Search found 643 matches

by Joerg Oster
Wed Apr 17, 2019 4:26 pm
Forum: Computer Chess Club: General Topics
Topic: The problem with adjudication based on score
Replies: 26
Views: 1106

Re: The problem with adjudication based on score

Do any engines correctly score 4k3/rr6/2p1p1p1/1pPpPpPp/pP1P1P1P/P7/8/3K4 w - - 0 1 to be a draw? Yes. :D Just recently added a 1st blockade detection rule to my SF fork. Patch is here: https://github.com/joergoster/Stockfish/commit/9c67b6a6874f2e8f2fb64f94504615020293f1ef position fen 4k3/rr6/2p1p...
by Joerg Oster
Wed Apr 17, 2019 10:27 am
Forum: Computer Chess Club: General Topics
Topic: The problem with adjudication based on score
Replies: 26
Views: 1106

Re: The problem with adjudication based on score

konsolas wrote:
Wed Apr 17, 2019 10:03 am
Nice! Have you considered PR'ing that change to the main version?
No.
It only fixes a corner-case without any measurable benefit.
by Joerg Oster
Wed Apr 17, 2019 10:01 am
Forum: Computer Chess Club: General Topics
Topic: The problem with adjudication based on score
Replies: 26
Views: 1106

Re: The problem with adjudication based on score

Do any engines correctly score 4k3/rr6/2p1p1p1/1pPpPpPp/pP1P1P1P/P7/8/3K4 w - - 0 1 to be a draw? Yes. :D Just recently added a 1st blockade detection rule to my SF fork. Patch is here: https://github.com/joergoster/Stockfish/commit/9c67b6a6874f2e8f2fb64f94504615020293f1ef position fen 4k3/rr6/2p1p...
by Joerg Oster
Sat Apr 06, 2019 8:21 am
Forum: Computer Chess Club: General Topics
Topic: Strange artifact of Syzygy format
Replies: 5
Views: 458

Re: Strange artifact of Syzygy format

Dann Corbit wrote:
Fri Apr 05, 2019 6:22 pm
That's not a mate score.
It shows a win.
By clicking through the mating sequence at https://syzygy-tables.info/?fen=1K6/1R6 ... _w_-_-_0_1
you'll notice many 'only' moves.
Search alone will never find the mating line but by sheer luck.

That's why we use tablebases.
by Joerg Oster
Fri Feb 22, 2019 11:08 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Utility to calculate average depth from PGN files
Replies: 6
Views: 407

Re: Utility to calculate average depth from PGN files

Title says it all.. anyone know of a utility which can parse a PGN file and tell me the average depth searched of program A vs program B? SOMU - function Match stats http://rebel13.nl/download/utilities.html Examples: http://rebel13.nl/text/match-stat-1.htm http://rebel13.nl/text/match-stat-2.htm V...
by Joerg Oster
Fri Feb 22, 2019 10:38 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Utility to calculate average depth from PGN files
Replies: 6
Views: 407

Re: Utility to calculate average depth from PGN files

Title says it all.. anyone know of a utility which can parse a PGN file and tell me the average depth searched of program A vs program B? SOMU - function Match stats http://rebel13.nl/download/utilities.html Examples: http://rebel13.nl/text/match-stat-1.htm http://rebel13.nl/text/match-stat-2.htm V...
by Joerg Oster
Mon Feb 18, 2019 5:02 pm
Forum: Computer Chess Club: General Topics
Topic: EG Cook
Replies: 21
Views: 1299

Re: Cooking the Cook (not)

Suggested repair is moving the Knight one square down :roll: Now it is become a simple Mate in 10 problem... Won't get a prize. It turned out not to be easy for Kaissa though it had the first move wrong. At least that is what it thinks. So, for engines: who finds the right move fastest and sees Mat...
by Joerg Oster
Sat Feb 09, 2019 9:00 am
Forum: Computer Chess Club: General Topics
Topic: McCain X1 Source Available
Replies: 28
Views: 2482

Re: McCain X1 Source Available

We now have some Windows and macOS exe's. The Linux flavors have not compile properly and the reason is unknown at this time. The makefile contains the bench for McCain - if you compile the Linux flavor and the the the total node count matches the makefile (4914655) , please let me know. Also you c...
by Joerg Oster
Sun Feb 03, 2019 11:30 am
Forum: Computer Chess Club: General Topics
Topic: start your engines...
Replies: 14
Views: 1235

Re: start your engines...

q4bk1/pb4p1/1p2pp2/3n3p/2NP4/1P3BP1/PB3P1P/R1R3K1 b - - 0 1 ; best move Nf4 from a 2017 ICCF game, found on the HIARCS ICCF forum ... It takes Zander more than 7 minutes to find Nf4, 3 Threads, 1 GB Hash, 6-syzygy: info depth 36 seldepth 64 multipv 1 score cp 121 nodes 1727920009 nps 4303039 hashfu...
by Joerg Oster
Thu Jan 24, 2019 3:14 pm
Forum: Computer Chess Club: General Topics
Topic: a test position that I composed
Replies: 13
Views: 1176

Re: a test position that I composed

This one looks really tough. If you force Kb2 Kd7 then SF gets it quickly, but even SF struggles otherwise. EDIT: I spoke too soon, SF manages in the original position. SF10 from Lichess got it right. Not single-threaded and without TBs. 128 MB Hash, 1 Thread, no TBs, 5 min: info depth 77 seldepth ...