"Texel" is now available for download from...
http://web.comhem.se/petero2home/texel101.zipTexel is derived from my old engine CuckooChess. In fact, Texel 1.00 was functionally equivalent to an unreleased version of CuckooChess. The main difference is that Texel is written in C++11 instead of java.
The program is licensed under GNU GPLv3. The zip archive contains source code and binaries for linux 64-bit and 32-bit (Fedora 16, untested on other distributions) and windows 64-bit and 32-bit (tested on Windows 7 64-bit and Windows Vista 32-bit.)
In theory it should be possible to compile the program on any platform that has a C++11 compiler, because the source code does not contain any platform-specific code. In practice it is still quite hard to find good C++11 compilers. I have used gcc 4.6.3 in linux and Visual Studio 2012 beta in Windows.
Changes compared to CuckooChess 1.12:
* Ported from Java to C++. About twice as fast as a result.
* Made node counters 64-bit to avoid overflow in long searches.
* Fixed handling of UCI "searchmoves" command.
* Added evaluation term to avoid walking into wrong corner in KRKB endings.
* Implemented reverse futility pruning.
* Implemented late move pruning.
* Made strength setting between 0% and 10% even weaker. 0% now plays random legal moves and 10% corresponds to the old 0% setting.
* Replaced cuckoo hashing with a more cache-friendly alternative.
* Try harder not to lose on time in really short time control games.
* Implemented passed pawn race evaluation.
* Increased passed pawn bonus for pawns on rank 6 and 7.
Texel scores about 70% (+140 elo) against CuckooChess 1.13a8 (unreleased) on my 64-bit linux computer at short time control (60 moves in 8 seconds), but I would be very surprised if the difference is that big at longer time controls against different engines.
Peter Osterlund -
peterosterlund2@gmail.comhttp://web.comhem.se/petero2homeJA builds available.
Windows/Linux/Android 64/32
Should work on all systems.
http://dl.dropbox.com/u/5047625/texel-101-ja.zipMirror:
http://cl.ly/FHyX/texel-101-ja.zip