Search found 1481 matches

by Ajedrecista
Tue Oct 20, 2020 4:41 pm
Forum: Computer Chess Club: General Topics
Topic: Looking for solutions with predicted variations for these...
Replies: 36
Views: 8007

Re: Looking for solutions with predicted variations for these...

Hello: ChestUCI.epd mates that I do not have a worked out solution for: 4K2k/rr2p1R1/1p4BB/1p3pp1/4p1P1/pb1p4/2n5/1n5R w - - bm #46; 00:36+ @ C2/R0/K3/P4/X7; seen this one published as #46, but Crystal found a M41. 4K2k/rr2p1R1/1p4BB/1p3pp1/4p1P1/pb1p4/2n5/1n5R w - - 0 1 [...] Chest 5.2 with C2/R0/K...
by Ajedrecista
Mon Oct 19, 2020 7:00 pm
Forum: Computer Chess Club: General Topics
Topic: Looking for solutions with predicted variations for these...
Replies: 36
Views: 8007

Re: Looking for solutions with predicted variations for these...

Hello: ChestUCI.epd mates that I do not have a worked out solution for: 8/p3p2p/p4p2/p3b3/Pp6/kP6/Pp5N/1K6 w - - bm #39; 00:23+ @ C2/R0/K1/P4/X16; I didn't see a solution published for this one...so here is one offering. 8/p3p2p/p4p2/p3b3/Pp6/kP6/Pp5N/1K6 w - - 0 1 [...] This problem is listed in YA...
by Ajedrecista
Fri Oct 16, 2020 6:59 pm
Forum: Computer Chess Club: General Topics
Topic: Funny positional piece sacrifice
Replies: 5
Views: 477

Re: Funny positional piece sacrifice.

Hello: Possible continuation in the Carlsen Tari game. See -> https://youtu.be/lOzbuVz7SbI?t=2576 Thank you for the source. Answering Peter, my intention was giving a sequence of moves that reaches the position although any transposition of the sequence could be valid, so my line was a proposed line...
by Ajedrecista
Thu Oct 15, 2020 6:42 pm
Forum: Computer Chess Club: General Topics
Topic: Funny positional piece sacrifice
Replies: 5
Views: 477

Re: Funny positional piece sacrifice.

Hello: Does this position come from a real game? The best I could work by myself with not many suboptimal moves is the following ECO C84 line: [Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "?"] [Black "?"] [Result "*"] [PlyCount "25"] 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O B...
by Ajedrecista
Sat Oct 10, 2020 5:52 pm
Forum: Computer Chess Club: General Topics
Topic: CCRL flawed testing : SF12 above SF12 8CPU
Replies: 59
Views: 2880

Re: CCRL flawed testing: SF12 above SF12 8CPU.

Hello Kai: Third and hopefully last attempt with the minimum draw ratio D_min. The other two are wrong. It is easy to check that +122 =0 -78 after 200 games translates into +77.7 Elo and the draw ratio is zero, so D_min. is nor 20.43% neither 10.22%: Elo_diff. ~ 77.7 Elo after 200 games. Possible ou...
by Ajedrecista
Fri Oct 09, 2020 5:16 pm
Forum: Computer Chess Club: General Topics
Topic: CCRL flawed testing : SF12 above SF12 8CPU
Replies: 59
Views: 2880

Re: CCRL flawed testing: SF12 above SF12 8CPU.

Hello Kai: Very nice! His result was 78% draws, very close to your likely 75%. And his wins : losses was 44 : 0, quite telling W/L and an associated Elo compression. I found a typo in my formula for D_min. The true value is: /* WRONG IN MY PREVIOUS POST: score = 1/[1 + 10^(-Elo_diff./400)] = W + D =...
by Ajedrecista
Thu Oct 08, 2020 7:10 pm
Forum: Computer Chess Club: General Topics
Topic: CCRL flawed testing : SF12 above SF12 8CPU
Replies: 59
Views: 2880

Re: CCRL flawed testing: SF12 above SF12 8CPU.

Hello Kai and Alayan: What was the draw rate? Your openings favor huge draw rates and compress Elo differences. Can you write WDL numbers? [...] I saw SF 12 8CPU with zero losses vs the 1 core after 60+ games but I don't know the final results. Anyway, 8CPU had a huge win:loss ratio. While we wait M...
by Ajedrecista
Fri Oct 02, 2020 6:53 pm
Forum: Computer Chess Club: General Topics
Topic: Busted French line?
Replies: 12
Views: 1068

Re: Busted French line?

Hello: This weird move can lead to even weirdest positions, like in Árnason - Petrosian of 1983: Árnason - Petrosian (Tallinn, 1983) [Event "4th Keres Memorial"] [Site "Tallinn URS"] [Date "1983.03.??"] [EventDate "?"] [Round "14"] [Result "1/2-1/2"] [White "Jon Loftur Arnason"] [Black "Tigran Varta...
by Ajedrecista
Thu Oct 01, 2020 5:30 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: "Opening Books" for Endgames
Replies: 6
Views: 745

Re: "Opening Books" for Endgames.

Hello Andrew: Fishtest allows to download PGNs of the workers during a short period of time, let's say four days or so. Currently, the oldest test where I can download PGNs is this one: https://tests.stockfishchess.org/tests/view/5f7232ee3b22d6afa50699a2 Please take a look at Idx column. However, I ...
by Ajedrecista
Thu Sep 24, 2020 7:08 pm
Forum: Computer Chess Club: General Topics
Topic: Test position in the gothenburg variation
Replies: 5
Views: 534

Re: Test position in the Gothenburg variation.

Hello: From New In Chess yearbook 125 page 58. The Gothenburg variation resurrected?! 8/6k1/1p1rb3/1Q3n2/8/8/PPP4P/2K5 b - - 0 36 Positional evaluation +1 for white 14. e5 is the latest inovation in this line. [Event "Chapter - 10"] [Site "https://lichess.org/RLiscdUi"] [Date "????.??.??"] [Round "?...