Search found 1518 matches

by Ajedrecista
Sat Jan 23, 2021 5:45 pm
Forum: Computer Chess Club: General Topics
Topic: Chess Life magazine digital archive
Replies: 2
Views: 153

Re: Chess Life and Chess Review magazines digital archive.

Hello: It is amazing indeed. I did not know that URL, I have used the following FTP-like URL since the last year, when I realised about it: Index of /CL-AND-CR-ALL/ These magazines proved useful when searching old stuff, such as: Re: For my personal research. Re: What engine can solve this puzzles i...
by Ajedrecista
Sun Jan 17, 2021 11:25 am
Forum: Computer Chess Club: General Topics
Topic: Fun Mate in 2
Replies: 7
Views: 285

Re: Fun mate in 2.

Hello: I finally solved it on my own, altough it took me a while. I solved it the old way: with the board and the pieces in front of me, finding counterexamples until I found the good lines. Some moves can be discarded, mainly queen moves that lead to RxQ without further threatens and knight and kin...
by Ajedrecista
Tue Jan 12, 2021 5:34 pm
Forum: Computer Chess Club: General Topics
Topic: Where can i find the net Fin-Finder for Lc0?
Replies: 1
Views: 405

Re: Where can i find the net Fin-Finder for Lc0?

Hello Thomas: At the moment this net plays a match against Stockfish on youtube. Can someone help to find the downloadsite of this strong net? According to the chat of this video on YouTube, it is 'A test setting and NN for Lc0' and 'It is new settings and nn. It is my settings and name' in words of...
by Ajedrecista
Sat Jan 09, 2021 12:16 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: What K factor should be used if two players are in different K factor brackets?
Replies: 3
Views: 684

Re: What K factor should be used if two players are in different K factor brackets?

Hello: I do not know the answer, but I can tell what FIDE (not USCF) did in August 2015. Do you remember the case of John Burke, who achieved a FIDE rating over 2600 Elo being 13 or 14 years old? I searched the rating changes of him and other player with different K. I got Burke (2258 Elo at that ti...
by Ajedrecista
Sun Jan 03, 2021 8:10 pm
Forum: Computer Chess Club: General Topics
Topic: KomodoDragon brilliancy Ruy Lopez - Marshall! A marshall reborn?
Replies: 22
Views: 2043

Re: KomodoDragon brilliancy Ruy López - Marshall! A Marshall reborn?

Hello: [...] I did not find games with 17.- ..., Nf4 in this exact position, but ..., Nf4; gxf4, gxf4 looks like a thematic sacrifice just like RxN (..., Rxc3) in the Sicilian Dragon. [...] The Total Marshall by Harding, Vitomskis and Bennedik states some attacking ideas for black, which can be cons...
by Ajedrecista
Sat Jan 02, 2021 1:21 pm
Forum: Computer Chess Club: General Topics
Topic: KomodoDragon brilliancy Ruy Lopez - Marshall! A marshall reborn?
Replies: 22
Views: 2043

Re: KomodoDragon brilliancy Ruy López - Marshall! A Marshall reborn?

Hello: ok I just checked in my database of Human-Human GM games, 17...Nf4! move is not found, maybe this is a Novelty by engines. Even SF 12 cannot consider this move (17...Nf4!!) . I wonder if KomodoDragon is NNUE or pure NN similar to Lc0, because this is a very different move which is a bit diffi...
by Ajedrecista
Sat Jan 02, 2021 12:24 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Blunder option
Replies: 37
Views: 2708

Re: Blunder option.

Hello Ferdinand: Test game 2, will it mates me? [Event "Computer chess game"] [Site "?"] [Date "2020.12.31"] [Round "?"] [White "ferdi"] [Black "Guided v1.0.0"] [Result "0-1"] [BlackElo "2000"] [ECO "A00"] [Opening "Barnes (Gedult) Opening"] [Time "22:20:17"] [WhiteElo "2400"] [TimeControl "180+2"] ...
by Ajedrecista
Thu Dec 31, 2020 12:22 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Blunder option
Replies: 37
Views: 2708

Re: Blunder option.

Hello Ferdinand: Steinar is right, F is a cumulative function. Regarding my example calculation, you are right: those individual probabilities are correct. My example gives the other values with K = 0.8, but for some reason there is a typo and K = 1 was written instead. I think the cumulative part a...
by Ajedrecista
Wed Dec 30, 2020 12:01 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Blunder option
Replies: 37
Views: 2708

Re: Blunder option.

Hello Ferdinand: I am looking at this: Imagine a position where the evals of all the possible moves from the side to move are: (In pawns): d(i) = eval(i) - eval(best move) = {0, -0.1, -0.2, -0.2, -0.6, -2.9, -4, -4, -4, -9} Prob(i) = 10^[d(i)/K]/SUM{10^[d(i)/K]}, with K > 0 // i = 1, 2, ..., moves -...
by Ajedrecista
Tue Dec 29, 2020 6:26 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Blunder option
Replies: 37
Views: 2708

Re: Blunder option.

Hello Colin: Some people are writing about Multi-PV and I think it is worth a try. I proposed a method back in 2016 which is based in Multi-PV move-picking involving PRNG. I am not aware that anyone has implemented it so far: Re: Skill levels. Re: Strategies for weaker play levels. The second post i...