New features
- Increased the maximum hash size to 64GB
Improvements
- Lazy SMP bug fixes
- Probcut
- SEE based pruning in the main search
- Order captures based on MVV/LVA instead of SEE
- Minor tweaks to razoring and check extensions
- Evaluation of knight outposts
- Evaluation of candidate passed pawns
New features
- Support for the 'Threads' UCI option
- Support for the 'cores' Xboard command
- Added the 'NUM_THREADS' config file option
- Support tuner program on Windows
Improvements
- Lazy SMP
- Evaluation of king pressure
- Various small evaluation tweaks
- Enable GCC link time optimizations
- Performance optimizations for tuner program
New features
- Support for the UCI 'Clear Hash' command
Improvemets
- Late Move Pruning
- Nullmove reduction based on depth
- Lots of smaller evaluation tweaks
- Optimized implementation of transposition tables
- Various cleanup and bugfixes
New features
- Support for Syzygy tablebases
- Support for the Xboard 'egtpath' command
- Support for the Xboard 'memory' command
- Support for the UCI 'SyzygyPath' command
- SYZYGY_PATH ini-file option
Improvemets
- PVS search
- Reverse futility pruning
- Separate evaluation of mobility for midgame and endgame
- Various cleanup and bugfixes
New features
- Pondering support
- Polyglot opening book support
Improvements
- Late Move Reductions (LMR)
- Futility pruning
- Razoring
- SEE based move ordering
- Automated tuning of evaluation parameters using Texel method