Gyatso V1.5.0 Release Notes
Ratings (v1.5.0)
| CCRL 40/15 | CCRL Blitz (2'+1") |
|---|---|
| ~3360 (Est.) | ~3347 (Est.) |
Highlights & Changes
- Search & Pruning Rewrite: Refactored search featuring PVS with Aspiration Windows, Null Move Pruning (adaptive R + verification), Reverse Futility Pruning (improvement-aware), Late Move Reductions (1-ply & 2-ply continuation history + threat history + LMR jitter), Late Move Pruning (LMP), IIR, and Check Extensions.
- Multi-Threading Rewrite: Rebuilt Lazy SMP thread pool search with per-thread history tables, randomized LMR jitter and vote-based best thread selection.
- NNUE Evaluation Only: Hand-Crafted Evaluation (HCE) has been deprecated as of v1.5.0 (available in ≤v1.4.0).
- Expanded CPU Build Targets: Separate release targets for
avx512,bmi2(AVX2 + hardware PEXT/PDEP),avx2(AVX2 + Magic Bitboards), andx86-64.
Contributing
Want to contribute code or donate CPU cores for automated testing? See our CONTRIBUTING.md guide!