sunfish VS blunder

The NNUE version does but the non-NNUE version doesn't use numpy. That numpy import is for a neural network based evaluation functions. The base engine still plays at a strong human level and doesn't use numpy to do any of the heavy lifting. It does rely on itertools and collections though.

I'm currently working on a chess bot in C++. The literature and common sense tells you that faster is better, which was my main reason for choosing C++. Then I discovered Sunfish on GitHub that in around 400 lines of Python (without any low level libraries like ctypes) and it still beat me somewhat convincingly. It was definitely fast enough.

Just one file: Sunfish.py

sunfish – A Python Chess Engine in 111 lines of code

https://github.com/thomasahle/sunfish sunfish is a pretty simple one that uses piece square tables for evaluating positions. Wouldn’t be too difficult to change or even tune

It's from 1990. My father passed it down to me. It works... Uhmm.. idk. There's a proprietary chess engine built in. It says it's around 1700 elo points strong. I am a big noob when it comes to chess engines but if you're interested in learning you can check out sunfish , but (Python) programming skills are required.

Incomprehensible scheiße code. I looked around and I like this one because it has "meta-level" definition of movements and liitle bit of strategy. You could implement context-free chess games with varying rules for us congenitally lazy and dull-witted. https://github.com/thomasahle/sunfish/blob/master/sunfish.py

sunfish https://github.com/thomasahle/sunfish (sunfish is the most compact and still understandable code in my opinion)

I found Blunder to be pretty accessible.

I’m assuming you’re the same author that wrote Blunder here https://github.com/algerbrex/blunder? If so, I appreciate your work. Your engine was really helpful when I started getting into computer chess. I’m the author of https://github.com/OliveriQ/Horowitz. Haven’t had much time to work on it lately due to exams, but when I have the time I will come back to it.

Some of you might recall, but a couple of months ago now I came here to this subreddit ask if any strong players would be willing to play my chess engine I've developed from scratch, Blunder. And then a month or so after that I came back again, after improving the engine significantly, asking if I could get more strong players to test it again.

I used Golang to program it. It was a nice trade-off between design speed and execution speed. Almost Python and C had a baby. You can check out the code here if you like: https://github.com/algerbrex/blunder. Feel free to look around or do whatever.

this is awesome! Maybe you can integrate it with blunder to offer computer opponents as well?

Your code style is inconsistent/bad. For example THIS commit. Some variables start with lowercase letter. Other variables start with uppercase letter. Also there are unneeded abbreviations. For example "tm". Better if it is timeManager. Or BonusMG, pv line (not sure if it is an actual thing or if it is your abbreviation. I might be wrong in this), KPrecision... Unless it is commonly understood abbreviation then do not make stuff like this your own. It is difficult for other people to read your code and understand it. And uppercase vs lowercase inconsistency is just bad.

Some of you might remember, but a while ago I came here asking if strong players would be willing to play the chess engine I created from scratch, Blunder. And I got some great responses and feedback, so thank you again for those.

I eventually will get Blunder (my engine's name) running on a lichess bot account, but for now, the way to use Blunder would be to go here, download the zip file titled "blunder-7.2.0", unzip it, and use your favorite chess GUI to install the correct executable version for your platform. I provide Windows, macOS, and Linux builds.