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  Topic: Stockfish Natural TB loses heavily to Stockfish master
Bernhard Bauer

Replies: 169
Views: 22835

PostForum: Computer Chess Club: General Topics   Posted: Sun Sep 10, 2017 7:55 pm   Subject: Re: Stockfish Natural TB loses heavily to Stockfish master
Yes, I use SF for analysis.
I use my own version of SF with some mods.
MaxDepth = std::max(depth / ONE_PLY,MaxDepth);
// Step 8. Null move search with verification search  ...
  Topic: Stockfish Natural TB loses heavily to Stockfish master
Bernhard Bauer

Replies: 169
Views: 22835

PostForum: Computer Chess Club: General Topics   Posted: Sun Sep 10, 2017 4:16 pm   Subject: Re: Stockfish Natural TB loses heavily to Stockfish master
Thank you, I will try it.

Btw, testing has mostly be done with 5 piece syzyzgys.
I would expect most benefit from 6 piece syzyzgys.

Kind regards
Bernhard
  Topic: Stockfish Natural TB loses heavily to Stockfish master
Bernhard Bauer

Replies: 169
Views: 22835

PostForum: Computer Chess Club: General Topics   Posted: Sun Sep 10, 2017 2:40 pm   Subject: Re: Stockfish Natural TB loses heavily to Stockfish master
As a user I use

// Step 4a. Tablebase probe
if (!rootNode && TB::Cardinality)
{
int piecesCount = pos.count<ALL_PIECES>();

if ( piecesCount < ...
  Topic: Natural TB
Bernhard Bauer

Replies: 330
Views: 47729

PostForum: Computer Chess Club: General Topics   Posted: Sun Aug 27, 2017 5:12 pm   Subject: Re: Natural TB (take 2)
not working.
g++ -Wall -Wcast-qual -std=c++11 -march=native -mtune=native -Wextra -Wshadow -DNDEBUG -march=native -mtune=native -Ofast -fno-tracer -DIS_64BIT -march=native -march=native -mpopcnt -DU ...
  Topic: Natural TB
Bernhard Bauer

Replies: 330
Views: 47729

PostForum: Computer Chess Club: General Topics   Posted: Fri Aug 25, 2017 6:17 pm   Subject: Re: Natural TB (take 2)
I tried Ellis' aproach and it works very well.
Kind regards
Bernhard
  Topic: once labeled one of the most difficult of the world...
Bernhard Bauer

Replies: 25
Views: 2191

PostForum: Computer Chess Club: General Topics   Posted: Fri Jul 21, 2017 5:46 am   Subject: Re: once labeled one of the most difficult of the world...
In Stockfish we have in search.cpp several integers.
I have changed some of them to variables.
Here an excerpt from ucioption.cpp
void init(OptionsMap& o) {

const int MaxHashM ...
  Topic: once labeled one of the most difficult of the world...
Bernhard Bauer

Replies: 25
Views: 2191

PostForum: Computer Chess Club: General Topics   Posted: Thu Jul 20, 2017 4:52 pm   Subject: Re: once labeled one of the most difficult of the world...
My first try with my modified SF
FEN: 4K1k1/8/1p5p/1Pp3b1/8/1P3P2/P1B2P2/8 w - - 0 1

St-mod-17-07-07:
Found 510 tablebases
1/1 00:00 46 15k +1,04 a2-a4
2/2 00:00 557 139k +1 ...
  Topic: Kasparov-Deep Thought 1997 (second game)
Bernhard Bauer

Replies: 156
Views: 12316

PostForum: Computer Chess Club: General Topics   Posted: Thu Jul 20, 2017 8:42 am   Subject: Re: Kasparov-Deep Thought 1997 (second game)
In this position Kasparov resigned.
There is NO draw by repetition here.
In this point I agree with Lyudmil.
[d]1r6/5kp1/RqQb1p1p/1p1PpP2/1Pp1B3/2P4P/6P1/5K2 b - - 14 45

Kind regards
Bernhard
  Topic: Speaking of checkmate verifications...
Bernhard Bauer

Replies: 8
Views: 843

PostForum: Computer Chess Club: General Topics   Posted: Thu Jul 13, 2017 6:49 pm   Subject: Re: Speaking of checkmate verifications...
For the 3. position
[d]8/1p3N1R/1p6/bP2p1p1/rkPpP1K1/p2P2P1/P2P4/8 w - - acd 23; acs 29; bm Nxe5; c2 "#12; 00:00 @ C2/R0/K2/P1/X1;"; ce 32746; dm 11; id "yacpdb id 192778"; pm Nxe ...
  Topic: Speaking of checkmate verifications...
Bernhard Bauer

Replies: 8
Views: 843

PostForum: Computer Chess Club: General Topics   Posted: Thu Jul 13, 2017 6:40 pm   Subject: Re: Speaking of checkmate verifications...
For the second position
1r2brk1/pp3p1p/3p1Q2/2pBp3/P2nP3/2NP2P1/1qP2R1P/5RK1 w - - acd 21; acs 468; bm Nb5; c2 "#12; 00:13 @ C0/R-3/K3/P9/X38;";
[d]1r2brk1/pp3p1p/3p1Q2/2pBp3/P2nP3/2NP2P1/ ...
 
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