LOS: 100.0% Total: 18807 W: 5309 L: 2060 D: 11438

60 elo better than Stockfish 4 thumb up

http://tests.stockfishchess.org/tests

on Sun Nov 10, 2013 9:11 am by · on Sun Nov 10, 2013 9:11 am by

Date: Sun Nov 10 09:48:49 2013 +0100
Timestamp: 1384073329

Remove RedundantMajor

about +63 elo up from SF4

a new release with elo boost thumb up

on Sun Nov 10, 2013 11:33 am by · on Sun Nov 10, 2013 11:33 am by

Date: Sun Nov 10 12:05:19 2013 +0100
Timestamp: 1384081519

Simplify squares_aligned()

Use newly introduced LineBB[]

***

and

Date: Sun Nov 10 11:52:38 2013 +0100
Timestamp: 1384080758

Evaluate mobility of pinned pieces exactly

Previously some squares could be "incorrectly" awarded
to a pinned piece.

e.g. in 3k4/1q6/3b4/3Q4/8/5K2/B7/8 b - - 0 1 the black
bishop get 4 squares too many and the white queen gets 6.

Passed both short TC.
LLR: 2.97 (-2.94,2.94) [-1.50,4.50]
Total: 4871 W: 934 L: 817 D: 3120

And long TC:
LLR: 2.96 (-2.94,2.94) [0.00,6.00]
Total: 38968 W: 6113 L: 5837 D: 27018

I predict the newest elo info is that
the elo boost from stockfish 4 will be +70 or so
since this version update is a major one
in terms of elo power

we can usually quite accurately extrapolate
how much elo gain there is
by looking at the win/loss numbers
and I think the elo gained is huge (like 10 elo)
not just 1 or 2 elo points

And long TC:
LLR: 2.96 (-2.94,2.94) [0.00,6.00]
Total: 38968 W: 6113 L: 5837 D: 27018

W: 6113
L: 5837

on Sun Nov 10, 2013 11:58 am by · on Sun Nov 10, 2013 11:58 am by

@thorhammer wrote:
Date: Sun Nov 10 12:05:19 2013 +0100
Timestamp: 1384081519

Simplify squares_aligned()

Use newly introduced LineBB[]

***

and

Date: Sun Nov 10 11:52:38 2013 +0100
Timestamp: 1384080758

Evaluate mobility of pinned pieces exactly

Previously some squares could be "incorrectly" awarded
to a pinned piece.

e.g. in 3k4/1q6/3b4/3Q4/8/5K2/B7/8 b - - 0 1 the black
bishop get 4 squares too many and the white queen gets 6.

Passed both short TC.
LLR: 2.97 (-2.94,2.94) [-1.50,4.50]
Total: 4871 W: 934 L: 817 D: 3120

And long TC:
LLR: 2.96 (-2.94,2.94) [0.00,6.00]
Total: 38968 W: 6113 L: 5837 D: 27018

I predict the newest elo info is that
the elo boost from stockfish 4 will be +70 or so
since this version update is a major one
in terms of elo power

we can usually quite accurately extrapolate
how much elo gain there is
by looking at the win/loss numbers
and I think the elo gained is huge (like 10 elo)
not just 1 or 2 elo points

And long TC:
LLR: 2.96 (-2.94,2.94) [0.00,6.00]
Total: 38968 W: 6113 L: 5837 D: 27018

W: 6113
L: 5837

Seems like Ronald stopped to update this new dev versions of SF for Syzygy since SF started stage 4 os TCEC without using Syz TB´s... confused

on Sun Nov 10, 2013 12:27 pm by · on Sun Nov 10, 2013 12:27 pm by

What should i do to add C:\sbases345 to this version or others to come, using fritz 13 gui? I have created Stockfich as a uci engine. Also could u tell me how to tune up the parameters to optimize the engine for i7?
Thank u very much.

Jack Sparrow wrote:Stockfish (9-11-2013)

Windows x64 for modern computers + sse4.2
Windows x64 for modern computers
Windows x64
Windows 32
Linux x64 for modern computers + sse4.2
Linux x64 for modern computers
Linux x64

changelog:
https://github.com/mcostalba/Stockfish/commits/master

Futility pruning simplification

1/ eval margin and gains removed:
16bit are now free on TT entries, due to the removal of eval margin. may be useful
in the future :) gains removed: use instead by Value(128). search() and qsearch()
are now consistent in this regard.

2/ futility_margin()
linear formula instead of complex (log(depth), movecount) formula.

3/ unify pre & post futility pruning
pre futility pruning used depth < 7 plies, while post futility pruning used
depth < 4 plies. Now it's always depth < 7.

Tested with fixed number of games both at short TC:
ELO: 0.82 +-2.1 (95%) LOS: 77.3%
Total: 40000 W: 7939 L: 7845 D: 24216

And long TC
ELO: 0.59 +-2.0 (95%) LOS: 71.9%
Total: 40000 W: 6876 L: 6808 D: 26316

on Mon Nov 11, 2013 9:07 am by · on Mon Nov 11, 2013 9:07 am by

@Solvang wrote:What should i do to add C:\sbases345 to this version or others to come, using fritz 13 gui? I have created Stockfich as a uci engine. Also could u tell me how to tune up the parameters to optimize the engine for i7?
Thank u very much.

Try this one: Windows x64 for modern computers + sse4.2 Stockfish with Syzygy Bases support.

on Mon Nov 11, 2013 9:09 am by · on Mon Nov 11, 2013 9:09 am by

Stockfish (11-11-2013)

Windows x64 for modern computers + sse4.2
Windows x64 for modern computers
Windows x64
Windows 32
Linux x64 for modern computers + sse4.2
Linux x64 for modern computers
Linux x64

changelog:
https://github.com/mcostalba/Stockfish/commits/master

Reintroduce gains

This seems a die hard idea :-)

Passed both short TC
LLR: 2.97 (-2.94,2.94) [-1.50,4.50]
Total: 17485 W: 3307 L: 3156 D: 11022

And long TC
LLR: 2.97 (-2.94,2.94) [0.00,6.00]
Total: 38181 W: 6002 L: 5729 D: 26450

on Mon Nov 11, 2013 9:45 am by · on Mon Nov 11, 2013 9:45 am by

Author: Marco Costalba
Date: Sun Nov 10 17:21:59 2013 +0100
Timestamp: 1384100519

Remove opposed flag for doubled pawns

Actually, it is not used, as both arrays have the
same values. Some local tests in either direction
showed no improvement.

Also some minor corrections in the comments.

Author: Jörg Oster
Date: Sun Nov 10 17:21:59 2013 +0100
Timestamp: 1384100519

Remove opposed flag for doubled pawns

Actually, it is not used, as both arrays have the
same values. Some local tests in either direction
showed no improvement.

Also some minor corrections in the comments.

No functional change.

Author: Marco Costalba
Date: Sun Nov 10 12:05:19 2013 +0100
Timestamp: 1384081519

Simplify squares_aligned()

Use newly introduced LineBB[]

Author: Chris Caino
Date: Sun Nov 10 11:52:38 2013 +0100
Timestamp: 1384080758

Evaluate mobility of pinned pieces exactly

Previously some squares could be "incorrectly" awarded
to a pinned piece.

e.g. in 3k4/1q6/3b4/3Q4/8/5K2/B7/8 b - - 0 1 the black
bishop get 4 squares too many and the white queen gets 6.

Passed both short TC.
LLR: 2.97 (-2.94,2.94) [-1.50,4.50]
Total: 4871 W: 934 L: 817 D: 3120

And long TC:
LLR: 2.96 (-2.94,2.94) [0.00,6.00]
Total: 38968 W: 6113 L: 5837 D: 27018

bench: 9282549

Author: Chris Caino
Date: Sun Nov 10 09:48:49 2013 +0100
Timestamp: 1384073329

Remove RedundantMajor

But compensate by reducing rook and queen
value by 53 = (160 / 3)

Material imbalances are affected as follows:

Red. Major Rook Queen Total
QRR +160 -2*53 -53 +1
QR +160 -53 -53 +54
RR +160 -2*53 0 +54
R 0 -53 0 -53
Q 0 0 -53 -53

so that the imbalance changes by at most 54 + 53 = 107 units.
This corresponds to appromximately 3.5cp in the final evaluation.

Verified with fixed number 40000 games at both short
and long TC it does not regress.

Short TC 15+0.05
ELO: 1.93 +-2.1 (95%) LOS: 96.6%
Total: 40000 W: 7520 L: 7298 D: 25182

Long TC 60+0.05
ELO: -0.33 +-1.9 (95%) LOS: 36.5%
Total: 39663 W: 6067 L: 6105 D: 27491

bench: 6703846

on Mon Nov 11, 2013 12:11 pm by · on Mon Nov 11, 2013 12:11 pm by

Dear Jack: thanks a lot; i will try this one; by the way, are the default parameters optimized for i7???
My kindest regards .
Bernard.

Jack Sparrow wrote:

@Solvang wrote:What should i do to add C:\sbases345 to this version or others to come, using fritz 13 gui? I have created Stockfich as a uci engine. Also could u tell me how to tune up the parameters to optimize the engine for i7?
Thank u very much.

Try this one: Windows x64 for modern computers + sse4.2 Stockfish with Syzygy Bases support.

on Mon Nov 11, 2013 10:10 pm by · on Mon Nov 11, 2013 10:10 pm by

come with Syzygy Bases support ?????
Thx

Jack Sparrow wrote:Stockfish (11-11-2013)

Windows x64 for modern computers + sse4.2
Windows x64 for modern computers
Windows x64
Windows 32
Linux x64 for modern computers + sse4.2
Linux x64 for modern computers
Linux x64

changelog:
https://github.com/mcostalba/Stockfish/commits/master

Reintroduce gains

This seems a die hard idea :-)

Passed both short TC
LLR: 2.97 (-2.94,2.94) [-1.50,4.50]
Total: 17485 W: 3307 L: 3156 D: 11022

And long TC
LLR: 2.97 (-2.94,2.94) [0.00,6.00]
Total: 38181 W: 6002 L: 5729 D: 26450

on Tue Nov 12, 2013 5:10 am by · on Tue Nov 12, 2013 5:10 am by

[pgn][Event "nTCEC - Stage 4 - Season 2"]
[Site "http://www.tcec-chess.net"]
[Date "2013.11.12"]
[Round "11.3"]
[White "Houdini 9601"]
[Black "Stockfish 021113"]
[Result "0-1"]
[SetUp "1"]
[FEN "r1bqk2r/pp2bppp/1nnpp3/4P3/3P4/1B3N2/PP1B1PPP/RN1Q1RK1 b kq - 5 10"]

10... d5 11. Qe2 O-O 12. Na3 Bd7 13. Nc2 Nc8 14. Ne3 f6 15. exf6 gxf6 16. Rfe1
Kh8 17. g3 Nd6 18. Ng2 Ne4 19. Bc2 Nxd2 20. Qxd2 Rf7 21. a3 Bd6 22. Ba4 Qg8
23. Rac1 Re8 24. Rc3 a6 25. Rec1 Qg4 26. Bc2 Rff8 27. Rb3 Rb8 28. Bb1 Qg7
29. Re3 Qh6 30. Rce1 Rbc8 31. Qd3 Rfe8 32. Qd2 Rg8 33. Qe2 Rce8 34. Ba2 f5
35. Rb3 Bc8 36. Rc3 Ref8 37. Bb3 Bd7 38. Ba4 b5 39. Bd1 f4 40. Qc2 fxg3
41. hxg3 Qg7 42. Qd2 Bb8 43. Kh1 Rf6 44. Rd3 Rh6 45. Kg1 Bxg3 46. fxg3 Qxg3
47. b4 e5 48. dxe5 Bf5 49. Ng5 Qxg5 50. Qxg5 Rxg5 51. Rxd5 Be6 52. Rd6 Nxe5
53. Bg4 Rxg4 54. Rxe5 Rxg2 55. Kxg2 Bh3 56. Kg3 Rxd6 57. Kxh3 Rd3 58. Kg4 Kg7
59. Kf4 Rxa3 60. Re7 Kg6 61. Re6 Kh5 62. Re5 Kh4 63. Re7 h5 64. Re1 Kh3 65. Rh1
Kg2 66. Rxh5 Rb3 67. Rg5 Kf2 68. Ke4 Rxb4 69. Kd3 Kf3 70. Kc3 Re4 71. Rd5 Rc4
72. Kb2 Ke4 73. Rh5 Kd4 74. Kb3 Rc5 75. Rh6 a5 76. Rh4 Kd5 77. Rh5 Kc6 78. Rh6
Kb7 79. Rf6 Rc1 80. Rf8 a4 81. Kb4 Rb1 82. Ka3 0-1[/pgn]

on Tue Nov 12, 2013 9:46 am by · on Tue Nov 12, 2013 9:46 am by

Stockfish beat future Houdini 4 ? lolz

on Tue Nov 12, 2013 1:26 pm by · on Tue Nov 12, 2013 1:26 pm by

@Waldemar wrote:Stockfish beat future Houdini 4 ? lolz

Yes !

on Wed Nov 13, 2013 2:17 pm by · on Wed Nov 13, 2013 2:17 pm by

Stockfish with Syzygy Bases support (12-11-2013)

Windows x64 for modern computers + sse4.2
Windows x64 for modern computers
Windows x64
Windows 32
Linux x64 for modern computers + sse4.2
Linux x64 for modern computers
Linux x64

changelog:
Small modification due to changes in Stockfish.

on Thu Nov 14, 2013 2:01 am by · on Thu Nov 14, 2013 2:01 am by

https://www.dropbox.com/s/upghqh4ay1x3zbu/Stockfish_Rockwood.7z very very good

on Thu Nov 14, 2013 7:50 am by · on Thu Nov 14, 2013 7:50 am by

hello,
Is it possible to set the windows command a constant odsługę eg 8 cores

on Thu Nov 14, 2013 9:13 am by · on Thu Nov 14, 2013 9:13 am by

@yanbu1 wrote:https://www.dropbox.com/s/upghqh4ay1x3zbu/Stockfish_Rockwood.7z very very good

Hi yanbu1, thanks for the package thumb up

. What is this, a new SF dev? Is already integrated with SYZ? What are these profiled versions ? question

on Thu Nov 14, 2013 1:40 pm by · on Thu Nov 14, 2013 1:40 pm by

http://www.abrok.eu/stockfish/

on Thu Nov 14, 2013 1:40 pm by · on Thu Nov 14, 2013 1:40 pm by

http://www.abrok.eu/stockfish_syzygy/

on Sat Nov 16, 2013 1:31 pm by · on Sat Nov 16, 2013 1:31 pm by

Stockfish 4 PA GTB 002 by Jeremy Bernstein.
No changes beyond updating to the tip of the upstream master branch (as of 11 Nov 2013).
Download

on Sat Nov 16, 2013 7:35 pm by · on Sat Nov 16, 2013 7:35 pm by

Nicolas wrote:Stockfish 4 PA GTB 002 by Jeremy Bernstein.
No changes beyond updating to the tip of the upstream master branch (as of 11 Nov 2013).
Download

it is weaker than stockfish with syzyzy

on Sat Nov 16, 2013 7:44 pm by · on Sat Nov 16, 2013 7:44 pm by

how did u test it, and how many games did u play?????
Thx

@jeandis wrote:

Nicolas wrote:Stockfish 4 PA GTB 002 by Jeremy Bernstein.
No changes beyond updating to the tip of the upstream master branch (as of 11 Nov 2013).
Download

it is weaker than stockfish with syzyzy

by