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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 3 OF 3 ·  Later Kibitzing>
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.

Oct-29-10  doubledrooks: <Boerboel Guy>: Funny video!
Oct-29-10
Premium Chessgames Member
  chrisowen: VEry fLuid isnt it, great attack pLay mOderato black nf5 zappar tit I on nc5? Picks hes like feeding a donkey strawberries! Off raise rxe6 and cramp said Gabriel swiss hole parts king angelic some just desserts not castling. On long spoon rf6 is cherub a rd6 swinging in. Three step shUffle ke7 qd7 kf8 diskman slipped Gaehwiler knight coy. Other practice developing ment an safe king Mr verve 2250 preaches?
Oct-29-10  scormus: <Jim> 19 Qb7! Yes, even better
Oct-29-10  gofer: Crafty doesn't like the following...

:-)

19 Qg4 e5 20 Qg7+ Ke6 21 f4 Rf8 22 Qxh7 Rf7 23 Qh3+ Ke7 24 g4 Rc8 25 g5 Qc7 26 gxf6+ Rxf6 27 Qh7+ Kf8 28 Qxf7 Rxf7 29 fxe5 dxe5 30 Rxe5 Rf2 31 c3 Rxh2 32 Re6 b5 33 c4 a5 34 Re5 a4 35 Rf1+ Kg7 36 Rg5+ Kh6 37 Rg3 axb3 38 Rxb3 Rxc4+ 39 Kb1 Rg2 40 Rf6+ Kg7 41 Rb6 Kc7 42 R3xb4 Rxb4 43 Rxb4 Ke6 44 Rd4 winning

Oct-29-10  rapidcitychess: Hmm. Rxe6 really busts black's center. This reminds me of a thematic sacrifice in the Najdorf. It usually happens whenever black is forced to not castle.

It looks thematic...

Oct-29-10  gofer: 19 Qb7 Kf8 20 Rxe6 Rc8 21 Rdxd6 Qc7 22 Qe4 ...

Crafty commits suicide with Qxc2+ losing a whole rook! But why? Well the best alternative loses a queen for a rook, so losing a whole rook is not as bad...

Oct-29-10
Premium Chessgames Member
  fm avari viraf: As if White was Fischer-Sozin teaching poor Gaehwiler the lethal attack of Martial Arts.
Oct-29-10  tacticalmonster: 1) Black threatens to trade queen

2) The seventh rank has no pawn protection. Black king is extremely exposed and only the Black queen offer some sort of protection

3) d6 and e6 pawn are weak. The e6 pawn, in particular are under heavy fire by White's major pieces

4) The h8 rook is temporily " trapped "

Candidate: 20 Qe4 and 20 Rxe6+

a) with the move 20 Qe4 I hope I can transfer my queen to the queenside to do some damage but after 20 Rd8 I cannot find a way to continue

b) 20 Rxe6+ Qxe6 ( forced or otherwise Black will be mated) 21 Qg7+ Kd8 ( 21 Ke8 22 Qxh8+ win the a8 rook or 21 Qf7 22 Re1+ win the Black queen) 22 Qxh8+ Qe8 23 Qxf6+ Kc8 24 Qxd6- White is easily winning: 1) superior minor pieces 2) up three pawns 3) exposed black king position

Oct-29-10  wals: I went for 20.Rxe6+ Qxe6 21.Qg7+ Kd8
etc.

Analysis Rybka 4 x 64

depth 17 : 6 min :
Black blunder
(+2.11):11...Nc5. Best, 0.00, =-0.15,
Bb7, =0.06.

depth 17 : 4 min :
Black blunder
(+4.27):16...Kxe7 is best. Next best,
Be6, +4.40.

depth 22 : 65 min :
Black blunder
(+18.64):18...fxe6. Best, Rc8, +4.40.

depth 20 : 5 min :
White blunder
(+2.78):19.Qg4. Best, Qb7+, +18.64.

depth 20 : 3 min :
Black blunder
(+4.92):49...Qg8. Best, e5, +2.78.

and Black hit the track move 23.

Oct-29-10  timothee3331: <Patriot> If there wasn't that beautiful sacrifice there would still be some kind of move like 21.Qh3 but even the rook ending might be winning. That's why it really seemed unnatural to calculate. But then if i just saw the position on the board after 20...Kf7 i would probably be able to devise the rook sacrifice, after all i already dit it once, why couldn't i make it twice ?!
Oct-29-10  timothee3331: But may i ask my <QUESTION FOR ALL THE GOOD WILLS> another time ?

Does somebody know how to publish some kind of <APPLET ON FACEBOOK> ?

I would be sincerely grateful....

Oct-29-10  Fezzik: I agree with many of the other posters. Today was quite a bit easier than the usual Friday puzzles. I spent an extra few minutes making sure I didn't miss anything because I knew it was a Friday puzzle. In that sense, it felt almost like a game!
Oct-29-10  WhiteRook48: I immediately tried 20 Rxe6+ it just seemed the most natural move, somehow. Easier than most Fridays
Oct-29-10  hedgeh0g: Not hard at all. Even without calculating all the variations (of which there aren't that many), it is clear that 20.Rxe6+! wins at least a pawn with a crushing attack.
Oct-29-10  M.Hassan: <jim> Certaily agree! 19.Qb7+ was the best move and not 19.Qg4
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