Devre is a strong open-source UCI compatible chess engine written in C++. While writing the engine, I got great help from chessprogramming wiki , talkchess forum,stcokfish discord ,and some open-source engines: Ethereal, Vice, Koivisto.

• Fancy magic bitboards
• legal movegen with make/unmake.

• Alpha beta search (PVS)
• Quiessence search
• Transposition table
• Iterative Depening
• Aspiration Window
• Null Move Pruning
• Mate Distance Pruning
• Late Move Reduction
• Check Extension
• Futility prunings
• SEE pruning
• Singular Extension

• Hash move
• Good Captures sorted by Capture History
• Killer moves
• countermove
• History heuristic
• Bad Captures sorted by Capture History

Devre uses a NNUE for evaluation. The Network architure is 32*768 -> (512x2) -> 1. The default net was trained with 2 billion positions from Leela data. The training code written in C/CUDA,and can be found in https://github.com/OmerFarukTutkun/CUDA-Trainer . The training resources and other useful information about NNUE can be found in stockfish discord. Thanks to Stockfish and Leela teams for publishing their training data in public.

To compile in Linux/Windows with a cpu that supports AVX2 or SSE3:

• to compile with makefile you can use one of the options: make avx2 , make sse3 , make NATIVE=0 avx2 ,make NATIVE=0 sse3