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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.

Thanks, Graham! Always fun to watch this one.

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.

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...

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...

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...

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...

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...

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"...

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...