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DcGentle
Member since Jul-30-12
My career as chess analyst started at the end of the nineties of last century, some years before the famous match of the World Team against Kasparov 1999, where I also participated a member of the Team.

Having studied computer science, I developed an early interest in the algorithms of chess programs, which first appeared in dedicated chess computers and later as PC software.

Using them in correspondence chess, I recognized the limitations of these programs, especially the early PC programs were only strong with short range tactics.

So already to the end of the nineties of last century I thought about writing a chess program of my own, but with different algorithms that would overcome the limitations of contemporary software.

Because I also felt that my own knowledge of chess was not up to the task, I more and more started analysing openings, and I began with the Morra Gambit, because it is tactical and estimated as theoretically weak, which it is, according to current theory. But I found that its theory can be improved, so that White is not forced to lose the tempo gained by the gambit, as with some decisive lines of current theory.

Since then I studied the French, the King's Gambit, the Blackmar Diemer Gambit, the Queens Gambit, and other openings.

But I also analyzed endgames, motivated by a friend who is a renowned chess study composer.

In 2012 I participated in the World Team Game against GM Akobian and studied the Caro-Kann, and later, in 2013, I examined the Larsen opening the same way.

To realize the motivation of writing a chess program from scratch, I wrote a paper about the weaknesses of current chess programs, that you can find online here:
http://www.zenpawn.com/chessblog/20... (PDF: http://www.zenpawn.com/docs/Chesspr...)

So chess is more science and art than sports for me, although also for me it's very interesting to watch the games of today's top grandmasters live. Here one can see the differences of human and computer chess.

Computer chess is not perfect chess, only the endgame tables, which have stored the moves of very few pieces remaining on the board at the end of the game, offer perfect chess today, but no explanations, why a certain move is the best.

And whether chess can be solved in our life time, remains to be seen.

<PGN viewers online>:

Simple, no variations: http://www.caissa.com/chess-tools/p...

General purpose, may not work with all browsers: http://chesstempo.com/pgn-viewer.html

General purpose (click <open>, insert PGN-text, select ParsePgn=4, click <ok>, result in new window) http://www.lutanho.net/pgn/pgnviewe...

Can also edit PGN-text: http://www.chess.com/analysis-board...

>> Click here to see DcGentle's game collections.

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   DcGentle has kibitzed 11674 times to chessgames   [more...]
   Jul-23-14 The World vs Naiditsch, 2014 (replies)
 
...
 
   Jul-20-14 Leko vs Caruana, 2014 (replies)
 
DcGentle: Position after <14. Bf4> [DIAGRAM] Black to move
 
   Jul-19-14 Caruana vs Adams, 2014 (replies)
 
DcGentle: Yes, Caruana's performance in this tournament is very convincing, and this is an understatement.
 
   Jul-18-14 DcGentle chessforum (replies)
 
DcGentle: <john barleycorn>: No, there is no prototype. But I can test some future features of my engine, for example parts of the planned positional play, which consists out of several components. One of them is the restriction of pieces, and this was applied in the above line against
 
   Jul-18-14 Kramnik vs Caruana, 2014 (replies)
 
DcGentle: <IraqSon: May be the match was compromised ?!> No it was not. But a certain opening employed by Kramnik did not go with Kasparov's style.
 
   Jul-16-14 Caruana vs G Meier, 2014 (replies)
 
DcGentle: <artemis: DcGentle: Ok, your first post was after 36. ... h6. 37. Rg1 and then 37. ... Kh7 is the idea. 38. h4 Rg6 39. h5 is deadly then, isn't it?> Yes, you are right, and even with other moves Black could have only delayed the end.
 
(replies) indicates a reply to the comment.

Chess means Analysis

Kibitzer's Corner
< Earlier Kibitzing  · PAGE 38 OF 38 ·  Later Kibitzing>
Jul-03-14
Premium Chessgames Member
  cro777: Hi DcGentle. I new that you were a team player. We must accept that in the team vote chess the decisions are not always rational. I also voted for 1.d4 and 4.0-0.

<kwid> and I are trying to find the best plan in the current position. Your suggestions would be appreciated.

Jul-04-14
Premium Chessgames Member
  DcGentle: <cro777>: Hi!

Well, we should have played <5. Bxc6>, now the move <... d5> is rather annoying in all variants. Currently the engines only find a draw, because the team twice in a row played the worse move, and inaccuracies add up in chess, this is nothing new. But what can you do with voters who have such fuzzy concepts like "complexity" and are afraid of playing an endgame with an advantage, rather forgoing the advantage itself.

It's a lack of chess education which shows up here, and the engines cannot compensate this.

It's a good question whether there is a winning plan for White at this point, after move 5 of White, so early in the game. But 80 (eighty!) SuperGM draws from this position make me rather depressive.

I have not quit the game yet, though.

Jul-08-14
Premium Chessgames Member
  morfishine: Good luck in todays Game vs Brazil! I think the final will be Germany vs Argentina, and that would be a great finale: Both are great ball control, passing teams!
Jul-08-14
Premium Chessgames Member
  DcGentle: <morfishine>: Thank you, it will be hard enough. I hope they'll make it! :-)
Jul-08-14
Premium Chessgames Member
  morfishine: <DcGentle> Yes, Napoleon had the right idea: Concentrate a numerical superiority at the point of attack

And Germany sure did that today vs Brazil!! All of those goals were good goals, nothing cheap. Granted, Brazil was lax at time on defense not marking properly, but too bad. Soccer is both offense and defense. Germany just erased years of misery vs Brazil and I am absolutely thrilled about it!

BTW: I am for your Q-side expansion idea in the WT game. We'll see how well it is accepted.

Jul-09-14
Premium Chessgames Member
  DcGentle: <morfishine>: Well, my impression was that Brasil was shocked by the early goal and collapsed, of course this must not happen if a team wants to become world champion. Tonight we'll see who will be Germany's opponent in the final.

Something to look forward to.

:-)

Jul-10-14
Premium Chessgames Member
  parisattack: <DcGentle: <cro777>: Hi! Well, we should have played <5. Bxc6>, now the move <... d5> is rather annoying in all variants. Currently the engines only find a draw, because the team twice in a row played the worse move, and inaccuracies add up in chess, this is nothing new. But what can you do with voters who have such fuzzy concepts like "complexity" and are afraid of playing an endgame with an advantage, rather forgoing the advantage itself.>

The mathematics of voting is very strange. It is common for the final 'vote' to be less then optimum. Plus in the World game it is not just about finding good chess moves but in how to use an engine effectively - it seems many participating have more of the former skill than the latter.

Jul-10-14
Premium Chessgames Member
  Tiggler: I like 7.a4. Thanks for your research on it.

I like Argentina's chances in the final. Germany will have a hard time coming down to earth, is why.

Jul-12-14
Premium Chessgames Member
  DcGentle: <parisattack> <Tiggler>

Thanks for your support. To be honest, I have a bad feeling now, with all these missed chances of the team. I know what you mean with the concept of engine driver, <parisattack>, unfortunately it's necessary to know a bit of chess to be a good one as well, because the engines are not perfect. This fact is neglected by these people who keep posting engine analysis as early as move 2 or earlier, and then even use the evals as arguments for voting. But our opponent has not only achieved equality now. After <7. Nbd2> he feels completely at home and can search through his games and others in order to avoid earlier mistakes.

It will be extremely hard to get a winning advantage now, if Black doesn't blunder, and why should he? As I already explained, time in chess is the total amount of opportunities during a game, and logically, the longer the game will last, the less opportunities any side will have, this also is one reason, why it's hard to regain an advantage after it was lost. Another logical consequence is the richness of options during the first moves of a game, which naturally decreases once a certain path has been chosen. On the other hand there is an interesting phenomenon in chess, some endgames can be so complicated again, that seeing through them is really about impossible. Fortunately these endgames occur less frequently in tournament chess, but you can admire them on endgame table bases.

Well, back to the game, I like your agreement to <7. a4>, <Tiggler>. If Black decides to kick our bishop b5 twice, he will gain space on the queenside and secure his black squared bishop. White still can play <a4>, but it's for a different reason then.

Well anyways, maybe Germany have a chance on Sunday, we'll see. :-)

(At lest something to look forward too, and I can enjoy the Dortmund live game today, I hope.)

The WT game doesn't need me right now anyways.

Greetings, <DC>

Jul-12-14
Premium Chessgames Member
  Tiggler: <On the other hand there is an interesting phenomenon in chess, some endgames can be so complicated again, that seeing through them is really about impossible.>

I think the Berlin so-called 'end-game' is in this category: quite impenetrable by superficial analysis, or even by long study. It is asymmetrical too, apparently with chances for both sides. To say it is an automatic draw is just plain silly. I wanted to play it for those reasons, and because it is such a big-league challenge.

Jul-12-14
Premium Chessgames Member
  parisattack: <DcGentle> Sometimes you have given examples of where in a position of a game computer analysis fails. Do you have perhaps a catalog or list of such examples?
Jul-13-14
Premium Chessgames Member
  DcGentle: <Tiggler> Well, the Berlin endgame and the queenless middlegame preceding it for sure has a positional quality that makes it hard for current engines to come to any final conclusion. In yesterday's game Naiditsch vs Adams, 2014 Naiditsch missed the win, I am sure, because I analyzed a similar game for my concept about the Belrin Wall. Yes, this would have been something, but it's so challenging...

<parisattack>: What most adherents of current chess software don't know, finding any positions where the engines are clueless is easy.

Firstly: In January I made a study about the positional competence of current engines, which are most often used in correspondence chess. How did I do this? I went over quite some Carlsen games and tested, whether Houdini found the positional moves of this player. The results were not quite encouraging. The study is here (DcGentle chessforum).

Secondly: In my Game Collection: Positional Masterworks you can choose any game, and when going over it with the engine of your choice it will stumble sooner or later, because the human plan is much different from the computer style. And mostly humans are right here, and not the engines.

Thirdly: There is a certain 4 bishop endgame that I solved with <long hard work>, because this will help me very much with my engine. You can find this here: DcGentle chessforum. Current engines are clueless.

All the best,
<DC>

Jul-14-14
Premium Chessgames Member
  morfishine: <DcGentle> World Cup Trophy is back where it belongs: In Europe, or even better: in Germany!

Very satisfying win for Germany what with dispatching both Brazil and Argentina. A great example of system beating style

Jul-14-14
Premium Chessgames Member
  DcGentle: <morfishine>: They said on the radio that not only in Germany people were celebrating, and the French started their fireworks for their National Holiday (which is today) even half an hour early, namely after Germany won the Cup. :-)
Jul-14-14
Premium Chessgames Member
  morfishine: <DcGentle> My brother was working in Paris in 1998 when France won the Cup. He said the fans were delirious and partied literally all week. When he finally went back to work on Wednesday, he said there were still drunk, passed-out people lying along the curbs and gutters, and that was 3 days after the game!

Paris was a mob scene right after the win. My brother had to literally fight his way home as all the streets and side alleys were full of rowdy, drunk people. When he got back to his apartment, there were "50 or 60" people in his backyard who had confiscated the space to cook out and drink all night. Instead of complaining, he joined them :)

*****

Jul-15-14
Premium Chessgames Member
  DcGentle: <morfishine>: Yes, the French know how to celebrate, as it seems. :-)
Jul-15-14
Premium Chessgames Member
  parisattack: <<parisattack>: What most adherents of current chess software don't know, finding any positions where the engines are clueless is easy.

Firstly: In January I made a study about the positional competence of current engines, which are most often used in correspondence chess. How did I do this? I went over quite some Carlsen games and tested, whether Houdini found the positional moves of this player. The results were not quite encouraging. The study is here (DcGentle chessforum).

Secondly: In my Game Collection: Positional Masterworks you can choose any game, and when going over it with the engine of your choice it will stumble sooner or later, because the human plan is much different from the computer style. And mostly humans are right here, and not the engines.

Thirdly: There is a certain 4 bishop endgame that I solved with <long hard work>, because this will help me very much with my engine. You can find this here: DcGentle chessforum. Current engines are clueless.

All the best,
<DC>>

Very, very interesting work! I suppose if you can identify and quantify these 'positional positions' the battle would be at least half over in your pursuit of a new paradigm engine.

Jul-15-14
Premium Chessgames Member
  DcGentle: <parisattack>: Hi! Well, positional play is the backbone of chess, any engine which could really calculate the how-to of this way to play the game would be miles ahead of current software, I am quite sure about it. Current methods will never be able to deal with it, it can become rather deep rather quickly, too deep for any engine running stupidly over the game tree. In order to tackle positional play, new methods are required, and I hope I am on the way.

Planning is the key. Especially Carlsen games often have deep plans. But also the 4 bishop endgame I analyzed cannot be won without a plan. Endgames are more educational, because the themes are easier to identify...

In the normal middlegame anything is more fuzzy. You can have situations, which can be solved with either tactical play or purely positional play, this is really true. But as I see it, tactical play only is a variety of positional play, as strange as this may seem. For people always talked about chess being essentially tactics, and anything which looks strategically or positional would be resolved by tactics in the end, provided that the search is only deep enough. This is wrong, there are very many positions, which cannot be tackled with tactics at all. My understanding is just the other way around, funny, isn't it?

We'll see.

Jul-16-14
Premium Chessgames Member
  DcGentle: Well, the Berlin Wall also belongs to these category of positions which only can be solved by positional play.

A part of the concept against this opening that I presented on the World Team pages, was following line, which was not easy to find and took me quite some time and research efforts:

[Event "Berlin defense analysis"]
[Site "MyTown"]
[Date "2014.06.??"]
[Round "?"]
[White "White"]
[Black "Black"]
[Result "*"]
[ECO "C67"]
[Annotator "Gentle,DC"]
[PlyCount "175"]
[EventDate "2014.??.??"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8 9. Nc3 Bd7 {<Black wants to move his king to c8.>} 10. Rd1 Kc8 11. Ng5 {<attacking f7.>} Be8 {<forced.>} 12. Nge4 {<evading a kick by pawn h7 and covering c5. This move already was applied by Kasparov against Kramnik.>} b6 {< preparing the home for Black's king, b7. This artifical castling takes a lot of time, which can be used by White efficiently.>} 13. a4 a5 {<Black cannot tolerate an attack on pawn b6, with the impact that Black's queenside pawn structure will gat a new hole, namely b5, later.>} 14. b3 {< White wants to develop the bishop to b2.>} Kb7 15. Bb2 Be7 {<Even after Black developed his bishop to e7, this piece has hardly any good squares. Exactly this is White's strategy, make Black's pieces look stupid.>} 16. Rd3 Rd8 17. Rad1 Rxd3 {<forced.>} 18. Rxd3 Kc8 19. f3 {< controlling g4 for a white pawn and clearing a path for the white king.>} Bd7 20. Ne2 c5 21. c4 {<Now Black's queenside pawns are blocked. Because White's pawns are on light squares, the ideal preparation for the endgame is the trade of a knight for Black's light squared bishop.>} Re8 22. Kf2 Bc6 23. g3 {< White is not interested in chasing away the knight yet, because it cannot do much harm there.>} Kb7 24. h4 {<gaining space on the kingside.>} Rf8 {< protecting f7 against a possible knight attack from g5.>} 25. N2c3 h5 (25... Nd4 {<is not so good due to>} 26. Nd5) 26. Ne2 g6 {<The "Open" Berlin defense has become quite closed now, and this is White's intention: Make the white knights dominate the black bishops.>} 27. Nf4 Rg8 28. Ke2 {<helping to guard the d-file.>} Rc8 {<Black is already quite helpless.>} 29. e6 Be8 30. g4 Nd4+ 31. Bxd4 cxd4 32. exf7 Bxf7 33. Rxd4 {< Even after the game opened again, Black's bishops have no good squares.>} Re8 ( 33... Bxh4 {<fails due to>} 34. Rd7 Be8 35. Rg7 hxg4 36. Nd6+ {<winning the rook.>} ) 34. g5 Bd6 35. Nd5 Be5 36. Rd3 c6 37. Ndf6 Re7 38. Rd8 {< If White's pieces can invade, it's the beginning of the end for Black.>} Kc7 39. Rf8 Be6 40. Ne8+ Kb8 41. f4 Bb2 {<forced!>} 42. Kf2 Bh3 43. N8d6+ Kc7 44. Rg8 {< Pawn g6 will fall.>} Bf5 45. Kf3 Bg4+ 46. Kg3 Bd1 47. Rxg6 {< White has not won yet, but the rest is technique.>} Bc2 48. Kf3 Bd1+ 49. Ke3 Bc1+ 50. Kd3 Bxf4 51. c5 bxc5 52. Nc4 Bxb3 53. Nxc5 Bxc4+ 54. Kxc4 Bd6 55. Rh6 Re5 56. Ne6+ Kd7 57. Nd4 Re4 58. Kd3 Rg4 59. Rxh5 Bg3 60. Rh7+ Kd6 61. Nf3 c5 62. h5 c4+ 63. Kc2 Rf4 64. Nd2 Rf2 65. Kd1 Kd5 66. g6 Bf4 67. Rd7+ Ke6 68. Rd8 Bh6 69. Nxc4 Rf5 70. Ra8 Rxh5 71. Ra6+ Ke7 72. Ke2 Kf8 73. Rxa5 Rh4 74. Kd3 Kg7 75. Ra6 Rh3+ 76. Ke4 Rh4+ 77. Kd5 Rh5+ 78. Ne5 Bf4 79. Ra7+ Kg8 80. Re7 Bd2 81. Ke6 Rh4 82. Ra7 Be3 83. Ra8+ Kg7 84. a5 Ra4 85. Kd5 Bf2 86. Kd6 Bd4 87. a6 Bxe5+ 88. Kxe5 {<is a endgame table base win for White>} *

By the way, I applied positional concepts like restriction of pieces here, which I also want my engine to use.

Ģ

Jul-16-14
Premium Chessgames Member
  cro777: <DpGentle: You can have situations, which can be solved with either tactical play or purely positional play, this is really true.>

Here is the most recent try to explain the relationship between these two concepts.

http://www.thelifestrategic.com/201...

Jul-17-14
Premium Chessgames Member
  DcGentle: Thanks for this interesting link <cro777>! I agree with many things the author said, but especially in chess one has to differentiate between strategy on the one side, and positional play and tactical play on the other.

For example in our WT game one strategy at move 7 would have been "queenside expansion". This is a synergistic chess principle, gaining space on the queenside.

But once you have recognized that this could be a viable strategy, you have to examine the means at your disposal. These means are mainly pawn moves grabbing space. But one consequence would have been, that Black's dark squared bishop would have been pushed back and would have emerged as a prime target for restriction, which is part of positional play. And here we see it: Positional play is a means to realize a strategy, tactics also belongs to the tool box of strategy realization.

But both sides, the tools and the overall principle depend on each other. Without the proper positional or tactical play no strategy can be realized, and it's hard to find a strategy in the first place, if no tools are available. Sometimes it also can be hard to find a strategy, if some tools are around, but they are in conflict with each other, or if many tools are around, and then you have to do a selection.

Strategy is a high level abstraction is chess. My engine will try to "decipher" chess positions in order to find the proper strategy and plans realizing it.

Ģ

Jul-17-14
Premium Chessgames Member
  john barleycorn: <My engine will try to "decipher" chess positions in order to find the proper strategy and plans realizing it.>

Out of curiosity, at which stage are you with the development of your engine?

Are you using already a prototype when srutinizing lines in the world vs. Naiditsch game?

Jul-18-14
Premium Chessgames Member
  DcGentle: <john barleycorn>: No, there is no prototype. But I can test some future features of my engine, for example parts of the planned positional play, which consists out of several components. One of them is the restriction of pieces, and this was applied in the above line against the Berlin Wall. But it's only the method, there is no software involved. Methods must be clear, otherwise you cannot construct an algorithm.

If the total algorithm is finished and not too complicated, it can be simulated by humans even without an actual computer at hand. I wrote a short article <What is an algorithm?> --> mistermac chessforum and the ensuing sample is so easy, you can try this on a sheet of paper. In 1951 Alan Turing devised a first chess program algorithm without having the necessary computer at hand and simulated this in a game against a colleague. <kingcrusher> made a video about this game, which you can watch here: http://www.youtube.com/watch?v=CrLb....

My algorithm is not finished, and so I couldn't simulate the whole system, but I could simulate parts of it. My program is much more complicated than current programs, which have a simple search compared to mine.

Jul-18-14
Premium Chessgames Member
  john barleycorn: ok, thanks.
Jul-21-14
Premium Chessgames Member
  notyetagm: <waustad: Rapport won with a mate in 5 in the first round of the Politiken Cup. Here is an ephemeral link:>

Egads, it's not a <MATE IN 5>, it's a mate *on* move 5(!).

My first chess teacher was an advocate of the <BUDAPEST GAMBIT> with Black. He was *always* trying to get this mate with reversed colors whenever he had to play a fish.

:-)


click for larger view

4 ...Nb8-d7??


click for larger view

5 Ne4-d6#! 1-0


click for larger view

[White "Rapport, Richard"]
[Black "Rogers, Tim L"]
[Result "1-0"]
[Round "01"]
[Date "Mon Jul 21 2014"]
[WhiteClock "1:31:00"]
[BlackClock "1:25:00"]

1. e4 c6 2. Nc3 d5 3. Qe2 dxe4 4. Nxe4 Nd7 5. Nd6# 1-0

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