amoeba a new UCI engine

abulmo · Post by **abulmo** » Sat May 21, 2016 12:50 am

I am pleased to announce the release of amoeba 1.0, a new and original chess engine, available here: https://github.com/abulmo/amoeba
64 bits executable are available for linux and windows. Sorry for people still using a 32bit-OS, but I failed to have a working executable. As I did all my tests under linux and I did only some very basic test for the windows version, I am pretty confident on the stability of the linux version, much less on the windows one.

The main originality of this engine, is that it is written with the D language (http://dlang.org).
The way I build the evaluation function is also pretty original, with some very simple concepts and well tuned weights.

In CCRL 4040 scale, I hope my program to reach 2650 - 2700 elo. I also hope to increase its strength in future versions.

Enjoy it

--
Richard Delorme

Graham Banks · Post by **Graham Banks** » Sat May 21, 2016 12:56 am

Looking forward to trying it out.

Thanks for sharing.

Daniel Anulliero · Post by **Daniel Anulliero** » Sat May 21, 2016 7:51 am

Good new Richard!
Now , a great chess engine , after a super othello engine

Good luck with amoeba ( origin of the name?)

Dann Corbit · Post by **Dann Corbit** » Sat May 21, 2016 7:58 am

An amorphous predatory protozoan which eats its prey by surrounding it with its body and engulfing it.

Daniel Anulliero · Post by **Daniel Anulliero** » Sat May 21, 2016 8:15 am

Dann Corbit wrote:An amorphous predatory protozoan which eats its prey by surrounding it with its body and engulfing it.

Aah yes of course it's "amibe" in french
Thanks!

cdani · Post by **cdani** » Sat May 21, 2016 11:08 am

Congratulations! Nice to see new ideas coming.

velmarin · Post by **velmarin** » Sat May 21, 2016 12:46 pm

Congrats, Richard.

I have installed in a few minutes the compiler and the extension for Visual Studio.
I have these things make me enjoy.

X 64 compiles very well and stably plays but not with itself less than half speed than your original executable.

X 32 depart popcnt instruction errors.

Code: Select all

..\src\board.d&#40;916&#41;&#58; Error&#58; none of the overloads of '_popcnt' are callable using argument types &#40;const&#40;ulong&#41;), candidates are&#58;
C&#58;\D\dmd2\windows\bin\..\..\src\druntime\import\core\bitop.d&#40;435&#41;&#58;        core.bitop._popcnt&#40;ushort x&#41;
C&#58;\D\dmd2\windows\bin\..\..\src\druntime\import\core\bitop.d&#40;437&#41;&#58;        core.bitop._popcnt&#40;uint x&#41;

abulmo · Post by **abulmo** » Sat May 21, 2016 6:38 pm

velmarin wrote:X 64 compiles very well and stably plays but not with itself less than half speed than your original executable.

Yes, I guess you use dmd;, which is the best compiler in term of stability & language reference, but not to optimize the code.

Code: Select all

X 32 depart popcnt instruction errors.

Yes, I know. I can add a workaround in my code, but it is obviously a bug or a serious limitation in the phobos library.

abulmo · Post by **abulmo** » Sat May 21, 2016 6:44 pm

Daniel Anulliero wrote:
Dann Corbit wrote:An amorphous predatory protozoan which eats its prey by surrounding it with its body and engulfing it.
Aah yes of course it's "amibe" in french
Thanks!

Yes. Actually, I borrowed the name from the algorithm I use to tune the eval parameter.
https://en.wikipedia.org/wiki/Nelder-Mead_method

velmarin · Post by **velmarin** » Sat May 21, 2016 7:09 pm

abulmo wrote:
velmarin wrote:X 64 compiles very well and stably plays but not with itself less than half speed than your original executable.
Yes, I guess you use dmd;, which is the best compiler in term of stability & language reference, but not to optimize the code.
Code: Select all
X 32 depart popcnt instruction errors.
Yes, I know. I can add a workaround in my code, but it is obviously a bug or a serious limitation in the phobos library.

Yes, thanks.

When I have time I'll try with GCD, it can be very interesting for other things and proyetcs..

If you want to arrange the 32 bits, obviously the performance is not as important, 32-bit users have another philosophy and more patience.

amoeba a new UCI engine

amoeba a new UCI engine

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