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Alberto Miatello vs Gabriel Gaehwiler
Biel MTO (2010), Biel, Switzerland, rd 2, Jul-20
Sicilian Defense: Fischer-Sozin Attack. Flank Variation (B87)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 3 ·  Later Kibitzing>
Oct-29-10  Dr. J: I'm having a great week so far - not only have I solved every puzzle, but I saw all of the solutions almost immediately. Except that one of those statements is a lie - I blew the Monday (yes, Monday!) puzzle! (The rest is true, though, so, on balance, still a great week.)
Oct-29-10  estrick: Queen sac on e6 doesn't look promising. But just like yesterday, leading with a rook sac instead works.
Oct-29-10
Premium Chessgames Member
  agb2002: The material is even.

Black threatens 20... Qxg4.

The white pieces aim at the black king.
The obvious move is 20.Rxe6+:

A) 20... Qxe6 21.Qg7+
A.1) 21... Qf7 22.Re1+ + -.
A.2) 21... Ke8 22.Qxh8+ and 23.Qxa8 + -.
A.3) 21... Kd8 22.Qxh8+ Qe8 23.Qxf6+ and 24.Qxd6 + -.

B) 20... Kf7 21.Rxf6+
B.1) 21... Kxf6 22.Rxd6+ and mate soon.
B.2) 21... Ke7 22.Qf4 + -.
B.3) 21... Ke8 22.Qe4+ Kd7 23.Qb7+ and mate soon.

C) 20... Kd7(8) 21.Rexd6+ is a massacre.

Oct-29-10  nuwanda:

rather easy difficult puzzle today...

Oct-29-10  gofer: 20 Rxe6+ ...

20 ... Kd7/Kd8 21 Rexd6+ mate in two more
20 ... Kf7/Kf8 21 Rxf6+! (Kxf6 Rxd6+ mating) Kd7 22 Qf5 and white is in winning easily mate in 4?

Main Line

20 ... Qxe6
21 Qg7+ Kd8 (Qf7 22 Re1+)
22 Qxh8+ Qe8 (Kc7 23 Qxa8)
23 Qxf6+! Kc8
24 Qxd6 and black is completely dominated

Time to check...

Oct-29-10  scormus: <Once: <rilkefan> Try this:>

Thanks, I can use that too

Nice to see CG doing some Najdorf. Nice to have one today I could get after missing yesterday's R-sac

Oct-29-10  JG27Pyth: Well, Rxe6 Kf7 Qxg8 and I'm confident I can win the ending :P
Oct-29-10  imreker: So I spotted 20. Rxe6+ and 20...Qxe6 21. Qg7 either drops the Queen (21...Qf7 22. Re1+) or both Rooks (21...Kd8/e8 22. Qxh8+). Never even pondered around not accepting the sac, since it loses more pawns (but, as the game shows, it also leads to even uglier ramifications).
Oct-29-10  scormus: Interesting to see the players ratings. A finely played game by W (really just 2001?). Although the R-sac is not difficult to find, the key move seems to be 19 Qg4. Not sure if there is a defense - I have not yet found one.
Oct-29-10  timothee3331: does somebody know how we can put an applet (java or other) on facebook so that we can share our games or others' ? For myself, i stopped at 1.Rxe6+ Qxe6 2.Qg7+ and did not look at the current line at all, was it really necessary ?!
Oct-29-10  cocker: I agree with previous comments. White needs only look at 20 ... ♕xe6. If Black doesn't take the rook he is surely lost.
Oct-29-10  Bonifratz: Today may have been a bit easy for a Friday, but I'm still proud to say that I found the solution and saw pretty much every important line (something I rarely accomplish on Fridays). :)
Oct-29-10  Marmot PFL: Aren't they supposed to get harder as the week goes on :)? They seem to be going the other way. Maybe Sat will be a real killer.
Oct-29-10  Marmot PFL: I would have thought that by 2010 the main lines of the Najdorf would be sufficently known to masters that such disasters in the opening would not occur. Or at least that a 2200+ player seeing rooks on e1 and d1 would think about getting his king away from those files. Shows what I know I guess.
Oct-29-10  desiobu: I agree that this was a bit light for a Friday. Once you see the initial Rxe6 tactic there are too many ways to win with such dominating rooks.
Oct-29-10  Patriot: I calculated:

20.Rxe6+

A) 20...Qxe6 21.Qg7+

A1) 21...Qf7 22.Re1+ winning the queen

A2) 21...Kd8 22.Qxh8+ Qe8 23.Qxf6+

A3) 21...Ke8 22.Qxh8+ and 23.Qxa8

B) 20...Kd8 21.Rexd6+

C) 20...Ke8 21.Rxf6+

D) 20...Kd7 21.Rexd6+

E) 20...Kf7 22.Rxf6+! Kxf6 23.Rxd6+ Kf7 24.Qd7+ Kf8 25.Rxf6+

On variation E, I spent a moment looking at 22.Qh5+ Kxe6 and the attack seems to lose steam. Therefore I didn't spend much time on that.

<timothee3331> <For myself, i stopped at 1.Rxe6+ Qxe6 2.Qg7+ and did not look at the current line at all, was it really necessary ?!>

Usually I'm the one talking about when to stop analyzing. This is definitely an important skill to develop that will help you save time during a game. Sometimes it seems that people are over-analyzing in obviously winning positions (like "beating a dead horse") but usually it's done to practice board vision or winning technique.

In this position, declining the rook was of interest because after 20...Kf7, black is saying "Now what are you going to do with your queen?" Resolving the issue with 21.Qxg8+ Rxg8 can't be right because now white's rook is hanging and so is the pawn on g2. 22.Rxd6 Rxg2 gives black counterplay. The position is still critical and unresolved so looking further IS necessary here unless you're in a position like this during a speed game or in a low time issue.

Oct-29-10  Sololoy: "<Once>: upon a time, in a land forever at war, there was a king who hid behind a wall."

I really disfruted reading your post. I could imagine how much you must enjoy writing. It is nice. Hope you go on writing like that from time to time.

Oct-29-10  Patriot: <CHESSTTCAMPS> I played out the position (Monday's) against Crafty and you're right...it isn't easy even after winning the knight. I basically played blitz against it and could get nothing more than a draw after several tries. The problem seemed to be that it was difficult to get even trades and I was probably too forceful about it. Black needs to play aggressively (dynamically) and white needs to pay more attention to what black can do to prevent counterplay and go for even trades whenever suitable and win by attrition. That's the general recipe. Against strong chess programs it isn't always that easy. I don't remember the material imbalance but if white was down a pawn for a piece, black only needed to grab another pawn for white to be barely winning with no margin for error. Black very likely resigned too early there.
Oct-29-10  njchess: Pretty easy puzzle for a Friday. Even if you ignore this week's rook sac theme, and even if you don't count solving it by simply getting the first move Rxe6+, the followup moves to the solution are pretty obvious.

I must admit that when I first saw Black's pieces arranged in this position, I thought I was looking at a diagram from a puzzle book.

Oct-29-10
Premium Chessgames Member
  Once: <Boerboel Guy> Now that was a funny video, and good to see that the dog was really enjoying himself. Thanks!
Oct-29-10
Premium Chessgames Member
  keypusher: <Once: <Boerboel Guy> Now that was a funny video, and good to see that the dog was really enjoying himself. Thanks!>

Agree. But those were some pretty desolate neighborhoods.

Oct-29-10
Premium Chessgames Member
  kevin86: I saw that black was either going to lose his queen or two rooks. In the text,he loses everything.
Oct-29-10  howlwolf: this week has been too easy. I have seen the answer to every problem in an instant.
Oct-29-10
Premium Chessgames Member
  Jimfromprovidence: <scormus> <Although the R-sac is not difficult to find, the key move seems to be 19 Qg4. Not sure if there is a defense - I have not yet found one.>

Go a bit further back in your thinking. 19 Qg4 is not even the best move. 19 Qb7+ is.


click for larger view

Now, 19...Kf8 (only move) 20 Rxe6 (seeing 21 Rxd6) looks really good.

I saw the Qb7+ threat last night at the puzzle position as I posted, but I had to spend a tempo to set it up and black could defend. I was one move too late.

Oct-29-10
Premium Chessgames Member
  playground player: When the King becomes "The Naked Prey,"

A mate is only moves away.

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