Search found 1242 matches

by mvanthoor
Wed Jul 28, 2021 6:07 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Fortress detection?
Replies: 9
Views: 1342

Re: Fortress detection?

Silver has many moves. If he plays top-down, then he can (and I assume must) capture one of the Gold Kings, and moving the King on h8 would be illegal. So I assume he plays bottom-up. In which case he can move all of his checkors except one. (Apparently checkers cannot capture backwards, so that mo...
by mvanthoor
Mon Jul 26, 2021 10:27 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Fortress detection?
Replies: 9
Views: 1342

Re: Fortress detection?

I don't know enough about Checkers to even see why the presented position is a fortress. IIRC, in Checkers, you lose when you have no moves left. Silver has one move, with the king in the top right, going back and forth. Gold can not capture any of the silver pieces. (You jump over them, and land o...
by mvanthoor
Sat Jul 24, 2021 11:51 pm
Forum: Computer Chess Club: General Topics
Topic: New engine releases & news 2021
Replies: 531
Views: 193224

Re: New engine releases & news 2021

NNUE or NN ? The executable is small .......and nothing impressive in the play of this Rust engine. Dude. Be fair. I didn't know on top of my head where Ktulu is in the CCRL list, and I never heard of Velvet. I just downloaded it and started a test against current Rustic dev (~2150) and Minimalches...
by mvanthoor
Fri Jul 23, 2021 10:32 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Progress on Loki
Replies: 78
Views: 39376

Re: Progress on Loki

The future of Loki As a last thing, I feel like I should mention what Loki's future holds... I just graduated high-school in June (celebrations of this is also the reason I haven't worked much on Loki the last weeks) and because of that, I will have to start working. This in turn means that I proba...
by mvanthoor
Thu Jul 22, 2021 9:56 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Not reproducible
Replies: 5
Views: 866

Re: Not reproducible

Just make an extra King PST with 0 for the king being in the center, and increasing penalties when it nears the edge and the corners. Make sure the penalties increase rapidly. So, center is 0; one file closer to the edge is -5, two files closer to the edge is -20, and so on. Only use this table when...
by mvanthoor
Wed Jul 21, 2021 3:35 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: 1k zx chess sources question
Replies: 13
Views: 1665

Re: 1k zx chess sources question

I hope you and HGM doesn't mind that I'm answering this, as I happen to be in this thread now. Mr. Muller I just confused about the following thing: fit program to certain amount of RAM and source code size. So this is my current understanding: 1. In RAM we load things like board array, piece offset...
by mvanthoor
Wed Jul 21, 2021 3:18 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: 1k zx chess sources question
Replies: 13
Views: 1665

Re: 1k zx chess sources question

maksimKorzh wrote:
Wed Jul 21, 2021 12:39 pm
Oh Marcel!
Sargon!
That's the name!
I was trying to recall it but totally forgot!
There was an entire thread here dedicated to it!
Thank you!
Have fun with it :) I had Sargon 5 in the beginning of the 90's, before I switched to Fritz. It was a good program, great graphics for its time.
by mvanthoor
Wed Jul 21, 2021 9:33 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: 1k zx chess sources question
Replies: 13
Views: 1665

Re: 1k zx chess sources question

Hi guys, I have a few questions on 1k zx chess by David Horne: 1. 1K means 1K of RAM? 2. Were there any limitations on source code size? 3. Is it written in assembly because BASIC interpreter takes some RAM on it's own? 4. Are there any ports of 1k zx chess from assembly to whatever languages? I'm ...
by mvanthoor
Tue Jul 20, 2021 8:33 pm
Forum: Computer Chess Club: General Topics
Topic: Can an engine calculate how fast Human GM lose ratings after 55 ?
Replies: 12
Views: 1744

Re: Can an engine calculate how fast Human GM lose ratings after 55 ?

At age 63 my fide rating was about the same as it averaged over the previous forty years. Only after that I started to decline about 20 elo per year. I've noticed that "lower" rated GM's (the ones that are between 2600 and 2700 their entire life) seem to decline less rapidly, compared to the >= 270...
by mvanthoor
Tue Jul 20, 2021 8:24 pm
Forum: Computer Chess Club: General Topics
Topic: Can an engine calculate how fast Human GM lose ratings after 55 ?
Replies: 12
Views: 1744

Re: Can an engine calculate how fast Human GM lose ratings after 55 ?

Not all GM's lose rating after age 55 I do not see that the following GM lost rating after age 55(he was 55 years old in 2014) https://ratings.fide.com/profile/200930/chart You just flippantly ignored the fact that this GM lost about 140 points between 45 and 55. He gained some back since he was 55...