Twisted Logic 20100131x

[Edsel Apostol]

You can download it here:

http://sites.google.com/site/edapostol/home

This might be the last version for a while as I will be focusing on a new engine named Hannibal that I'm working together with Sam Hamilton.

http://en.wikipedia.org/wiki/Hannibal

[Graham Banks]

Thanks Edsel. Best wishes with Hannibal.

Cheers,
Graham.

[matejst]

Edsel,

could you tell us what is new in TL?

Wish you success with you new engine.

BS

[Edsel Apostol]

Hi Boban,

It is more tactical now compared to the last version, it is not that prone anymore to miss some obscure and deep lines. This means less likely to lose against lower rated opponents due to tactics.

There are a lot of minor changes in the search and the eval.

For the search:
I did replace my old pruning technique with a more conventional one.
I disabled Extended Speculation which makes it a little conservative in its reductions (LMR related).
Some improvements on the hashing cutoffs
Some improvements on the qsearch pruning stuff
Lots of minor bugfixes

For the eval:
Disabled pawn storm when not castled on opposite sides
Removed space scoring and replaced with piece attacks
Add some limiting factors to the mobility
Lots of minor bugfixes

[matejst]

Thanks!

I will test it in Nunn's matches, and pm you my results and the games if you want. Will be finished in a week or so.

BS

[Damir]

Hi Edsel

Does Twisted Logic support MP. I am playing with it right now, and it only shows 1 CPU... ?
If not MP, do you plan on implementing MP support?

Best Regards
________
Damir D

[swami]

Thanks, Edsel.

Twisted Logic 20100131x
by Edsel Apostol, Philippines.

Strategic Test Suite Conditions:

Core2Quad 32 bits, Q6600, 2 GB RAM, 2.4GHZ
10 seconds per position
900 positions
Engine uses 128 Mb Hash.
Gradual Test by Odd Gunnar Malin


Overall Performance:

• Total Score: 648/900 [.....] Average : 72.00% [.....] Grade: A- [.....] Total Rated Time: 53.05/150 minutes

Subject-wise Scores:

STS (v1.0) - Undermining:
82/100, Grade: A+

STS (v2.1) - Open Files and Diagonals:
81/100, Grade: A+

STS (v3.0) - Knight Outposts/Centralization/Repositioning:
74/100, Grade: A-

STS (v4.1) - Square Vacancy:
73/100, Grade: A-

STS (v5.0) - Bishop vs Knight:
71/100, Grade: A-

STS (v6.0) - Re-Capturing:
82/100, Grade: A+

STS (v7.0) - Offer of Simplification:
64/100, Grade: B

STS (v8.1) - Advancement of f/g/h Pawns:
60 /100, Grade: B

STS (v9.0) - Advancement of a/b/c Pawns:
61/100, Grade: B

Regards,
Swami

[Damir]

Hi Boban,

It is more tactical now compared to the last version, it is not that prone anymore to miss some obscure and deep lines. This means less likely to lose against lower rated opponents due to tactics.

There are a lot of minor changes in the search and the eval.

For the search:
I did replace my old pruning technique with a more conventional one.
I disabled Extended Speculation which makes it a little conservative in its reductions (LMR related).
Some improvements on the hashing cutoffs
Some improvements on the qsearch pruning stuff
Lots of minor bugfixes

For the eval:
Disabled pawn storm when not castled on opposite sides
Removed space scoring and replaced with piece attacks
Add some limiting factors to the mobility
Lots of minor bugfixes

Do you also plan to implement MP support&tablebases support?...
I find this version very strong, and it would be really great if it can support these things, before you start working on Hannibal ( Barca )

[Edsel Apostol]

Hi Edsel

Does Twisted Logic support MP. I am playing with it right now, and it only shows 1 CPU... ?
If not MP, do you plan on implementing MP support?

Best Regards
________
Damir D

Hi Damir,

It doesn't have SMP yet. Yes, we do have plans to implement SMP but not in Twisted Logic. I will be working now with Hannibal and our first priority is SMP.

[Edsel Apostol]

Hi Boban,

It is more tactical now compared to the last version, it is not that prone anymore to miss some obscure and deep lines. This means less likely to lose against lower rated opponents due to tactics.

There are a lot of minor changes in the search and the eval.

For the search:
I did replace my old pruning technique with a more conventional one.
I disabled Extended Speculation which makes it a little conservative in its reductions (LMR related).
Some improvements on the hashing cutoffs
Some improvements on the qsearch pruning stuff
Lots of minor bugfixes

For the eval:
Disabled pawn storm when not castled on opposite sides
Removed space scoring and replaced with piece attacks
Add some limiting factors to the mobility
Lots of minor bugfixes

Do you also plan to implement MP support&tablebases support?...
I find this version very strong, and it would be really great if it can support these things, before you start working on Hannibal ( Barca )

This might be the last version of Twisted Logic. Hannibal now is my main priority and it is already a little stronger than TL. Our priority for now is SMP. I think we will not be needing tablebases in Hannibal as it has a good endgame knowledge already.