Search found 4087 matches

by Vinvin
Sat Jan 23, 2021 10:40 pm
Forum: Computer Chess Club: General Topics
Topic: Hard positions posted for 6 last moonths
Replies: 31
Views: 6869

Re: Hard positions posted for 6 last moonths

For these 38 positions, 30 minutes search with 1 core with 6 engines. Timing in seconds in the table to find the solution. Empty space means "not found". Solution Corchess-NNUE-1.3 Crystal3.1 SugaR.AI.ICCF.1 CF_EXT_281220 ShashChess15.1 Bluefish-12-W #found AVG time ---------------------------------...
by Vinvin
Fri Jan 22, 2021 1:34 pm
Forum: Computer Chess Club: General Topics
Topic: Questionable positions in the Hard-Talkchess-2020 set
Replies: 22
Views: 2048

Re: Questionable positions in the Hard-Talkchess-2020 set

Why has Nr.192 (.... bm Qxd2 Ng4; id "Hard-Talkchess-2020.192") 1.Ng4 as second solution? 192: Hard-Talkchess-2020.192 r4rk1/pb3pp1/1p1qpR2/2ppN3/3P4/2P4P/PP1pQ1P1/3R2K1 w - - 0 1 Analysis by Crystal 110920 Cry3.0: 1. +- (6.57): 1.Qxd2 Ba6 2.Ng4 Rfc8 3.Qg5 Kf8 4.Rf2 Qe7 5.Qh5 Kg8 6.Ne5 f6 7.Ng6 Qd6...
by Vinvin
Fri Jan 22, 2021 2:23 am
Forum: Computer Chess Club: General Topics
Topic: Questionable positions in the Hard-Talkchess-2020 set
Replies: 22
Views: 2048

Re: Questionable positions in the Hard-Talkchess-2020 set

Revision 2021 to the Hard-Talkchess-2020 set (draft) : I deleted : too easy positions, bad positions, too hard positions. ... 8 more, too easy, deleted. Still 117 : 1B1K1k2/4N2p/3pP1pP/6p1/p7/3N2b1/2r2p2/8 w - - bm Nc6; id "Hard-Talkchess-2020.001" ; 1B1r4/rp2npkp/2b1pbp1/1qp5/nPN1R3/1P1P1QP1/2P2PB...
by Vinvin
Fri Jan 22, 2021 12:51 am
Forum: Computer Chess Club: General Topics
Topic: positions when humans are stronger than engines
Replies: 18
Views: 1369

Re: positions when humans are stronger than engines

1rb3k1/rp1p1ppp/pPpP4/P1P5/8/8/8/K5BB w - - 0 1 Hopefully the following position is good enough. sting also blunder by bxa7 C-Fish after play Kb2 after 3h41m on an i7-6 cores (10 Mnodes/sec) see the long log under. With 3 best lines, It drops bxa7 after 5 seconds. FEN: 1rb3k1/rp1p1ppp/pPpP4/P1P5/8/...
by Vinvin
Fri Jan 22, 2021 12:12 am
Forum: Computer Chess Club: General Topics
Topic: Hard positions posted for 6 last moonths
Replies: 31
Views: 6869

Re: Hard positions posted for 6 last moonths

I took all the positions posted in this thread, I let 4 SF-mod solved them. I selected the hardest positions (still 38) : 1b2r1r1/5p1k/3pb1pB/2pnP1Q1/q2P1N2/p1P5/1p3PP1/1R2R1K1 w - - bm Re4; 1k5r/pbq2p2/4pP2/p1P3P1/5P1r/2p1Q3/P3B1P1/3R1RK1 w - - bm Rb1; 1k6/6Bq/b6p/2p2p2/1pPp3r/pP1Pb3/P1K3Q1/6Rr w -...
by Vinvin
Thu Jan 21, 2021 11:10 pm
Forum: Computer Chess Club: General Topics
Topic: Questionable positions in the Hard-Talkchess-2020 set
Replies: 22
Views: 2048

Re: Questionable positions in the Hard-Talkchess-2020 set

Revision 2021 to the Hard-Talkchess-2020 set (draft) : I deleted : too easy positions, bad positions, too hard positions. It still have doubt about 4 positions. See at bottom. 128 positions left in the set (until now) : ... Still doubts about 4 positions : 10) Rd6xf6 -> A lot of moves are winning. ...
by Vinvin
Thu Jan 21, 2021 12:14 am
Forum: Computer Chess Club: General Topics
Topic: Questionable positions in the Hard-Talkchess-2020 set
Replies: 22
Views: 2048

Re: Questionable positions in the Hard-Talkchess-2020 set

Revision 2021 to the Hard-Talkchess-2020 set (draft) : ... Still doubts about 4 positions : 10) Rd6xf6 -> A lot of moves are winning. But only Rxf6 gives a forseable mate. This position will probably stay. 15) h2-h4 -> Some other moves are close in eval : Bd2, Be3, h3 150) Bd4-f6 -> Qh6 is very clo...
by Vinvin
Mon Jan 18, 2021 1:26 pm
Forum: Computer Chess Club: General Topics
Topic: Crystal 3.1
Replies: 28
Views: 2606

Re: Crystal 3.1

Why is Bluefish-FD-XI with 181/213 not included in the calculation? I guess he looked at the thread count and saw something nefarious. If I ask for 1 thread and 4 threads are pounding like mad, then something is up. It's more the fact that Bluefish-FD-XI is very weak compare to other engines : http...
by Vinvin
Mon Jan 18, 2021 2:18 am
Forum: Computer Chess Club: General Topics
Topic: Questionable positions in the Hard-Talkchess-2020 set
Replies: 22
Views: 2048

Re: Questionable positions in the Hard-Talkchess-2020 set

Revision 2021 to the Hard-Talkchess-2020 set (draft) : I deleted : too easy positions, bad positions, too hard positions. It still have doubt about 4 positions. See at bottom. 128 positions left in the set (until now) : 1B1K1k2/4N2p/3pP1pP/6p1/p7/3N2b1/2r2p2/8 w - - bm Nc6; id "Hard-Talkchess-2020.0...
by Vinvin
Sun Jan 17, 2021 6:31 pm
Forum: Computer Chess Club: General Topics
Topic: Hard Puzzles found on Gameknot
Replies: 52
Views: 8587

Re: Hard Puzzles found on Gameknot

I ran Crystal 2.0 with MultiPv=3 and at depth 38... 5K2/2p3p1/Q2r2P1/3P4/1P5B/7p/pp4pr/kn4Rb w - - 0 1 Crystal 2.0: --------------------------------------------------------------------------- 38 1:09:45 30,272,645k 7,232k +M15 1.Qd3 c5 2.Ke7 Rb6 3.d6 c4 4.Qe2 c3 5.Bf6 Rxb4 6.d7 Rb7 7.Qc2 Ra7 8.Qxc3...