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by zullil
Wed May 06, 2020 10:58 am
Forum: Computer Chess Club: General Topics
Topic: Any engines good at solving puzzles like this?
Replies: 29
Views: 1104

Re: Any engines good at solving puzzles like this?

Current code seems to solve it fairly quickly, even without altering the null move status. I'll try Stockfish-dev (unaltered) again. Maybe my first run was unlucky. Or your was very lucky. Looking at the position (with extremely limited move choices for both sides) I think it was my mobility tweak ...
by zullil
Tue May 05, 2020 11:28 pm
Forum: Computer Chess Club: General Topics
Topic: Any engines good at solving puzzles like this?
Replies: 29
Views: 1104

Re: Any engines good at solving puzzles like this?

Dann Corbit wrote:
Tue May 05, 2020 11:21 pm
It's a rogue project, he does not publish the source code.
The author is not required to "publish" the source code. But is he not legally obligated to make it available (upon request) to anyone who has been given a binary produced from the source code?
by zullil
Tue May 05, 2020 11:18 pm
Forum: Computer Chess Club: General Topics
Topic: Any engines good at solving puzzles like this?
Replies: 29
Views: 1104

Re: Any engines good at solving puzzles like this?

Is Eman 5.40 available? I don't see it on CCRL or on wiki engine list. Eman isn't publicly available. Hi Peter, Since this engine is a modification of Stockfish, if you received the binary from the author you are entitled to the source code. Or so I believe, based on the Stockfish GPL. Have you req...
by zullil
Tue May 05, 2020 8:24 pm
Forum: Computer Chess Club: General Topics
Topic: Any engines good at solving puzzles like this?
Replies: 29
Views: 1104

Re: Any engines good at solving puzzles like this?

Dann Corbit wrote:
Tue May 05, 2020 8:18 pm
Current code seems to solve it fairly quickly, even without altering the null move status.
I'll try Stockfish-dev (unaltered) again. Maybe my first run was unlucky. Or your was very lucky.
by zullil
Tue May 05, 2020 4:55 pm
Forum: Computer Chess Club: General Topics
Topic: Any engines good at solving puzzles like this?
Replies: 29
Views: 1104

Re: Any engines good at solving puzzles like this?

7N/pp6/8/8/8/3kpppp/3prqrp/K2Qbbnn w - - 0 1 White to win None of Stockfish, Sting SF, and Crystal can solve in 10min on my machine. Well, Stockfish-dev with nullmove reduction fully disabled seems to be finding something: info depth 72 seldepth 88 multipv 1 score cp 9 lowerbound nodes 29465033952 ...
by zullil
Tue May 05, 2020 4:28 pm
Forum: Computer Chess Club: General Topics
Topic: Any engines good at solving puzzles like this?
Replies: 29
Views: 1104

Re: Any engines good at solving puzzles like this?

7N/pp6/8/8/8/3kpppp/3prqrp/K2Qbbnn w - - 0 1 White to win None of Stockfish, Sting SF, and Crystal can solve in 10min on my machine. Well, Stockfish-dev with nullmove reduction fully disabled seems to be finding something: info depth 72 seldepth 88 multipv 1 score cp 9 lowerbound nodes 29465033952 ...
by zullil
Tue May 05, 2020 1:57 pm
Forum: Computer Chess Club: General Topics
Topic: test the intelligence of your engine
Replies: 9
Views: 752

Re: test the intelligence of your engine

abulmo2 wrote:
Tue May 05, 2020 1:43 pm
zullil wrote:
Tue May 05, 2020 1:31 pm


What move did Black just make?
b8a8
and previous white move was b6xa7
Yup, I forgot to consider the pawn capturing on a7.
by zullil
Tue May 05, 2020 1:31 pm
Forum: Computer Chess Club: General Topics
Topic: test the intelligence of your engine
Replies: 9
Views: 752

Re: test the intelligence of your engine

How many iteration does your program do in the following position: Only few smart programs do not more than 1 iteration Another question is how many different moves chess programs are going to suggest(all moves have the same stalemate value so no move is a mistake) k2N4/P7/K7/3PPP2/8/8/R7/R5B1 w - ...
by zullil
Mon May 04, 2020 11:54 am
Forum: Computer Chess Club: General Topics
Topic: Giving up the center
Replies: 27
Views: 2340

Re: Giving up the center

Yes, Lc0 (network ) preferred Bb5 ... until it crashed. There's a bug in the code somewhere ... info depth 25 seldepth 67 time 1898107 nodes 34661891 score cp 45 wdl 491 315 194 nps 18285 tbhits 0 pv f1b5 c8d7 e1g1 f8e7 d4c6 d7c6 b5c6 b7c6 f2f4 e8g8 b2b3 a7a5 d1f3 d8d7 c1b2 d7g4 f3d3 g4g6 a1e1 d6d5...
by zullil
Sun May 03, 2020 7:09 pm
Forum: Computer Chess Club: General Topics
Topic: Giving up the center
Replies: 27
Views: 2340

Re: Giving up the center

I have a question to a similar position: r1bqkb1r/ppp2ppp/2np1n2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq - 0 6 This can happen out of Philidor or Scotch, so that's very common position on an amateur level. So what's White's best way to continue? I guess many good moves here. Leela favours Bb5, while Sto...