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============================== My email: jotes@go2.pl



Chess engine: Bread Engine 1.1.0

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Bread Engine is a chess engine written in c++. I started working on it in 2021, and only just finished. There is still a lot of room for improvement, but the engine is quite strong (for humans, at least). It uses NNUE (efficiently updatable neural network) to evaluate positions, as well as minimax search.

Bread engine does not have a GUI built in, however it supports the uci protocol, you can therefore run it on any chess GUI.

Author: Nonlinear2

Improved UCI commands, neural network is now always embedded in the executable. Bread engine is now a single executable, that you can download and run directly.

v.1.1.0:
Bread Engine 1.1.0 is around 130 elo stronger than version 1.0.0 in short time controls, and 65 elo stronger in long time controls.

Additions:
Mate scores
Internal iterative reductions
uci information for tablebase moves
history heuristic
razoring
static exchange evaluation pruning
and... there is now a nonsense option, which makes Bread bongcloud occasionally, underpromote to bishops and knights as well as print lyrics from "never gonna give you up" during search.
Improvements/bug fixes:
switched from using float to integer scores
improved reverse futility pruning
removed late move reduction for killer moves
fixed WDL probing bug
Results of bread_engine_1.1.0 vs bread_engine_1.0.0 (10+0.1, 1t, MB, UHO_2024_8mvs_big_+115_+134.pgn):
Elo: 132.04 +/- 31.13, nElo: 182.16 +/- 38.93
LOS: 100.00 %, DrawRatio: 30.07 %, PairsRatio: 5.69
Games: 306, Wins: 167, Losses: 56, Draws: 83, Points: 208.5 (68.14 %)
Ptnml(0-2): [2, 14, 46, 53, 38]
LLR: 2.95 (-2.94, 2.94) [0.00, 10.00]
Results of bread_engine_1.1.0 vs bread_engine_1.0.0 (40+0.5, 1t, MB, UHO_2024_8mvs_big_+115_+134.pgn):
Elo: 64.42 +/- 23.05, nElo: 89.02 +/- 31.08
LOS: 100.00 %, DrawRatio: 42.92 %, PairsRatio: 2.51
Games: 480, Wins: 208, Losses: 120, Draws: 152, Points: 284.0 (59.17 %)
Ptnml(0-2): [9, 30, 103, 60, 38]
LLR: 2.99 (-2.94, 2.94) [0.00, 10.00]

Bread Engine 1.1.0 download


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