| Jun-29-06 | | notyetagm: Unbelievable. A 2676-rated near super-GM misses a one-move tactic! White To Play: 21 ?
click for larger viewBlack (Sokolov), once rated 2700 has just committed the obscene blunder 20 ... ♖he8??. What is wrong with this natural move? When Black castled with 19 ... 0-0-0, he castled into a <PIN>. By castling queenside Black <SELF-PINNED> his e6-knight to his Black c8-king. The Black e6-knight has to <BLOCK> the h3-c8 diagonal of the White f5-bishop to meet the threat of ♗x♔. Hence this <PINNED> knight cannot also <DEFEND> the Black g7-bishop. Therein lies the problem. With 20 ... ♖he8??, Black did absolutely nothing to meet the threat of 21 ♕xg7!, winning a whole piece by exploiting the absolute <PIN> of the Black e6-knight. <The defensive power of a pinned piece is merely illusory>, Nimzowitsch said. The Black e6-knight, fully <PINNED> to the h3-c8 diagonal, only -pretends- to defend the Black g7-bishop. Black resigned after 21 ♕x♗! since he has just lost a whole piece for nothing. Amazing to see a near 2700-rated GM blunder a whole piece to a simple one-move tactic while not in time trouble (move 20!). |
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| Jun-29-06 | | notyetagm: Not a good week for strong GMs with the simple <PIN> tactic. Just a few days ago in Shirov vs Areshchenko, 2006, Shirov blundered two pawns(!) to a simple <LATERAL PIN> (52 ... ♖xd5! 53 ♗f3xd5?? ♕g3x♕e3). |
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| Jun-29-06 | | notyetagm: I misannotated this game.
The real blunder by Black (Sokolov) is 19 ... 0-0-0?? since he loses a piece after 20 ♕xf7! to the <DOUBLE ATTACK> against the Black e6-knight and g7-bishop by the White queen. 20 ... ♖he8 is then as good as any other move. |
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| Jun-30-06 | | siggemannen: Don't think he missed that pin exacly rather he didn't see any better choice. Sokolov thought about an hour on O-O-O, i think he just felt he was lost and tried to get his king out. It's hard to prevent 20.Rd1 etc, black has nothing.
The whole plan with g6 seems rather slow in a sharp opening like the open rui, but i'm not a theory buff. Maybe someone who knows open rui better can tell where black's error was. |
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| Jun-30-06 | | notyetagm: <siggemannen> Good explanation. My first thought when I saw the Black fianchetto plan was that it was too slow in this open position and I turned out to be right. |
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Jun-30-06
 | | Sneaky: < Unbelievable. A 2676-rated near super-GM misses a one-move tactic!> You can't call 20... Rhe8 a blunder, because all other moves lose as well. The real error came much earlier. |
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| Jul-01-06 | | notyetagm: <Sneaky> Yes, I realize that. I later said the blunder was 19 ... 0-0-0 but having reflected some more on this game it appears the real error was the idea of fianchettoing with ... g6, which appears to be just to slow in this open position. |
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| Jul-01-06 | | acirce: <notyetagm> 10..g6 can hardly be the losing move, but I think it is indeed dubious. It loses time, and g6 becomes a target for the f4-f5 push, weakening Black's position as seen in this game as well as the WCh game Karpov vs Korchnoi, 1978 |
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Jul-01-06
 | | Open Defence: <be the losing move> the problem with choosing an inferior variation at the top level is that very often you are left with no play at all... so in a sense 10..g6 was the culprit though it is not exactly "losing" |
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| Jul-01-06 | | notyetagm: <Open Defence: <be the losing move> the problem with choosing an inferior variation at the top level is that very often you are left with no play at all... so in a sense 10..g6 was the culprit though it is not exactly "losing"> Yes, that is exactly what I meant by "losing move". Obviously Black does not have to resign after 10 ... g6?! but his position becomes very hard to play after this dubious move. So it is in this sense that 10 ... g6?! "loses the game". |
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| Jul-02-06 | | siggemannen: I wonder, is something like: 11...Nxd4 12.cxd5 nxb3 13.Q/Nxb3 Bg7 better? it seems to give black an inferior position that's true, because of the c-pawn and black's bishops bites the granite, but at least they hold up the position together. Or even try 13... c5 without fianchetting and threat g6 as a move holding up against the possible f4-f5. The problem i see with these variations is that g6 is almost a wasted move, a move played when it's not yet demanded, but which allows white to build dangerous attack.
I'm not sure about the current state of open rui, but at least in the 80's it seemed to be pretty good for white, with karpov crushing Korchnoi ,who was the main expert on the opening. |
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| Jul-02-06 | | MichaelJHuman: By move 13, black had moved the same knight three times. That seems like a flawed plan to me. |
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Jul-28-06
 | | LIFE Master AJ: There are some nice annotations to this game on the "World Chess Academy" website. (http://www.worldchessacademy.com/le...) |
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Kibitzing
