Search found 1404 matches

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: 1748

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: 3542

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: 1350

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: 4812

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: 5383

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: 1498

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: 1503

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: 8025

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 ...
by Ajedrecista
Wed Oct 03, 2018 6:57 pm
Forum: Computer Chess Club: General Topics
Topic: Blunderer v1.0 and 1.1 from the year 2013
Replies: 3
Views: 1180

Re: Blunderer v1.0 and 1.1 from the year 2013

Hello Norbert: Hello, several years ago I downloaded v1.1. but the Windows executable file (2013/02/08) shows v1.0. Do you still own both versions of Blunderer? If yes, could you upload please these versions on Google Drive, Mediafire or anywhere else? The former computerchess download links are unf...
by Ajedrecista
Fri Sep 21, 2018 4:26 pm
Forum: Computer Chess Club: General Topics
Topic: Endgame
Replies: 17
Views: 3531

Re: Endgame.

Hello: According to 'Yet another chess problem database', this problem is from 1981: http://yacpdb.org/#286033 Matouš, Mário L'Italia Scacchistica (346) 1981 3rd Prize Solution: 1. Nc2+ $1 (1. Nxb3+ $2 Kb1) (1. Be5 $2 Kb1 $1) 1... bxc2 2. Rf1+ $1 Bxf1 3. Kc1 Re7 4. Bd2 Rc7 5. Bb4 $1 Rc8 $1 6. Be7 Rc...