New engine: paulchen332

[Philipp Lenk]

Hi everyone,

I would like to introduce to a simple UCI compatible engine I have developed and released recently.

It is open source(BSD-2-Clause) and the code and some prebuilt binaries are available on github
I have also written a small blog post about it, which you can read here, if you feel so inclined.

It is an original work, not a derivative. I have - of course - taken inspiration and ideas from the chessprogramming wiki and a multitude of open source engines, for all of which I am most grateful. Not a single line of code is copied so.

This necessarily implies the code is not the most beautiful you have ever seen and is undoubtedly riddled with a multitude of bugs, misunderstandings and inefficiencies

I nonetheless hope some of you can get a minor amount of joy out of it

Thank you very much for your attention

[Ras]

Congrats! How strong is it?

One small suggestion: it seems that your node count refers only to the additional nodes per main iteration depth. Usually, this is the total node count.

[Philipp Lenk]

Congrats! How strong is it?

Thanks I don't really know for sure. Initial, more reliable testing than my own seems to indicate >=2500 Elo

One small suggestion: it seems that your node count refers only to the additional nodes per main iteration depth. Usually, this is the total node count.

Thank you for taking a look at it already! Good suggestion, being consistent with other engines in what I report is certainly worth that minor change. I will adjust it for my next release

[connor_mcmonigle]

This necessarily implies the code is not the most beautiful you have ever seen and is undoubtedly riddled with a multitude of bugs, misunderstandings and inefficiencies

I can't speak to whether your code is riddled with "bugs, misunderstandings and inefficiencies" as you write, but it is certainly some of the most beautiful C++ I've ever seen Fantastic job and congrats on your first release!

(I particularly like your "fixed_capacity_vector". I've long wished for something similar to be introduced into the standard)

[Philipp Lenk]

I can't speak to whether your code is riddled with "bugs, misunderstandings and inefficiencies" as you write, but it is certainly some of the most beautiful C++ I've ever seen Fantastic job and congrats on your first release!

Thank you so much. That comment really made my day! (Seer is incredibly impressive work, too!)

(I particularly like your "fixed_capacity_vector". I've long wished for something similar to be introduced into the standard)

You are in luck, some wonderful person is apparently working on that
And there is - of course - a boost version as well.

Feel free to use, abuse and improve my code as you see fit. I'd be honored.

[Roland Chastain]

Hello!

When I try to build the engine (on Linux 64), I get the following error message:

Code: Select all

[roland@localhost paulchen332 (main)]$ LC_ALL=C make
g++ -Wfatal-errors -std=c++17 -Wall -pedantic -Werror -O3 -march=native -ggdb -flto -Iinclude -Idep/ptl/include -Idep/pcl/include -c src/default_search_control.cpp -o src/default_search_control.o
In file included from include/philchess/chessboard.hpp:13,
                 from include/philchess/default_search_control.hpp:4,
                 from src/default_search_control.cpp:1:
dep/ptl/include/ptl/fixed_capacity_vector.hpp: In instantiation of 'constexpr void ptl::fixed_capacity_vector<T, CAPACITY>::push_back(ptl::fixed_capacity_vector<T, CAPACITY>::const_reference) [with T = philchess::move; long unsigned int CAPACITY = 64; ptl::fixed_capacity_vector<T, CAPACITY>::const_reference = const philchess::move&; ptl::fixed_capacity_vector<T, CAPACITY>::value_type = philchess::move]':
include/philchess/default_search_control.hpp:399:36:   required from here
dep/ptl/include/ptl/fixed_capacity_vector.hpp:179:18: error: cannot call member function 'constexpr auto ptl::fixed_capacity_vector<T, CAPACITY>::size() const [with T = philchess::move; long unsigned int CAPACITY = 64]' without object
   constexpr void push_back(const_reference value) noexcept(noexcept(storage_.construct_at(size(),value))) { storage_.construct_at(size(),value); ++storage_.used;  }
                  ^~~~~~~~~
compilation terminated due to -Wfatal-errors.
make: *** [Makefile:16: src/default_search_control.o] Error 1
[roland@localhost paulchen332 (main)]$ 

[Sylwy]

A very promising chess engine. In test vs. Pharaon 3.5.1 (2603 Elo CCRL Blitz).

[Philipp Lenk]

When I try to build the engine (on Linux 64), I get the following error message:

Thanks for having a look at my engine. May I ask which gcc version you are compiling with? This looks like a manifestation of this bug, which erroneously caused class members to be inaccessible in noexcept declarations. As such I assume your version is <=8?

Here is an uglified version of the file in question that should work around the bug

A very promising chess engine. In test vs. Pharaon 3.5.1 (2603 Elo CCRL Blitz).

Thank you very much for testing. I hope it will manage to live up to your expectations

[Roland Chastain]

May I ask which gcc version you are compiling with? This looks like a manifestation of this bug, which erroneously caused class members to be inaccessible in noexcept declarations. As such I assume your version is <=8?

Thank you for your answer. Indeed, it's gcc version 8.

Code: Select all

[roland@localhost paulchen332 (main)]$ gcc --version
gcc (Mageia 8.4.0-1.mga7) 8.4.0

Here is an uglified version of the file in question that should work around the bug.

Indeed, with this version of the file I can compile the program. Thank you.

[Archimedes]

Paulchen332 needs android builds.

Paulchen332 0.1.1:
https://app.box.com/s/5ld1q8nnuiygahjtzg7wd7brndruu4su