Search found 799 matches

by elcabesa
Thu May 02, 2019 3:31 pm
Forum: Computer Chess Club: General Topics
Topic: Simple mate in 6 that gives some engines trouble
Replies: 20
Views: 2417

Re: Simple mate in 6 that gives some engines trouble

Vajolet finally found it after 45 minutes :)
by elcabesa
Sun Apr 28, 2019 12:20 pm
Forum: Computer Chess Club: General Topics
Topic: Test Position 31.Qh8!
Replies: 7
Views: 663

Re: Test Position 31.Qh8!

I'm not a big chess player, but what white cha achieve after Qh8! ? I let Stockfish and Vajolet search a lot but cannot din anython but draw
by elcabesa
Sat Apr 27, 2019 9:03 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: calculating seldepth
Replies: 2
Views: 393

Re: calculating seldepth

some engine calculate seldepth as the max depth reached in search/qsearch, some other (i.e. stockfish) calculate the max depth reached by a PV node
by elcabesa
Tue Apr 23, 2019 4:30 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: 7-man Syzygy support in Fathom
Replies: 8
Views: 1057

Re: 7-man Syzygy support in Fathom

jdart wrote:
Tue Apr 23, 2019 3:48 pm
Probably best to fork it/send a pull request.

--Jon
done, please check it :)
by elcabesa
Tue Apr 23, 2019 2:46 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: 7-man Syzygy support in Fathom
Replies: 8
Views: 1057

Re: 7-man Syzygy support in Fathom

jdart wrote:
Tue Apr 23, 2019 2:55 am
I have pushed a branch with changes to support 7-man tbs, here:
I Jon,
I have some small patch to your 6man code that will correct some warning reported by the compiler.

where can I send it? shall I fork your repository and create a pull request? os shall I send a patch file?
by elcabesa
Sun Apr 21, 2019 8:37 am
Forum: Computer Chess Club: General Topics
Topic: Contrived position for perft
Replies: 15
Views: 2154

Re: Contrived position for perft

another possibile source of problem is the interaction of "pin" and en passant. I think this is rare but it can happen.
here an example where en passant capture is forbidden (fxe3)
by elcabesa
Sun Apr 21, 2019 8:31 am
Forum: Computer Chess Club: General Topics
Topic: Contrived position for perft
Replies: 15
Views: 2154

Re: Contrived position for perft

if my engine is not wrong those are the results:
1: 60
2: 2608
3: 113742
4: 4812099
5: 202902054
6: 8419356881
by elcabesa
Sat Apr 20, 2019 3:17 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: No standard specification for Perft
Replies: 22
Views: 3366

Re: No standard specification for Perft

In my engine I use perft and divide to test the correctness of the engine. Whit this goal, I use the same move generator, do/undo move routines and the move selector. I tested my engine in a lot of random positions and checked the result against stockfish. This helped me validating the code. Sometim...
by elcabesa
Sun Apr 14, 2019 7:23 am
Forum: Computer Chess Club: General Topics
Topic: Vajolet2 2.7 release
Replies: 6
Views: 1085

Re: Vajolet2 2.7 release

Wow, after a week of CCRL games, it looks likes that Vajolet2 2.7 has gained 30 Elo point over Vajolet2 2.6 :D

a really pleasant discovery.

Thank you CCRL boys