As usual, 4 compiles available, 64-bit only
- Linux SSE 2: discocheck_4.3_sse2
- Linux SSE 4.2: discocheck_4.3_sse4.2
- Windows SSE 2: discocheck_4.3_sse2.exe
- Windows SSE 4.2: discocheck_4.3_sse4.2.exe
What's new
- bugfix: pawn hash table was not working (fixing this was a major speedup, although a non functional change)
- simplify IID condition: now much less dependant on the predicted node type.
- bugfix: mate scores were adjusted when being read from the TT, but not before being written. Thanks to Marco Costalba for spotting this bug.
- only set ep-square when it can be attacked by enemy pawns.
- apply double reductions a little bit earlier at predicted Cut nodes.
- reduce max depth from 8 to 6 for move count pruning.
- rook pair penalty (redundancy).
- increase king safety penalty when the king is advanced and cannot retreat.
- improved hanging pieces asymmetric evaluation.
- do not sort predicted All nodes differently.
- improved stand pat stuff in qsearch and search, using a separate asymmetric evaluation.
- unify scoring of passed and candidate passed pawns, for better eval continuity.
- tweak passed pawns scoring.
- improved the formula of ELO levels.
- skip SEE pruning and LMP at the Root node.
- lots of code cleanup.
Based on my estimations, it should be around 2800 CCRL.
Enjoy!
Thanks