Search found 23 matches

by alessandro
Wed Sep 18, 2019 5:03 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Level 11 Perft statistics
Replies: 5
Views: 1367

Re: Level 11 Perft statistics

Hi Andreas!

Good job! I'm happy to hear that AdaChess was in some way useful for you!
by alessandro
Mon Aug 12, 2019 7:49 pm
Forum: Computer Chess Club: General Topics
Topic: AdaChess release 3.6 available!
Replies: 2
Views: 712

AdaChess release 3.6 available!

Hi everyone! I am happy to announce the new release of AdaChess, named 3.6 It fixed some bugs of the previous version (the 3.4), and comes with two major features: null move verification and ponder. According to the g-sei (the Italian chess programmer group) the engine elo is around 1900-2000. Sourc...
by alessandro
Thu Aug 08, 2019 8:26 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: max number of pseudo legal move
Replies: 29
Views: 5281

Re: max number of pseudo legal move

Here is a fun one for you, a position with 205 best moves: 3Q4/R6Q/2Q4Q/4Q3/1Q4Q1/3Q4/Q4RNp/2BK1Nkq w - - The best moves are: Ba3 Bb2 Bd2 Be3 Bf4 Bg5 Kc2 Kd2 Ke1 Ke2 Ne1+ Nf4+ Nfe3 Ng3 Nge3+ Nh4+ Nxh2 Q3d4 Q3d5 Q3d6 Q3d7 Q6g7 Q7g6 Q7g7 Q8d4 Q8d5 Q8d6 Q8d7 Qaa1 Qaa3 Qaa4 Qaa5 Qaa6 Qab1 Qab2 Qab3 Qac...
by alessandro
Tue Mar 12, 2019 6:04 am
Forum: Computer Chess Club: General Topics
Topic: AdaChess v.30 released
Replies: 25
Views: 3603

Re: AdaChess v.30 released

Hi, Many thanks for letting me know! It seems to be a bug into the hash table. Really curious that it never occurred into the g-sei tournament in which AdaChess played just a day before being released! Sorry for this inconvenience! I will release a fixed version as soon as possible. Greetings, Aless...
by alessandro
Tue Mar 05, 2019 8:13 pm
Forum: Computer Chess Club: General Topics
Topic: AdaChess v.30 released
Replies: 25
Views: 3603

Re: AdaChess v.30 released

Hi Graham,

roughly should be between 1800 and 1900.

I just noticed that I uploaded the wrong executable version. Sorry!
I have updated now the right one, therefore everyone must download it again. Sorry for this inconvenience.
by alessandro
Tue Mar 05, 2019 5:50 pm
Forum: Computer Chess Club: General Topics
Topic: AdaChess v.30 released
Replies: 25
Views: 3603

Re: AdaChess v. 3.4 released

Hi everyone! I've just release a new intermediate version of AdaChess. It contains some bug fixes and some small improvements. The three main changes compared to the previous version are: * The search explosion bug has been fixed * The three-fold-repetition bug has been partially fixed. Sometimes st...
by alessandro
Mon Dec 10, 2018 4:01 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: fast(er) movegen
Replies: 34
Views: 6210

Re: fast(er) movegen

AdaChess uses a 10x12 array for the board design plus and a pieces-list to quickly find where the pieces are located. The most expensive task while generating moves is the test for validity: not leaving the king in check. Therefore, engines tends to either don't test it (and leave the search to skip...
by alessandro
Sun Nov 04, 2018 9:45 am
Forum: Computer Chess Club: General Topics
Topic: AdaChess v.30 released
Replies: 25
Views: 3603

Re: AdaChess v.30 released

Jamal Bubker wrote:
Sun Nov 04, 2018 9:27 am
Hi Alessandro !

Thanks for releasing your chess engine :D
My pleasure. And thanks you too, to play with it! :D
by alessandro
Sun Nov 04, 2018 9:44 am
Forum: Computer Chess Club: General Topics
Topic: AdaChess v.30 released
Replies: 25
Views: 3603

Re: AdaChess v.30 released

Care to share how you managed to fix it, in layman's terms? (I know next to nothing about Ada). The problem itself is still a bit unclear to me: I used the Yield function from the standard library to sleep a thread. Why the thread was still awake? I need to look further to answer this question in d...
by alessandro
Sat Nov 03, 2018 7:30 pm
Forum: Computer Chess Club: General Topics
Topic: AdaChess v.30 released
Replies: 25
Views: 3603

Re: AdaChess v.30 released

I fixed the CPU usage bug. The version named 3.1 is available for download on http://www.adachess.com/
I wish to thanks you guys for your feedback. Communities always helps to improve our work.
I hope you enjoy AdaChess!