chess22k 1.8 released

[sandermvdb]

Score is about 2950 elo

- generation of pseudo-legal moves (no elo gain but cleaner code)
- refactored move generation class
- implemented late move pruning
- updated pruning margins (same as Laser)
- removed matethreat
- removed non significant eval terms
- added space evaluation
- use a material hash
- evaluate imbalances using # of pieces
- use full key when validating eval, pawn, material hash hit

https://github.com/sandermvdb/chess22k/releases/tag/1.8

[SzG]

Thanks Sander. It's not easy to make such a significant improvement when your engine is already close to the top.

[mike angel]

Nice - but how to get it running under Arena-Gui.
Have installed Oracle Java 9.04, but it does not work for me ..
Please someone give me a hint.

- solved: reinstall of Java helps me

[tpoppins]

Is there a way to run it under Cute Chess GUI? I would like to include it in some of my 40/40 tests, but neither the DLaunch method nor the "javaw -classsomethingorother blahblah" one worked.

Java 1.8 x86_64 and Win 7 x64 Pro here.

[sandermvdb]

Is there a way to run it under Cute Chess GUI? I would like to include it in some of my 40/40 tests, but neither the DLaunch method nor the "javaw -classsomethingorother blahblah" one worked.

Java 1.8 x86_64 and Win 7 x64 Pro here.

I am also using Cute Chess myself.
The binaries that I've uploaded to Github are compiled using Java 9, so you have to install JRE 9 (and I would deinstall Java 8):
http://www.oracle.com/technetwork/java/ ... 48532.html

To start it, you have to use the following command:
java -jar c:\chess22k-1.8.jar

Assuming that C:\Program Files\Java\jre-9.0.4\bin is on your Windows path.

[Adam Hair]

cmd="java -jar C:\chess22k-1.8.jar"

or in my case

cmd="java -jar C:\Users\Adam\Test_Folder\chess22k-1.8.jar"

[tpoppins]

Thank you muchly for the prompt replies, Sander and Adam!

[CMCanavessi]

Would it be possible to get windows binaries, so those of us who don't (and can't) have java installed can also run the engine?

[SzG]

Would it be possible to get windows binaries, so those of us who don't (and can't) have java installed can also run the engine?

What prevents you from installing java?

[sandermvdb]

Would it be possible to get windows binaries, so those of us who don't (and can't) have java installed can also run the engine?

There are some paid programs that can indeed compile java sourcecode to Windows binaries. I've looked into this some time ago but was disappointed with the performance and as I said, it was paid software.