Search found 4130 matches

by syzygy
Tue Jul 24, 2012 1:36 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: pawn enumeration
Replies: 130
Views: 10285

Re: pawn enumeration

The problem is how to enumerate the pawns in closer to promotion order so that they can be sliced. During generation, what you need is an indexing function with the property that if position A can be reached by pawn moves (and piece moves) from position B, then index of position A < index of positi...
by syzygy
Thu Jul 19, 2012 11:44 am
Forum: Computer Chess Club: General Topics
Topic: Komodo and Don...
Replies: 10
Views: 2480

Re: Komodo and Don...

MM wrote:What i know precisely is that for several different reasons, me, that i am a customer and i made a donation to Komodo project, i don't have anything after so many months and after having read so many news about Komodo that never transfer to releases.
Did you pay for something you did not get?
by syzygy
Wed Jul 18, 2012 11:55 am
Forum: Computer Chess Club: General Topics
Topic: Longest Mate
Replies: 14
Views: 2325

Re: Longest Mate

Letting the number of moves depend on available egtb knowledge seems silly to me. Not to me. It means that your rule is not artificially interfering with the game. If a contrived rule is needed to ensure the game ends, IMO it should be as permissive as possible, so that the other rules take priorit...
by syzygy
Wed Jul 18, 2012 11:46 am
Forum: Computer Chess Club: General Topics
Topic: Longest Mate
Replies: 14
Views: 2325

Re: Definitive explanation.

Then, I opened the merged file made with Merge_PGN.bat with Notepad and searched one by one, until I found a checkmate in 1090 half-moves: [d]8/6R1/8/6N1/3k1K2/1B6/7n/7q w - - I was thinking this can't be right, since the longest win in this tablebase is well-known to be 517 (full) moves (see e.g. ...
by syzygy
Wed Jul 18, 2012 12:55 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Compression of chess databases
Replies: 52
Views: 6191

Re: Compression of chess databases

And now you have to distribute Criter 1.6a july 27,2012 version with your decompressor...savy? :) Otherwise it won't decompress properly. Try it on a bigger database with 4+ search and it won't ever finish. So a good trick is not to do 4+ search but keep it cheap. Of course what you can do fully de...
by syzygy
Tue Jul 17, 2012 11:17 pm
Forum: Computer Chess Club: General Topics
Topic: Mat in .... ?
Replies: 22
Views: 3107

Re: Mat in .... ?

zullil wrote:Critter-1.6a appears to have found a mate-in-13 using MultiPV=3:

Code: Select all

33/74  27&#58;43   16593M   9975K   +M13 Rxh2 Re1 Rcc2 Ke3 Rcd2 a5 Rhf2 Rf1 Rxf1 Kxd2 g4 Ke2 Rf3 Kd2 g3 Ke2 Kf4 Kd2 g2 Kc2 g1=Q Kb2 Qg2+ Kc1 Rf1#

(...)
Seems to be correct.
by syzygy
Tue Jul 17, 2012 9:55 pm
Forum: Computer Chess Club: General Topics
Topic: Mat in .... ?
Replies: 22
Views: 3107

Re: Mate in ...?

28 26:13 9.194.233,873 5.843 +M13 a2a3 d3d4 c8d8 d4c4 a3e3 h2g1 d8c8 c4b4 a6a5 b4a5 e3b3 g1a7 c8a8 a5a6 a8a7 a6a7 g5g4 a4a5 g4g3 a7a8 g3g2 a8a7 g2g1q a7a6 g1g2 a6a7 g2b7 Given that the mate-in-14 lines have Ke2 as black's first reply instead of Kd4, it would be interesting to know how Baron finds a...
by syzygy
Tue Jul 17, 2012 9:29 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Compression of chess databases
Replies: 52
Views: 6191

Re: Compression of chess databases

- In term of data, it is very hard task for moves in my database when they are encoded into 6-8 bit Are you applying your compressor on data that has the moves encoded in a variable number of bits? Most compressors are designed to compress bytes rather than bits, so it would most probably be better...
by syzygy
Tue Jul 17, 2012 9:16 pm
Forum: Computer Chess Club: General Topics
Topic: Mat in .... ?
Replies: 22
Views: 3107

Re: Mate in ...?

28 26:13 9.194.233,873 5.843 +M13 a2a3 d3d4 c8d8 d4c4 a3e3 h2g1 d8c8 c4b4 a6a5 b4a5 e3b3 g1a7 c8a8 a5a6 a8a7 a6a7 g5g4 a4a5 g4g3 a7a8 g3g2 a8a7 g2g1q a7a6 g1g2 a6a7 g2b7 Given that the mate-in-14 lines have Ke2 as black's first reply instead of Kd4, it would be interesting to know how Baron finds a...
by syzygy
Tue Jul 17, 2012 7:19 pm
Forum: Computer Chess Club: General Topics
Topic: Longest Mate
Replies: 14
Views: 2325

Re: Longest Mate

Just letting those of you who are not aware of it but the latest and longest distance to mate is now Mate in 691 !! Thats right you heard 691. Really a draw by 50 move rule, I'd bet. A lame rule that should disappear or be changed, at least for computer games. I agree. As I see it, the 50 moves rul...