Search found 2883 matches

by Evert
Wed Apr 25, 2018 4:41 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Explaining heuristics with computer science, graph theory.
Replies: 19
Views: 1685

Re: Explaining heuristics with computer science, graph theor

To add to what I just wrote, "looking for an alternative to end-game tables" is a good way to phrase my problem. Specifically lighter on computation so a smartphone can do at least something in a few seconds. In SjaakII, I do the first step of tablebase generation on startup, to determine if the ki...
by Evert
Wed Apr 25, 2018 4:40 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Explaining heuristics with computer science, graph theory.
Replies: 19
Views: 1685

Re: Explaining heuristics with computer science, graph theor

Interesting point... maybe I should also try a directed graph. For pawns this would show tiles that are not part of any cycles. You can leave the tile but not return. This would also apply to a rook-like piece which cannot move left, etc. Not totally sure yet how this interacts with other graph fea...
by Evert
Tue Apr 24, 2018 9:48 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Explaining heuristics with computer science, graph theory.
Replies: 19
Views: 1685

Re: Explaining heuristics with computer science, graph theor

1) Pawn structure. What is it about pawn moves compared to other pieces that makes this important? What impact would it have if pawns could move backward? If pawns could move backward, you lose the concept of backward pawns, which seems like a big deal. The importance of pawn structure comes not on...
by Evert
Sat Apr 21, 2018 6:48 am
Forum: Computer Chess Club: General Topics
Topic: Dynamic piece square tables for chess variants?
Replies: 12
Views: 1039

Re: Dynamic piece square tables for chess variants?

Hello! First post here. I'm working on a smartphone interface and AI (now playable!) which allows the player to make custom board shapes and sizes, and pieces with custom move rules. One enhancement I'd like for my AI are piece square tables. However I'm facing some challenges. Because any board/pi...
by Evert
Thu Apr 12, 2018 9:09 pm
Forum: Computer Chess Club: General Topics
Topic: Potential forum software update (at last)
Replies: 8
Views: 1493

Re: Potential forum software update (at last)

There is a lot of very useful discussion in the archives. Purging that sounds like a really bad idea. There are certainly a number of threads I'd want to archive for my own use if that were to happen, but even then: I sometimes search for relevant information, but I can hardly do that ahead of time....
by Evert
Sun Apr 08, 2018 12:43 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: CrazyWa bug / Kyoto Shogi
Replies: 25
Views: 2258

Re: CrazyWa bug / Kyoto Shogi

For me the black pieces are written in light grey. http://hgm.nubati.net/sjaak.png Interesting. It looks like it's printing all piece codes with high intensity set, while in Linux/OS X it doesn't have high intensity set on either the White or the Black pieces. Will investigate. Kyoto Shogi is so un...
by Evert
Sun Apr 08, 2018 12:01 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: CrazyWa bug / Kyoto Shogi
Replies: 25
Views: 2258

Re: CrazyWa bug / Kyoto Shogi

It assigns a very low value to the Pawn. I suppose it doesn't sufficiently account for the fact that even the weak pieces have a lot of 'latent' value because they will turn into strong pieces after they move. Also the dependence on the location for irreversible pieces seems a very important aspect...
by Evert
Sun Apr 08, 2018 10:17 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: CrazyWa bug / Kyoto Shogi
Replies: 25
Views: 2258

Re: CrazyWa bug / Kyoto Shogi

Thank you! I had forgotten all about that. :oops: That is, I remember having discussed what could be done in WinBoard, but I did not remember the Sjaak II problems. Apparently the fix never made it beyond the beta stage. This one also has Kyoto Shogi in its variants.txt file. You know, I had quite ...
by Evert
Sat Apr 07, 2018 8:14 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: CrazyWa bug / Kyoto Shogi
Replies: 25
Views: 2258

Re: CrazyWa bug / Kyoto Shogi

Not really. But I did look in the file variants.txt, and the word 'kyoto' does not appear there. My bad! I apparently mis-remembered that Kyoto Shogi was included. Looking at my local set of files, I actually have two different definitions: one using Shogi-style promotions, one using Western-style ...
by Evert
Sat Apr 07, 2018 3:26 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: CrazyWa bug / Kyoto Shogi
Replies: 25
Views: 2258

Re: CrazyWa bug / Kyoto Shogi

True, but things in general work more smoothly is they do not require communication with the engine. And it puts a rather large burden on the engine to support the highlight protocol. If the depth of a promotion zone can be adapted by just =N in the setup command, as it should for rectagular zones,...