Search found 1393 matches

by Ajedrecista
Wed Aug 21, 2019 2:37 pm
Forum: Computer Chess Club: General Topics
Topic: FEN's for other games
Replies: 7
Views: 192

Re: FEN's for other games.

Hello: Thanks, Harm, now we are getting somewhere. I appreciate your input. I think the FEN standard can work. * You indicate empty squares separately, instead of combining a contiguous range and write their number I had corrected my post to change the "--" to a 2. It appears the main decision is to...
by Ajedrecista
Thu Aug 15, 2019 7:45 pm
Forum: Computer Chess Club: General Topics
Topic: Test Position: Baburin-Adianto, Liechtenstein 1993
Replies: 12
Views: 824

Re: Test Position: Baburin-Adianto, Liechtenstein 1993.

Hello Vincent: The first one: [D] q1r1k2r/1b3pp1/p3pn2/P1b5/1pN1P2p/3B1P2/1P2Q1PP/R1B2R1K b k - That Still a good position in 2019 : Nh5! Threatening the sacrifice Ng3+! It is a good position for sure! Even at this position: [d]q1r1k2r/1b3pp1/p3p3/P1b5/1pN1P2p/3BBPn1/1P2Q1PP/R4R1K w k - 4 22 It is n...
by Ajedrecista
Tue Jul 30, 2019 6:34 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: best way to determine elos of a group
Replies: 51
Views: 4012

Re: best way to determine elos of a group

Hello: Here is the full ratings table with error bars: http://scorpiozero.ddns.net/scorpiozero/nets-1/ratings.txt Hmm, I looked over the data and items aren't obvious to me. 1 ID-146 557 46 46 200 55.8% 504 35.5% My guess is: Rank -- ID -- Elo -- ?? -- ?? -- Number of Matches -- Win Percent? -- Elo-...
by Ajedrecista
Sat Jul 27, 2019 12:52 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: You gotta love Perft... just not too much!
Replies: 11
Views: 1796

Re: You gotta love Perft... just not too much!

Hello Martin: FWIW, here are JetChess perft counter results: ------------------------ First position: [d]8/ppp3p1/8/8/3p4/5Q2/1ppp2K1/brk4n w - - 11 7 8/ppp3p1/8/8/3p4/5Q2/1ppp2K1/brk4n w - - 11 7 1 Qf3-e4 1 2 Qf3-d5 1 3 Qf3-c6 1 4 Qf3*b7 1 5 Qf3-g4 1 6 Qf3-h5 1 7 Qf3-e2 1 8 Qf3-d1 1 9 Qf3-f4 1 10 Q...
by Ajedrecista
Sun Jul 21, 2019 12:21 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Self-taught AI solves Rubik's cube
Replies: 20
Views: 1506

Re: Self-taught AI solves Rubik's cube.

Hello Sven: I think the speedcubing numbers are way too large, I have more confidence in the Wikipedia numbers . The speedcubing approach sees a 3x3x3 cube (for instance) as consisting of 27 pieces that can be moved. But in reality there is one "invisible" piece in the middle that is irrelevant, and...
by Ajedrecista
Sat Jul 20, 2019 7:48 pm
Forum: Computer Chess Club: General Topics
Topic: What's up with this endgame?
Replies: 56
Views: 3140

Re: What's up with this endgame?

Hello: 8/3b2k1/1p3pp1/3p1p2/3P1P2/P3P3/5KP1/5B2 b - - At depth 100/187 SF dev finally shows +2.96 with analysis contempt on (c=24 so real eval is probably around +3.2 is my guess). So this might just be mate in N from this position. I doubt that this position is a win for White. Black should simply ...
by Ajedrecista
Sat Jul 20, 2019 12:18 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Self-taught AI solves Rubik's cube
Replies: 20
Views: 1506

Re: Self-taught AI solves Rubik's cube.

Hello Peter: [...] It would be very interesting to know if their algorithm could actually be trained to learn how to solve a 17x17x17 cube. The state space is very large. Just the inner pieces can be arranged in (24!/4!^6)^56 ~= 10^868 ways. My guess is that their algorithm cannot solve 17x17x17 cub...
by Ajedrecista
Fri Jul 19, 2019 5:24 pm
Forum: Computer Chess Club: General Topics
Topic: Math question
Replies: 34
Views: 2539

Re: Math question.

Hello: Given the big difference of played games of the 'Big Four' (43.18%, 36.48%, 10.57% and 8.08%), I obtain plausible weights IMHO although the math is not so simple. You can tweak the parameters z and a . z ~ 1.96 or z = 2 are pretty standard, but a is more subjective and susceptible of being te...
by Ajedrecista
Thu Jul 18, 2019 6:10 pm
Forum: Computer Chess Club: General Topics
Topic: Math question
Replies: 34
Views: 2539

Re: Math question.

Hello again: Taking the same idea than in my previous post , but using the lower bound of Wilson score interval of µ (without or with continuity correction) instead of µ, I obtain the following weights with your data: Opening Book : books\elo2700.bin Positions : 716.101 Book Weight Score Depth Learn...
by Ajedrecista
Wed Jul 17, 2019 7:22 pm
Forum: Computer Chess Club: General Topics
Topic: Math question
Replies: 34
Views: 2539

Re: Math question.

Hello Ed: I worked a little in an own method which could be unsound but gives some results that may suit your needs: For each i-th opening move: n_i = w_i + d_i + l_i µ_i = (w_i + 0.5*d_i)/(w_i + d_i + l_i) q_i = µ_i * (n_i)^a Weight_i = q_i / SUM(q_i) // SUM(Weight_i) = 100% Using your input values...