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Texel 1.05 Update

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Texel 1.05 Update

Post  R4ML4N on Tue Jan 21, 2014 7:52 am

Texel 2843 Elo Rating CCRL

Code:
http://web.comhem.se/petero2home/texel101.zip


Last edited by R4ML4N on Sat Jan 24, 2015 8:30 pm; edited 3 times in total

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Texel 1.0.3

Post  R4ML4N on Thu Oct 02, 2014 4:07 pm

Texel:-



Changes meant to improve playing strength:
- Multi-threaded (SMP) search.
- Remove moves before the last zeroing move from the repetition history list before starting search.
- Removed bogus transposition table store in Search::iterativeDeepening().
- Disable aspiration window logic when searching for a faster mate.
- Added null move verification search.
- Prefetch entries from the main transposition table.
- Bonus for candidate passed pawns.
- Skip move ordering after enough moves to trigger LMP have been searched.
- Implemented pawn storm bonus for opposite castling positions.
- Removed the Botvinnik-Markoff extension.
- More aggressive LMR.
- Added knowledge for KBpKB, KNpKB, KBpKN and KNpK endgames.
- Store endgame flag in material hash table.
- Optimized lots of evaluation function parameters.
- More consistent evaluation of different classes of pawnless endgames. KQK, KRK, KQKM, KBBK, KBNK, KQKR, KQKMM, KMMKM (M = B or N).

Other changes:
- MultiPV-support.
- Mate distance pruning.
- Evaluation correction for 7 knights vs 3 queens.
- Display engine evaluation using "info string" when starting search in analysis mode.
- Changed internal parameter handling to make it easier to switch between UCI parameters and compile-time constants.

Download:
Code:
http://dl.dropboxusercontent.com/u/89684995/texel103.7z

Enjoy your testing king

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Re: Texel 1.05 Update

Post  von46 on Thu Oct 02, 2014 10:28 pm

Texel104
Code:
http://www.mediafire.com/download/8221a4a5hvo49bt/texel104.7z
Very Happy

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Texel 1.05a8

Post  R4ML4N on Thu Oct 16, 2014 9:33 am

Texel 1.05a8 Tcec

Download:
Code:
https://app.box.com/s/288nvfiluzk3q4andb1j
Mirror:
Code:
https://mega.co.nz/#!Mk50EbqK!0kXrKna9IdscRcxDYzqbyhIDJzKLtPHAJQZf7zfV1x8

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Texel 1.05a8

Post  benmermic on Sat Oct 18, 2014 9:25 pm

This is arm platform. Can u share windows compatible version of this engine.
thanks

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Texel Version 1.05 Update

Post  R4ML4N on Sat Jan 24, 2015 8:27 pm

Texel Version 1.05:-

Peter Ă–sterlund wrote:Version 1.05 of my chess engine Texel is now available for download from
Code:
http://dl.dropboxusercontent.com/u/89684995/texel105.7z

The most notable changes are support for Gaviota and Syzygy tablebases and support for multi-threaded search on Android devices.

There are 7 executables in the download package:

texel-arm : For the armv7-a architecture. Should work on most modern Android devices.
texel32.exe : For 32-bit windows systems with SSE42 and POPCOUNT.
texel32old.exe : For 32-bit windows systems without SSE42 and POPCOUNT.
texel64 : For 64-bit linux intel systems with SSE42 and POPCOUNT.
texel64.exe : For 64-bit windows intel systems with SSE42 and POPCOUNT.
texel64amd.exe : For 64-bit windows systems with SSE42 and POPCOUNT.
texel64old.exe : For 64-bit windows systems without SSE42 and POPCOUNT.

For more Android executables, see the "Texel Chess Engine" app in Google play.

The linux executable require a fairly recent 64-bit linux distribution to run. To compile your own linux version, see the readme.txt file.

Texel 1.05 is about 57 elo stronger than Texel 1.04 on my linux computer at very fast time controls.

Changes:
- Added support for Gaviota and Syzygy tablebases.
- Improved the built in opening book.
- Implemented UCI option "Clear Hash".
- Optimization for NUMA hardware.
- Earlier transposition table prefetch.
- Added evaluation of "semi-trapped" rooks.
- Removed the guarded passed pawn evaluation.
- Don't rely on the transposition table to communicate search results from helper to master thread.
- Use more time early in sudden death and increment games.
- Smaller delta in aspiration window loop.
- Optimized history heuristic update formula.
- Improved fortress detection for bishop and pawns vs pawns.
- Detection of "16 pawn fortress positions".
- Added bonus for pieces protected by pawns.
- Fixed incorrect draw scores in multipv mode.
- Made piece square tables have left/right asymmetry.
- Detection of KQKRP fortress positions.
- Disabled LMP in PV nodes.
- Only do check extension for negative SEE moves if the remaining depth is small.
- Implemented singular extensions.
- More aggressive LMR.
- Fixed makefile to make multi-threaded search work for Android.

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Re: Texel 1.05 Update

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