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Very Hot Topic (More than 25 Replies) C57: Two Knights 5...Nxd5 (Read 78958 times)
MNb
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Re: Two Knights 5...Nxd5
Reply #55 - 03/30/10 at 23:33:00
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Not based on the file Master Om provided.
I don't know the analysis by Wind in Kaissiber 29.
  

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Stefan Buecker
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Re: Two Knights 5...Nxd5
Reply #54 - 03/30/10 at 22:52:08
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MNb wrote on 03/30/10 at 21:17:11:
6.d4 Be6 7.Nxe6  [...] Conclusion: neither is 5...Nxd5 a refutation (even 6.Nxf7/9.Qe4 holds its own) nor does it guarantee equality.

But 6. d4 Be6 7.Nxe6 is equal. Your logic is, well, surprising.
  
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MNb
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Re: Two Knights 5...Nxd5
Reply #53 - 03/30/10 at 21:17:11
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Another line that is not equal (sorry, only today I had the time to like at the second file) is 6.d4 Be6 7.Nxe6 fxe6 8.dxe5 Bc5 9.Qg4 Qd7 10.Nc3 0-0 11.f4 Ncb4 12.Bb3 Kh8 13.Nxd5 Nxd5 14.Bd2 Nxf4 and now simply 15.0-0-0. All other features of the position being more or less in balance White is somewhat better (but not much, because the knight is well placed) due to the pair of bishops.

The fact that you evaluate 8...Nxe5 (iso 8...Bc5) 9.Qh5+ Ng6 10.0-0 Qd7 as equal as well indicates that you need something like Grooten's excellent Chess Stragety for Club Players. Without books like these I would not be able to find the weak spots in your lines.

Conclusion: neither is 5...Nxd5 a refutation (even 6.Nxf7/9.Qe4 holds its own) nor does it guarantee equality.
  

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Markovich
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Re: Two Knights 5...Nxd5
Reply #52 - 03/30/10 at 18:42:28
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So say it, but also defend the chess of what you say.  Don't just point to the machine's evaluation, please.  I'm not trying to squelch your point of view in a chess discussion; just talk chess.
  

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Master Om
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Re: Two Knights 5...Nxd5
Reply #51 - 03/30/10 at 18:35:22
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Markovich wrote on 03/30/10 at 18:06:40:
Master Om wrote on 03/30/10 at 17:20:44:
Markovich wrote on 03/29/10 at 15:21:59:
I am very sorry for encouraging the digression with one of my own posts, but I will permit no more in this thread that concerns the merits and limits of computerized analysis.  I have transferred to a new thread in "General Chess" all of the posts here that seemed chiefly to concern that.

Furthermore I am quite put off by argumentation of the form "my infallible computer sez...".  So put off, in fact, that I have gone back and deleted all argumentation of this form from Master Om's posts. He seems to be the only one arguing this way here.  Master Om, if you want to talk about chess positions, by all means do so here.  But talk about the actual chess; the piece activity, the pawn structure, the king safety, whatever the hell, but do not seek to justify your opinions by citing your infallible computer.  Any more posts containing that sort of argumentation will be summarily deleted.  If your computer is correct, then there is some actual chess behind it, and it is that, not your computer's opinion, that you should be supplying here.

I sometimes feel terrible when someone doesnot tend to understand and thinks like a Railway Track. As you are moderator here you cant still supress the truth do you ?
I said this to Bucker who (with kind regards ) tends to understand and also I am again saying to you. [ Text in all caps redacted by Markovich. ]
So he did with Chess in mind not CA in mind.I posted Chess and not 'My Infallible Comp says". You better ask him about these. I myself agree what marteen de zeeuw said whose perspective differs from what BPaulsen's otherwise Maarten de Zeeuw's Analysis was on NIC and not of BPaulsen's . That was Not my Analysis. I only Checked.

last but not the least:- As you wish! . Sorry i cant wake a Sleeping man who actually not sleeping acts like it. Sorry.


It's quite simple.  If you have something to say about the chess of 5...Nxd5, including any number of variations backed up by whatever silicon or protoplasmic computational power you want to use, it's perfectly fine to say it here.  What I will not accept is anyone's bald refusal to talk chess in defense of any given evaluation, insisting instead on argumentation of the form "my super duper machine thought for 17 hours and it says this."  Say that by all means, but also say something about the chess.  If I permitted that kind of argumentation, it would inevitably result in every thread degenerating into a discussion of the value of computers in chess analysis, something that belongs in General Chess, not here.  And this thread did indeed thus degenerate, resulting in many of the posts being moved to General Chess.

So here, talk some chess, not exclusively about your super duper chess engine.

I deleted your other post, which was blantanly and flagrantly off-topic.

Ok but still i have to say on what basis my analysis was on and this is forced.
  

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Markovich
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Re: Two Knights 5...Nxd5
Reply #50 - 03/30/10 at 18:06:40
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Master Om wrote on 03/30/10 at 17:20:44:
Markovich wrote on 03/29/10 at 15:21:59:
I am very sorry for encouraging the digression with one of my own posts, but I will permit no more in this thread that concerns the merits and limits of computerized analysis.  I have transferred to a new thread in "General Chess" all of the posts here that seemed chiefly to concern that.

Furthermore I am quite put off by argumentation of the form "my infallible computer sez...".  So put off, in fact, that I have gone back and deleted all argumentation of this form from Master Om's posts. He seems to be the only one arguing this way here.  Master Om, if you want to talk about chess positions, by all means do so here.  But talk about the actual chess; the piece activity, the pawn structure, the king safety, whatever the hell, but do not seek to justify your opinions by citing your infallible computer.  Any more posts containing that sort of argumentation will be summarily deleted.  If your computer is correct, then there is some actual chess behind it, and it is that, not your computer's opinion, that you should be supplying here.

I sometimes feel terrible when someone doesnot tend to understand and thinks like a Railway Track. As you are moderator here you cant still supress the truth do you ?
I said this to Bucker who (with kind regards ) tends to understand and also I am again saying to you. [ Text in all caps redacted by Markovich. ]
So he did with Chess in mind not CA in mind.I posted Chess and not 'My Infallible Comp says". You better ask him about these. I myself agree what marteen de zeeuw said whose perspective differs from what BPaulsen's otherwise Maarten de Zeeuw's Analysis was on NIC and not of BPaulsen's . That was Not my Analysis. I only Checked.

last but not the least:- As you wish! . Sorry i cant wake a Sleeping man who actually not sleeping acts like it. Sorry.


It's quite simple.  If you have something to say about the chess of 5...Nxd5, including any number of variations backed up by whatever silicon or protoplasmic computational power you want to use, it's perfectly fine to say it here.  What I will not accept is anyone's bald refusal to talk chess in defense of any given evaluation, insisting instead on argumentation of the form "my super duper machine thought for 17 hours and it says this."  Say that by all means, but also say something about the chess.  If I permitted that kind of argumentation, it would inevitably result in every thread degenerating into a discussion of the value of computers in chess analysis, something that belongs in General Chess, not here.  And this thread did indeed thus degenerate, resulting in many of the posts being moved to General Chess.

So here, talk some chess, not exclusively about your super duper chess engine.

I deleted your other post, which was blantanly and flagrantly off-topic.
  

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Re: Two Knights 5...Nxd5
Reply #49 - 03/30/10 at 17:20:44
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Markovich wrote on 03/29/10 at 15:21:59:
I am very sorry for encouraging the digression with one of my own posts, but I will permit no more in this thread that concerns the merits and limits of computerized analysis.  I have transferred to a new thread in "General Chess" all of the posts here that seemed chiefly to concern that.

Furthermore I am quite put off by argumentation of the form "my infallible computer sez...".  So put off, in fact, that I have gone back and deleted all argumentation of this form from Master Om's posts. He seems to be the only one arguing this way here.  Master Om, if you want to talk about chess positions, by all means do so here.  But talk about the actual chess; the piece activity, the pawn structure, the king safety, whatever the hell, but do not seek to justify your opinions by citing your infallible computer.  Any more posts containing that sort of argumentation will be summarily deleted.  If your computer is correct, then there is some actual chess behind it, and it is that, not your computer's opinion, that you should be supplying here.

I sometimes feel terrible when someone doesnot tend to understand and thinks like a Railway Track. As you are moderator here you cant still supress the truth do you ?
I said this to Bucker who (with kind regards ) tends to understand and also I am again saying to you. [ Text in all caps redacted by Markovich. ]
So he did with Chess in mind not CA in mind.I posted Chess and not 'My Infallible Comp says". You better ask him about these. I myself agree what marteen de zeeuw said whose perspective differs from what BPaulsen's otherwise Maarten de Zeeuw's Analysis was on NIC and not of BPaulsen's . That was Not my Analysis. I only Checked.

last but not the least:- As you wish! . Sorry i cant wake a Sleeping man who actually not sleeping acts like it. Sorry.
  

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Markovich
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Re: Two Knights 5...Nxd5
Reply #48 - 03/29/10 at 16:30:06
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Uruk wrote on 03/29/10 at 16:12:27:
Markovich wrote on 03/29/10 at 15:21:59:

I will permit no more in this thread that concerns the merits and limits of computerized analysis.  I have transferred to a new thread in "General Chess" all of the posts here that seemed chiefly to concern that.


Actually, isn't this thread supposed to be about the Fritz variation ?
The whole Fried Liver discussion should have been split some pages ago.


Yes, you're right.  I'm not always paying critical attention, so if something like that comes up and someone feels strongly about it, I'd appreciate a PM.
  

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Re: Two Knights 5...Nxd5
Reply #47 - 03/29/10 at 16:12:27
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Markovich wrote on 03/29/10 at 15:21:59:

I will permit no more in this thread that concerns the merits and limits of computerized analysis.  I have transferred to a new thread in "General Chess" all of the posts here that seemed chiefly to concern that.


Actually, isn't this thread supposed to be about the Fritz variation ?
The whole Fried Liver discussion should have been split some pages ago.
  
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Re: Two Knights 5...Nxd5
Reply #46 - 03/29/10 at 15:49:37
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BPaulsen wrote on 03/27/10 at 21:27:04:
With all due respect, some of the evaluations make zero sense positionally (and they wouldn't to any master level player, I suspect), I'll give one example from Om's analysis (and there are more from what I can already tell, but this is for starters to highlight the problem - there's a number of similar positions where black has the isolated Pe6 and white has the bishop pair that he calls equal):

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. d4 Be6 7. Nxe6 fxe6 8. dxe5 Nxe5 9. Qh5 Ng6 10. 0-0 Qd7 

This position is not equal no matter what angle you look at it from even though he already calls it that, white has the B pair and black has a  chronic weakness sitting on e6. Black doesn't have any significant dynamic factor that off-sets these.

However, if you continue further into what Om gives you get this horrific continuation - 11. Nc3 0-0-0 12. Rd1 c6 13. Nxd5 (deserves an "?!") exd5 - of course black's equal, white for some unknown reason as decided to fix black's structure and blunt his bishop pair in the process. Why is this move the main one given? Computers like it even though it's questionable strategically.



Master Om, have you responded to BPaulsen's fundamental critique here?  I mean, the chess, and not his aside about the value of computerized analysis, which I have not quoted?

I suggest you do, with reasoning about the chess of given positions.
  

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Re: Two Knights 5...Nxd5
Reply #45 - 03/29/10 at 15:21:59
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I am very sorry for encouraging the digression with one of my own posts, but I will permit no more in this thread that concerns the merits and limits of computerized analysis.  I have transferred to a new thread in "General Chess" all of the posts here that seemed chiefly to concern that.

Furthermore I am quite put off by argumentation of the form "my infallible computer sez...".  So put off, in fact, that I have gone back and deleted all argumentation of this form from Master Om's posts. He seems to be the only one arguing this way here.  Master Om, if you want to talk about chess positions, by all means do so here.  But talk about the actual chess; the piece activity, the pawn structure, the king safety, whatever the hell, but do not seek to justify your opinions by citing your infallible computer.  Any more posts containing that sort of argumentation will be summarily deleted.  If your computer is correct, then there is some actual chess behind it, and it is that, not your computer's opinion, that you should be supplying here.
  

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Re: Two Knights 5...Nxd5
Reply #44 - 03/29/10 at 08:25:25
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Vladimir wrote on 03/29/10 at 08:11:15:
Perhaps we should move away from the defensiveness, dogmatism, and derailment of the thread. 

Instead of dismissing moves summarily, we should take them seriously and try to do so analytically. Is Black really equal after  13.Nxd5 exd5? What about after 14.Bd3 Qf7 15.Be3 Kb8 16.c4?

I might be missing something obvious, but it didn't seem as blatantly ridiculous at second glance.


Fair enough.

In the PGN black's considered = (then again the same is said on move 9).

Even in the line you mentioned after 16...Bd6 black may still be slightly worse, admittedly, meaning the problem with the analysis may very well be less 13. Nxd5 (which is still questionable) but the follow-up 14. Be2.
  

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Re: Two Knights 5...Nxd5
Reply #43 - 03/29/10 at 08:11:15
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Perhaps we should move away from the defensiveness, dogmatism, and derailment of the thread. 

Instead of dismissing moves summarily, we should take them seriously and try to do so analytically. Is Black really equal after  13.Nxd5 exd5? What about after 14.Bd3 Qf7 15.Be3 Kb8 16.c4?

I might be missing something obvious, but it didn't seem as blatantly ridiculous at second glance.
  
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Re: Two Knights 5...Nxd5
Reply #42 - 03/29/10 at 02:29:58
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SWJediknight wrote on 03/29/10 at 00:15:31:
Is there a specific engine which is supposed to be good in these Two Knights lines?  I note that Fritz tends to agree with most of the PGN's assessments in the 6.d4 lines, but regards some of the play as sub-optimal (e.g. Kaissiber 29's suggested improvement 12.Nc3! over the old 12.Na3 is given by Fritz as best after about five seconds' thought, assessing it as +=).  

But in contrast, Fritz goes further than my "roughly equal" assessment of the lines I gave after 9.Qe4 and 9.0-0 in the Fried Liver, often giving "+=" or even "+/-".


Try this position and tell me wheteher anyengine finding the move.
8/1p6/1Pp2N1q/p1Ppk2p/P3p3/3PPpPp/3K1P1P/1R6 w - - 0 1
  

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Re: Two Knights 5...Nxd5
Reply #41 - 03/28/10 at 13:14:55
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Stefan Buecker wrote on 03/28/10 at 06:06:38:

Thank you very much for the explanation regarding your source. I am glad that you are willing to share your analysis. If you are interested to receive a free copy of Kaissiber #29, just send me a PM with your address. I believe the line 6.d4 is well chosen for a thorough checking with a multicore, since most of its lines don't require the deep positional understanding of a GM.

I should thank you rather as i am fan of yours the way you do your analysis. I have lots of my own analysis to share specially on sicilian and e4e5 systems. Thanks for kassiber 29 offer .I would definitely analyse on that
« Last Edit: 03/29/10 at 15:46:49 by Markovich »  

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