Search found 1396 matches

by Ajedrecista
Tue May 28, 2019 6:00 pm
Forum: Computer Chess Club: General Topics
Topic: Can't for the life of me find that solution
Replies: 11
Views: 2015

Re: Can't for the life of me find that solution

Hello: don't you need depth 48 to find the mate #24 ? It depends on the unit of measure. Usual engines search X depths which means X plies (1 ply = 1 half move), but Chest mate solver has the option of 'SearchDepth n' which means n moves (understanding one move as two plies). In a problem of 'checkm...
by Ajedrecista
Sat May 11, 2019 9:10 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: win-chance for each root move
Replies: 19
Views: 2450

Re: win-chance for each root move

Hello: So 1.Na3 is the best move of all! :lol: I ran a script on 1.5M games and my results look like this: move # white draw black b1a3 72 48.611111% 5.555556% 45.833333% f2f3 162 46.913580% 6.172840% 46.913580% a2a4 160 46.875000% 10.000000% 43.125000% g2g4 1210 46.694215% 11.983471% 41.322314% b2b...
by Ajedrecista
Mon May 06, 2019 6:23 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Time reduction adding a/b to mini/max?
Replies: 9
Views: 1474

Re: Time reduction adding a/b to mini/max?

Hello: Not being a programmer, I want to point some things: ------------------------ alpha-beta search with random ordering should take around ((30 - 1 + sqrt(30^2+14*30+1)/4)^6) = 305 million nodes. The expected time taken for alpha-beta given your minimax time of 30 seconds would therefore be (305...
by Ajedrecista
Thu Apr 25, 2019 6:10 pm
Forum: Computer Chess Club: General Topics
Topic: Contrived position for perft
Replies: 15
Views: 2950

Re: Contrived position for perft.

Hello: if my engine is not wrong those are the results: 1: 60 2: 2608 3: 113742 4: 4812099 5: 202902054 6: 8419356881 My perft agrees: FEN string = r3k2r/1bp2pP1/5n2/1P1Q4/1pPq4/5N2/1B1P2p1/R3K2R b KQkq c3 0 1 Depth = 6 Leaf nodes = 8419356881 Time taken = 89945 ms A bit late, but the perft counter ...
by Ajedrecista
Sun Dec 16, 2018 11:09 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: sprt question
Replies: 3
Views: 1215

Re: SPRT question.

Hello Marco: hi, I need some help with SPRT. To test my engine I'm using openchess by Andy Grant. I'd like to ply a regression test and openbench uses sprt to stop the games. I don't want to exit from the framework, but I don't wnat that SPRT will stop my game too early, I'm now trying this test: a ...
by Ajedrecista
Fri Nov 16, 2018 4:46 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Any Fortran coder ?
Replies: 26
Views: 4331

Re: Any Fortran coder?

Hello: Friendly greetings ! I'm writing a chess engine (my 1st engine ! yay !), using fortran. I'm not sure which board representation would be a best fit for this language. Techincally, fortran doesn't have uint64_t (only signed) but it should be a very major problem if the bitfield is only used fo...
by Ajedrecista
Wed Nov 14, 2018 7:44 pm
Forum: Computer Chess Club: General Topics
Topic: Is Deep Blue source code open?
Replies: 23
Views: 4627

Re: Is Deep Blue source code open?

Hello: I remember glancing the code ten years back when I was helping Thomas gawk in improving toga eval, I have made a search in Google but I don't find the code, anyway is not worth it. You can find more interesting ideas in whatever up to date engine than in deepblue I thought it just has some hi...
by Ajedrecista
Fri Nov 02, 2018 6:55 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Schooner's Test Positions
Replies: 4
Views: 1335

Re: Schooner's test positions.

Hello Dennis: Thanks for the positions. I mainly use SF although I use Chest for some checkmate problems. Here is what I found: Analysis by SF 9 w32 (2 cores) with 128 MB of hash. No EGTB used. Hash cleared between searches: -------------------------------------------------- First position (also fou...
by Ajedrecista
Wed Oct 17, 2018 6:41 pm
Forum: Computer Chess Club: General Topics
Topic: Command line tool to output round-robin pairings?
Replies: 6
Views: 1312

Re: Command line tool to output Round Robin pairings?

Hello Jesse: Is there a command line tool which will take a list of participants, a number of rounds, and output pairings? For example: ./roundrobin rounds=3 players.txt cat players.txt engine1 engine2 engine3 engine4 output 1.1. engine1 engine2 1.2. engine2 engine1 1.3. engine3 engine4 1.4. engine4...
by Ajedrecista
Wed Oct 17, 2018 5:46 pm
Forum: Computer Chess Club: General Topics
Topic: What got you into computer chess?
Replies: 38
Views: 6950

Re: What got you into computer chess?

Hello: I would not know exactly. I think that my first chess software was ChessMaster 9000 back in 2005 or 2006. I started to read some chess forums like Rybka Forum, Immortal223 and TalkChess, following news about Ippolit, Robbolito, Ivanhoe, Houdini, Critter... I discovered perft by chance around ...