Search found 167 matches

by Spliffjiffer
Wed Jul 17, 2019 3:45 pm
Forum: Computer Chess Club: General Topics
Topic: One more issue with king safety/attack for Stockfish
Replies: 27
Views: 915

Re: One more issue with king safety/attack for Stockfish

yes, when i use only 1 core (but 1024 hash as before) SF needs about 2,5 minutes to find Qg6 at depth 35 as you assumed ! but if i switch back to 4 cores (hash cleaned, Arena-GUI restarted) it always takes only 10 to 20 seconds to find Qg6...quite strange...i used SF BYO (Stockfish Build on Your Own...
by Spliffjiffer
Wed Jul 17, 2019 2:35 pm
Forum: Computer Chess Club: General Topics
Topic: One more issue with king safety/attack for Stockfish
Replies: 27
Views: 915

Re: One more issue with king safety/attack for Stockfish

i dont wanna talk away the problems SF has when it comes to sacrifices in terms of make kings naked but "my" latest SF ("Fix bench", Sun Jul 14 15:21:08 2019 +0200 by MC) finds Qg6 in about 13 seconds (tried 2 times) on an old APU 7870k-4 cores-CPU while SF10 needs much longer in this particular cas...
by Spliffjiffer
Wed Jul 17, 2019 2:16 pm
Forum: Computer Chess Club: General Topics
Topic: 7 Man Syzygy and SSD
Replies: 46
Views: 3987

Re: 7 Man Syzygy and SSD

as far as i know u can easily store the DTZ on a HDD (maybe even USB id believe) !?
if im wrong on this someone will correct me surely.
1,9 TB is a lot, i have only 342 GB of WDL7 which is pretty much sufficient in most cases in terms of verifying a win/draw :-)
by Spliffjiffer
Sun Jun 23, 2019 2:48 pm
Forum: Computer Chess Club: General Topics
Topic: Arasan test suite - draft version
Replies: 28
Views: 2230

Re: Arasan test suite - draft version

hi John, id like to thank you for the new suite !! here are 2 (3) more testpositions i came accross over the last few months, maybe they are of interest for you as well (all about king-safety): 1. r1bq1r2/1ppnbpkp/n2p2p1/p2Pp3/2P1P1P1/2N1BN2/PP1KBP2/R2Q3R w - - 0 1 1. Rxh7+ Kxh7 2. Qh1+ Kg8 3. Qh6 R...
by Spliffjiffer
Wed Jun 19, 2019 12:58 am
Forum: Computer Chess Club: General Topics
Topic: is this an issue with missing DTZ ?
Replies: 7
Views: 553

Re: is this an issue with missing DTZ ?

i see that the bug was found and already fixed (as far as i understood)...im glad that i could help a tiny bit in terms of verifying when to search...this should close the thread, thx for the replys :-)
by Spliffjiffer
Tue Jun 18, 2019 8:21 pm
Forum: Computer Chess Club: General Topics
Topic: is this an issue with missing DTZ ?
Replies: 7
Views: 553

Re: is this an issue with missing DTZ ?

@ syzygy: yes thats correct: with multiPV=5 last SF-dev's are showing: lose, lose, draw, lose, lose ...insane but true (here on my pc at least)

@Louis: thanks for the related link...seems like a bug indeed from my pov :-(
by Spliffjiffer
Tue Jun 18, 2019 4:09 pm
Forum: Computer Chess Club: General Topics
Topic: is this an issue with missing DTZ ?
Replies: 7
Views: 553

Re: is this an issue with missing DTZ ?

little update: i think i found out that this issue happens only after some patch released on exactely the 09.06.2019...sry for not beeing able to delimit this further (internet connection problems)...sry for the (probably) misleading headline as well because it seems pretty much clear now to me that...
by Spliffjiffer
Tue Jun 18, 2019 2:46 pm
Forum: Computer Chess Club: General Topics
Topic: is this an issue with missing DTZ ?
Replies: 7
Views: 553

is this an issue with missing DTZ ?

i have no 7-men syzygy's DTZ installed, only some WDL (among these is KBPPvKBP) [d]2b5/8/3k3p/P7/8/3K1BP1/8/8 b - - 0 1 here SF lost with 1...Bh3 ?? while WDL is giving 0.00 for 1...Kc5 (only move)...SF was running on multiPV=1. if i look "into its brain" by using multiPV say =5 its showing 1...Kc5 ...
by Spliffjiffer
Wed Feb 20, 2019 9:18 pm
Forum: Computer Chess Club: General Topics
Topic: Really difficult mate
Replies: 7
Views: 1196

Re: Really difficult mate

yes, to trick machines with lets say multi PV first and let them now think in single PV or give them inside with multiple variation before and let them run again (oc with the filled hashes) is known to myself...the point was (until now at least) that not nearly every position can be handled like thi...
by Spliffjiffer
Sat Feb 16, 2019 6:24 pm
Forum: Computer Chess Club: General Topics
Topic: Really difficult mate
Replies: 7
Views: 1196

Re: Really difficult mate

a well known nice old problem...the solution is the given one and afaict it is correct (never found anything better) :-)...the initial and 9. Kc8 are the critical moves to find (for engines)