Search found 723 matches

by JVMerlino
Wed Dec 05, 2018 10:50 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Open Swiss Edition II
Replies: 53
Views: 2585

Re: Open Swiss Edition II

Tough break for Ceibo. Huge blunder in a drawn endgame.

[D]8/5pk1/5r1p/R5p1/P7/2Q3Pq/5P2/6K1 b - - 0 42

42...Qd7?? loses instantly. It's not too often at this level you see an engine's eval jump by more than 7 pawns in a single move.
by JVMerlino
Sun Dec 02, 2018 6:54 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Eight-Headed Monsters IX
Replies: 38
Views: 2257

Re: Eight-Headed Monsters IX

Thanks, Graham! Always fun to watch this one.
by JVMerlino
Tue Oct 23, 2018 9:28 pm
Forum: Computer Chess Club: General Topics
Topic: What was the top Chess engine before it was Stockfish, Komodo or Houdini?
Replies: 58
Views: 4018

Re: What was the top Chess engine before it was Stockfish, Komodo or Houdini?

jpqy wrote:
Tue Oct 23, 2018 7:09 pm
To fill up Steve list a little more..

08-02-1997 Rebel 8.0
09-03-1997 Rebel 8.0
06-05-1997 Hiarcs 6.0
04-09-1997 Hiarcs 6.0
22-02-1998 Fritz 5.0
13-09-1998 Fritz 5.0
28-01-1999 Hiarcs 7.0
28-03-1999 Chessmaster 6000

JP.
Yes, I knew The King was in there somewhere during the mid to late 90's.
by JVMerlino
Thu Oct 18, 2018 5:55 pm
Forum: Computer Chess Club: General Topics
Topic: What got you into computer chess?
Replies: 38
Views: 2708

Re: What got you into computer chess?

I got a Chess Challenger 7 when I was young, and I showed some interest in the game but couldn't find anybody to play with. More than 20 years later I was very fortunate to be placed on the Chessmaster development team, and to stay there for several years/versions (late in the CM5500 dev stage throu...
by JVMerlino
Fri Oct 12, 2018 7:58 pm
Forum: Computer Chess Club: General Topics
Topic: Nice EG fortress
Replies: 10
Views: 1906

Re: Nice EG fortress

I'm not necessarily saying that I trust engines in this kind of study, but 12...Ne8 seems quite inferior to other moves. Every engine I tested shows the score going from at least -8 for Black to near draw with that single move. [D]7k/4N1nq/8/7p/5BbP/8/2p2N2/2K5 b - - 0 12 It's likely that other move...
by JVMerlino
Thu Oct 04, 2018 4:07 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Rebel Book Draw?
Replies: 17
Views: 1661

Re: Rebel Book Draw?

FWIW, I tested several engines on the position before White decided to repeat: r2qr1k1/1bp1bppp/p1np1n2/1p2p3/3PP3/1BP2N1P/PP3PP1/RNBQR1K1 w - - 5 13 The scores ranged between a few cp either side of 0.0 up to +0.5 for White, with the best move being either Nbd2 or a4. Therefore, Black agreeing to r...
by JVMerlino
Wed Oct 03, 2018 5:42 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Rebel Book Draw?
Replies: 17
Views: 1661

Re: Rebel Book Draw?

This is a very well known variation of the Ruy Lopez, even very strong human players repeat moves at this position sometimes. If white wants to win he has to break this repetition, and play something else than Ng5. I guess the human playing white was just satisfied with a draw. When a book is based...
by JVMerlino
Wed Oct 03, 2018 5:07 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Rebel Book Draw?
Replies: 17
Views: 1661

Re: Rebel Book Draw?

Yes, that is what the log file shows. But I definitely said something incorrect. This is the ProDeo book. I assume my implementation is correct, however, in that I simply send a FEN to the book code and if it returns a move I play it. Perhaps I should be checking for repetition moves returned from t...
by JVMerlino
Wed Oct 03, 2018 12:38 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Rebel Book Draw?
Replies: 17
Views: 1661

Rebel Book Draw?

Today, Myrddin played six games on ICC against a human rated ~2150. Myrddin won five of the games, but one was a draw. The curious thing is that all of the moves Myrddin played in that draw were from the Rebel "mainbook" book. [Event "ICS rated blitz match"] [Site "chessclub.com"] [Date "2018.10.02"...
by JVMerlino
Sun Sep 02, 2018 11:03 pm
Forum: Computer Chess Club: General Topics
Topic: Mediocre engines (like mine) v GMs
Replies: 9
Views: 963

Re: Mediocre engines (like mine) v GMs

It's not often that I get to see Myrddin (CCRL rating 2390 on one CPU) play against strong humans. Thankfully, ICC gave me a free membership for a couple of months. There have been five games against humans in the GM category, and Myrddin easily won all of them. I still find this amazing, but perha...