MagicTree 3.2 released

[vihaa]

Hi,

I am pleased to announce the public release of my UCI chess engine MagicTree 3.2, written in C++.

Download / website: https://magictree.netlify.app/

MagicTree is a 64-bit Windows UCI engine. It is a classical handcrafted-evaluation engine, with no neural network, no NNUE file, and no external evaluation file included.

The engine uses bitboards, BMI2/PEXT-based sliding attack generation, alpha-beta / PVS search, iterative deepening, transposition tables, move-ordering heuristics, pruning, and a tapered handcrafted evaluation.

Important requirement: MagicTree 3.2 requires a 64-bit Windows system with a CPU supporting BMI2/PEXT instructions. On older CPUs without BMI2/PEXT support, this build may fail to start.

Estimated strength: ~2725 blitz, this is a private-test estimate until the engine receives more external testing.

Current limitations:
- Windows x64 only
- BMI2/PEXT-capable CPU required
- No opening book included
- No Syzygy/tablebase support included
- No NNUE or neural-network file included
- Single-threaded release

I have tested the engine mainly under Windows x64 in UCI-compatible GUIs. I would be grateful for any bug reports, stability issues, GUI compatibility feedback, tournament results, or suggestions for improvement.

Looking forward to seeing how MagicTree performs in external testing.

Regards,
Vikrant

[vihaa]

Hi everyone,

I have released MagicTree 3.3, and this version is now open source. The package includes the source code and the Windows x64 executable. I estimate its elo strength to be ~2800

Website:
https://magictree.netlify.app/

Download:
https://magictree.netlify.app/downloads ... ee-3.3.zip

MagicTree is a Windows x64 UCI chess engine written in C++. It is still a classical handcrafted engine — no NNUE, no neural network, and no external eval file. It uses bitboards, BMI2/PEXT sliding attacks, alpha-beta / PVS search, iterative deepening, transposition tables, pruning, move-ordering heuristics, and tapered evaluation.

Select changes from MagicTree 3.2:
- Source code is now included
- Engine identity updated to MagicTree 3.3
- Reworked repetition and draw handling
- Improved fifty-move rule handling
- Added safer legal-move detection with Position::has_any_legal_move()
- Improved quiescence stalemate detection
- Fixed few-evasion extension handling
- Fixed singular-search excluded-move handling
- Reworked SEE implementation
- Retuned several evaluation and pawn-hash parameters

Known Limitations
- Windows x64 build (only)
- BMI2/PEXT-capable CPU required
- No opening book
- No Syzygy/tablebase support
- No NNUE or network file
- Single-threaded only
- No Multi-PV

Regards,
Vikrant