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Originally posted by SwissGambitdid you really think the beef of this thread is whether it's possible to find all 2-move mates with an engine?
I was clearly talking about the Mate in 2 problem the whole time. Thanks for the feeble attempt to lecture on the nature of chess engines, but I'd prefer that you actually read what I say and respond to it next time.
Warm fuzzies,
SG.
it isn't. the beef.
Originally posted by wormwoodYes, it is. The Mate in 2 was the primary example presented in the opening post. It was the only one that got a diagram.
did you really think the beef of this thread is whether it's possible to find all 2-move mates with an engine?
it isn't. the beef.
The OP uncritically repeated Skripchenko's claim that an engine could not solve a simple Mate in 2. It is dead-on topic to examine the merit of this claim.
Originally posted by petrovitchThese are just the ones I already had installed in the Arena GUI. For these engines, I didn't try to find a brute force setting - I just ran them as-is. Of course, the two mate solver engines run in brute force mode as a default condition.
Please, elaborate. What was the engine that could? I think I can; I think I can. And which engines could not solve this problem or others?
Bright 0.3 was a funny one. At depths of 2 to 4 ply, it found the correct mate in 2. However, starting at ply 5 and deeper, it actually switched to a mate in 4. 🙂
The following engines did not find the mate in 2:
Ruffian 1.0.5 (+M4)
Rybka 1.0 Beta 32-bit (the free Rybka)
Toga II 1.3.4 (+M4)
Toga II 1.4 beta 5c (+M4)
The following engines did find the correct mate in 2:
Glaurung 2.0.1
SOS 5.0 for Arena
Spike 1.2 Turin
Toga II Checkov beta 3.1.2SE
Toga II 1.3.1
Toga II 3.1.2.SE
Ufim 8.02
Yace 0.99.87
ChestUCI 4.4 (mate solver engine)
PopeyeUCI 1.5 (mate solver engine)
Originally posted by petrovitchIsn't this one by Sam Loyd (Musical World 1859)?
About a month ago I was doing a post-game analysis with Crafty. When it got to the position where I executed a winning combination I was surprised that Crafty could not find the winning move. Crafty kept insisting on a move that drew instead.
Later, I saw in one of Alexandra Kostiniuk's podcasts in Chess Killer Tips where a simple mate in 2 was prese ...[text shortened]... Mate in 2 by Almira Skripchenko
"Fritz-10 cannot see the winning move."
www.chessqueen.com
Source http://www.xs4all.nl/~dsu/sloyd5.html (No. 39 Mate in 2)
this one:
http://www.chesslodge.com/2008/02/chess-column-im-nikola-karaklajic/
my pocket pc chess engine(about 2400) can not solve...I haven't tried it with some stronger engine, like Fritz10...maybe you want to give it a shot...
also this famous problem:
http://www.chesslodge.com/2008/04/chekhovers-study/
I believe will not be correctly evaluated by an engine...
Maybe some of you can try them with the engines...I think this zwgzwang problems are the biggest pain for engines...
Originally posted by vipiucan someone pls try these links with some strong engine ?
this one:
http://www.chesslodge.com/2008/02/chess-column-im-nikola-karaklajic/
my pocket pc chess engine(about 2400) can not solve...I haven't tried it with some stronger engine, like Fritz10...maybe you want to give it a shot...
also this famous problem:
http://www.chesslodge.com/2008/04/chekhovers-study/
I believe will not be correctly evaluat ...[text shortened]... try them with the engines...I think this zwgzwang problems are the biggest pain for engines...
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Originally posted by vipiu
this one:
http://www.chesslodge.com/2008/02/chess-column-im-nikola-karaklajic/
my pocket pc chess engine(about 2400) can not solve...I haven't tried it with some stronger engine, like Fritz10...maybe you want to give it a shot...
also this famous problem:
http://www.chesslodge.com/2008/04/chekhovers-study/
I believe will not be correctly evaluat ...[text shortened]... try them with the engines...I think this zwgzwang problems are the biggest pain for engines...
1 edit
Originally posted by vipiu
this one:
http://www.chesslodge.com/2008/02/chess-column-im-nikola-karaklajic/
my pocket pc chess engine(about 2400) can not solve...I haven't tried it with some stronger engine, like Fritz10...maybe you want to give it a shot...
also this famous problem:
http://www.chesslodge.com/2008/04/chekhovers-study/
I believe will not be correctly evaluat ...[text shortened]... try them with the engines...I think this zwgzwang problems are the biggest pain for engines...
Didn't know you couldn't post more than one fen per message. 🙂
Originally posted by heinzkatright, someone should try to place them in an engine as I bet an engine would find very difficult to solve them....
1. Rxb3 cxb3 2. g6 Qxg8 3. Kc5 d6+ 4. Kd4 d5 5. Kc5 d4 6. Kxd4 1-0, right? Second one is a fortress position via K=>f2, indeed well-known (solution is also given on the linked web page...)
There is also that Rook sack from one of my old games which most of the engines were not finding because the final mate was very deep...