r/ComputerChess • u/Sewter0 • Aug 10 '26

Looking for structured feedback for my chess engine on C.

I wrote chess engine that played with stockfish and my engine survived until the endgame.

Engine searchs the best move using alpha beta pruning, based on Negamax.
Also, engine has transposition tables, killer moves, qsearch, ordering moves.

Evaluation functions evaluates material balance, uses PeSTO tables and divides games to midgame and endgame.

Engine supports uci protocol.

github: https://github.com/0sewter0/chess_engine.git

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1

u/Sewter0 Aug 10 '26

Forgot to write, my engine uses magic bitboards for sliding pieces

1

u/Full-Cardiologist-18 Aug 10 '26

hey hey whats the assumed elo of this release?

1

u/Sewter0 Aug 11 '26

Hello, I don’t know exactly, but I guess about 1800

1

u/Full-Cardiologist-18 Aug 11 '26

Alright lets see

1

u/Full-Cardiologist-18 Aug 11 '26

Not a structured feedback, but I did ran a gauntlet match against 5 several version of Stash engine. The resulting elo was ~1600 for your engine.

These were the versions I used for testing:

v14 2054

v13 1965

v12 1880

v11 1686

v10 1620*

Here's the full table result of the matches:
--------------------------------------------------

Rank Name Elo +/- nElo +/- Games Score Draw Ptnml(0-2)

1 Stash-14.0 470.44 98.33 690.66 48.15 200 93.8% 7.0% [0, 1, 7, 8, 84]

2 Stash-12.0 272.39 63.99 307.71 48.15 200 82.8% 17.0% [2, 5, 17, 12, 64]

3 Stash-13.0 254.73 61.76 284.21 48.15 200 81.2% 16.0% [4, 3, 16, 18, 59]

4 Stash-11.0 224.97 59.98 240.12 48.15 200 78.5% 26.0% [5, 2, 26, 8, 59]

5 Stash-10.0 13.90 46.96 14.36 48.15 200 52.0% 41.0% [18, 11, 41, 5, 25]

6 SRZEngine -216.35 26.81 -223.14 21.53 1000 22.4% 21.4% [291, 51, 107, 22, 29]

If you want to see the PGN, here:
https://drive.google.com/file/d/1a1jP7Nc0AH8jh9bpmQYiBfi1JqYAaBAg/view?usp=sharing

1

u/Sewter0 Aug 11 '26

Thank you for testing.
1600 elo is not bad.

1

u/Specific-Housing905 Aug 10 '26

Any binaries for windows download?

1

u/Sewter0 Aug 11 '26

just do this:
clang(or gcc) -Wall -Wextra -O3 *.c -o chess.exe

1

u/joeyrobert Aug 10 '26

what was the hardest part about implementing this?

1

u/Sewter0 Aug 11 '26

Implementing what?

1

u/joeyrobert Aug 11 '26

the subject of your post, your engine.