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by zullil
Sun May 10, 2020 10:12 am
Forum: Computer Chess Club: General Topics
Topic: Sting SF 21
Replies: 15
Views: 1179

Re: Sting SF 21

Hi Louis, It's a part of this Study: [Event "?"] [Site "?"] [Date "1832.??.??"] [Round "?"] [White "Mendheim=J"] [Black "?"] [Result "1-0"] [SetUp "1"] [FEN "rkr5/p5p1/Pp4Kp/8/3B4/1B6/8/8 w - - 0 1"] [PlyCount "13"] [EventDate "1832.??.??"] 1. Be5+ Rc7 2. Be6 b5 3. Bd7 b4 4. Kf7 b3 5. Ke8 {<or>}(5....
by zullil
Sat May 09, 2020 2:31 pm
Forum: Computer Chess Club: General Topics
Topic: Sting SF 21
Replies: 15
Views: 1179

Re: Sting SF 21

The "IQ" test is a very important part of my project (Sting) and doesn't contain middle-game tactical positions and technical endgames. Here are positions dedicated to all engines to test so-called by me "quasi-intelligent" their abilities. Don't use such external tricks like: rule-50 changing, nul...
by zullil
Sat May 09, 2020 12:05 pm
Forum: Computer Chess Club: General Topics
Topic: Tough Tactical Test 1
Replies: 46
Views: 2271

Re: Tough Tactical Test 1

Not in a minute, but less than 10! Critter v1.6a 64-bit, by Richard Vida info multipv 1 depth 28 seldepth 68 nodes 17039203814 time 562026 nps 30317465 hashfull 1000 tbhits 0 score cp -5 pv e5g6 h7g6 d4g7 e6g7 a1g7 h8h7 d3d4 d8d6 g7f6 d6d7 f6e5 e8f8 c2c3 f8d8 c3d2 d8a8 d2c3 d7f7 c3d2 a8c8 d2e2 f7d7...
by zullil
Sat May 09, 2020 12:05 am
Forum: Computer Chess Club: General Topics
Topic: Tough Tactical Test 1
Replies: 46
Views: 2271

Re: Tough Tactical Test 1

Dann Corbit wrote:
Fri May 08, 2020 11:31 pm
I don't remember what engine I used, but it took several hours to solve it, wish I had tried critter!
Yes, critter is coded to detect some types of blocked positions:

TwoSided bool Evaluator::pawn_blockage()

TwoSided bool Evaluator::detect_fence(Bitboard sqmask)
by zullil
Fri May 08, 2020 10:47 pm
Forum: Computer Chess Club: General Topics
Topic: Tough Tactical Test 1
Replies: 46
Views: 2271

Re: Tough Tactical Test 1

This is the most difficult problem with no solvers at one minute with 32 cores at 4 GHz : 3rr1bk/6np/2p1n3/1pPpNpPp/pP1QpP1P/P2PP3/2K5/B7 w - - acd 85; bm Ng6+; c3 "Ng6+"; c9 "difficulty 854, hits 0, misses 14"; ce 0; pm Ng6+; pv Ng6+ hxg6 Qxg7+ Nxg7 Bxg7+ Kxg7 d4 Rd7 Kb1 Bf7 Kb2 Be6 Kb1 Ree7 Kb2 R...
by zullil
Fri May 08, 2020 1:13 pm
Forum: Computer Chess Club: General Topics
Topic: Leela (lack of) endgame technique?
Replies: 25
Views: 4754

Re: Leela (lack of) endgame technique?

Garry Kasparov vs Deep Blue (Computer) · 1-0 Match (1996), Philadelphia, PA USA, rd 6, Feb-17 https://www.chessgames.com/perl/chessgame?gid=1070879 SF-dev, D=62 +6,31 21.Bxh7+ Kxh7 22.Ng5+ Kg6 23.Qg4 Nf5 24.Nxe6+ Kh7 +4,94 21.b4 dxc4 22.bxa5 Nd5 23.Re2 c3 24.Bxc3 Nxc3 <---- Kasparov +2,15 21.c5 Bc7...
by zullil
Fri May 08, 2020 11:20 am
Forum: Computer Chess Club: General Topics
Topic: Leela (lack of) endgame technique?
Replies: 25
Views: 4754

Re: Leela (lack of) endgame technique?

info depth 12 seldepth 36 time 44348 nodes 408349 score cp 215 wdl 827 97 76 nps 11477 tbhits 0 pv b3b4 a5c7 b4b5 c6a5 b1h7 g8h7 f3g5 h7g6 d1g4 f7f5 h4h5 g6h6 g4h4 e7g8 e3e6 g8f6 c4d5 a5b3 c1e1 d8e8 g5f3 h6h7 h5h6 e8e6 d5e6 d7d5 h6g7 h7g7 h4g5 g7h7 g5f6 d5f3 b4 or c5 lines (also winning lines, as w...
by zullil
Fri May 08, 2020 10:31 am
Forum: Computer Chess Club: General Topics
Topic: Leela (lack of) endgame technique?
Replies: 25
Views: 4754

Re: Leela (lack of) endgame technique?

Garry Kasparov vs Deep Blue (Computer) · 1-0 Match (1996), Philadelphia, PA USA, rd 6, Feb-17 https://www.chessgames.com/perl/chessgame?gid=1070879 SF-dev, D=62 +6,31 21.Bxh7+ Kxh7 22.Ng5+ Kg6 23.Qg4 Nf5 24.Nxe6+ Kh7 +4,94 21.b4 dxc4 22.bxa5 Nd5 23.Re2 c3 24.Bxc3 Nxc3 <---- Kasparov +2,15 21.c5 Bc7...
by zullil
Thu May 07, 2020 2:21 pm
Forum: Computer Chess Club: General Topics
Topic: Giving up the center
Replies: 27
Views: 2338

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
Wed May 06, 2020 6:18 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?

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 ...