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Zenon Franco Ocampos vs Amine Alawieh
Seville op (1992), Seville ESP, rd 7, Jan-??
Semi-Slav Defense: Stoltz Variation (D45)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Dec-22-10  Quentinc: What's White's best after the "obvious" 23...fxe6? I see a few ways for White to go up two pawns (e.g., 24.Nxc6 Qf7 25. Nxd8 Rxd8 26. Qxg6+). Hmmm... but now I'm thinking 25. Nh8 ...Qc7 26. Qg6+ Kf8 27. Qxh6+ Kg8 28. Qxe6+ Kf8 29. Ng6#.
Dec-22-10  LIFE Master AJ: Both 21.Re6 and 21.Rg4 look devastating. (21.Qc3 also looked very good.)

I went with Re6, just because it looked so shocking ... almost like "give-away."

Dec-22-10  LIFE Master AJ: If Black plays 24...PxR/e6; I calculated in mate in like eight or nine moves ... can anyone verify this? (My computer works fine, but my back is bothering me, I can only sit like 10 minutes at a time.)
Dec-22-10
Premium Chessgames Member
  Once: Can you hear the music?

It doesn't happen often - maybe one game in a hundred - but just sometimes a game or a position cries out for a musical accompaniment.

And in today's puzzle position, I am thinking the theme from Jaws. It's the menacing threat of the bishops on b1 and b2, like shark fins breaking the surface of the sea. The Bb1 and Qc2 taking aim at the swimmer on g6. Then finally the killer shark coming right up to the beach with 21. Re6.

Black's pieces are huddled on the beach by the queenside. And all that Amity has to defend itself are the police chief, fisherman and a marine biologist - aka a couple of pawns and the black Qf8. And you just know that at least one of them is going to end up as a shark snack.

Didn't see 21. Rg4. Instead, 21. Re6 seemed natural and strong - piling up more pressure on g6. M'learned colleagues have supplied the analysis, so I'll bring the choon...

http://www.youtube.com/watch?v=ZvCI...

Dec-22-10  M.Hassan: "Medium/Easy" White to play 21.?
White is a pawn down
White has two excellent Bishops, Queen, a Rook and a Knight that can attack Black's camp. He can start by:

21.Re6 <if...fxe6 22.Qxg6+ Qg7 23.Qxg7#> 21..........Nd5 trying to obstruct the diagonall of the DSB 22.Nxd5 Bxd5
23.Bxd5 f6
24.Rxf6 <...Qf7 25.Rxg6+ Qxg6 26.Qxg6+ and Black Q is lost> 24............Qd8
25.Rxg6+ Kf7
At this stage, I think White wins. he is a Bishop and a pawn up.Black can prologe the loss by resistance and the game may continue as below: 26.Qf5+ Ke7
27.Bc6+ Rxc6
28.Re1+ Re6
29.Rexe6+ Kd8
30.Rxe8+ Kxe8
31.Rg8+ Ke7
32.Qe5+ Kf7
33.Rg7+ Kf8
34.Qe7#
Time to check
--------------
I can say "more or less" the same

Dec-22-10
Premium Chessgames Member
  Phony Benoni: After <24...fxe6>:


click for larger view

Here's one nine-move sequence:

<1.Qxg6+ Qg7 2.Qxe6+ Kh8 3.Nf7+ Kg8 4.Nxh6+ Kh8 5.Nf7+ Kg8 6.Nd6+ Kh8 7.Rh4+ Qh6 8.Qxh6+ Kg8 9.Rg4#>

Kind of funny. In the diagram, each side has one piece on the kingside, three on the queenside. Gives a whole new meaning to the phrase, "Relative Value of the Pieces."

Dec-22-10
Premium Chessgames Member
  agb2002: White is a pawn down.

Black threatens 21... dxe4.

The black castle is weak and poorly defended. White attacks g6 twice through the rook on e4. Therefore, move it to attack g6 three times with 21.Re6 (21.Rg4 Qd6 followed by Nf6 or Nf8):

A) 21... fxe6 22.Qxg6+ Qg7 23.Qxg7#.

B) 21... Kh7 22.Rxg6 f6 (22... fxg6 23.Qxg6#) 23.Rxh6+ and mate next.

C) 21... f5 22.Rxg6+

C.1) 22... Kh7 23.Qxf5 Qxf5 24.Bxf5 (threatens Rg4#) Rf8 25.Rg7+ Kh8 26.Rxd7+ Kg8 27.Rg7+, etc.

C.2) 22... Kf7 23.Qxf5+ wins.

D) 21... f6 22.Qxg6+ Qg7 (22... Kh7 23.Qh7#) 23.Qf5 with many threats: Rd4-g5, Bxf6, Rde1 followed by Re7 or Re8, etc. However, White cannot lose sight of ... d4 and ... c5 because Black's queen and LSB aim at g2.

Dec-22-10  4tmac: Check about #10 due to 28. ..Kf8(!) getting an eventual ...Bxh2+?
Dec-22-10  Arindam Banerjee: I had to think for 5 minutes before i got this!!!! I agree with phony benoni and others about Rg4 too....its a good looking move!!!
Dec-22-10  eblunt: 21. ♖g4 ♕d6 seems to hold for black - I couldn't seem to find a good way through for white after that.

In the text 22 .... f6 might be worth a try for black. Seems to prevent the iminent mate, but after Qxg6+ black still loses several pawns and he's losing.

Dec-22-10
Premium Chessgames Member
  Sastre: <eblunt> White is still winning after 21.Rg4 Qd6 22.Qc3 Qf6 23.Qxf6 Nxf6 24.Bxf6.
Dec-22-10  eblunt: <Sastre> and after < 21.Rg4 Qd6 22.Qc3 f6 > ? black loses the g and h pawns after 23.Rxg6+, black swings his own rooks across and has a bit of fight still left, though probably losing.
Dec-22-10  Patriot: I quickly wanted to play 21.Rg4 but saw the defensive 21...Qd6 so I turned to 21.Re6, since 21...fxe6 22.Qxg6+ Qg7 23.Qxg7#.

For defense, I looked at 21...Ne5 22.Bxe5 Bxe5 23.Rxe5 . I also considered 21...Kh7 22.Rxg6 which has to be winning for white.

I didn't consider 21...d4, which is an improvement on my 21...Ne5 idea. This is because after 21...d4 22.Bxd4 Ne5 23.Bxe5? Rxd1+ becomes a major distraction and a good way for white to lose.

------

Now that I've seen some of the comments, 21.Rg4 may be winning as well. I spent much less time on this move only because 21.Re6 seemed to be superior. It had the same idea as 21.Rg4 but without 21...Qd6 as a possible defense. This is an example of "When you see a good move, look for a better one." The only problem with 21.Re6 is that you have to be extra careful about black's defense. He may get in position where the rook can simply be taken if not careful. 21...d4 22.Bxd4 Ne5 is an example. If I had noticed this I may have reconsidered 21.Rg4 and thought it through more carefully.

Dec-22-10
Premium Chessgames Member
  patzer2: For today's Wednesday puzzle, calculating the initial move with 21. Re6!, which demolishes White's helpless King position, was fairly easy because of the obvious mate threat 21...fxe6 22. Qxg6+ Qg7 Qxg7#.

However, finding the best moves in the declined lines takes a bit more skill.

For example, <Life Master AJ>'s calculation of a mate in nine moves after 24...fxe6 (not exactly novice calculation after 21. Re6!!) is pretty accurate, as Fritz 10 gives it as a mate-in-ten after 24. Rxd4 fxe6 25. Qxg6+ Qg7 26. Qxe6+ Kh8 27. Nf7+ Kg8 28. Nxh6+ Kf8 (28...Kh8 29. Nf7+ Kg8 30. Nd6+ Kf8 31. Rf4+ Qf6 32. Qxf6+ Kg8 33. Rg4#) 29. Rd7 Qxd7 30. Qf6+ Ke8 31. Bg6+ Qf7 32. Qxf7+ Kd8 33. Qe8+ Kc7 34. Qe7#.

Earlier, it is helpful for white to see that if 21...Ne5 or 21...Be5, the best move is not 22. Rxe5 (winning slowly), but, instead, 22. Nxe5! with a strong attack.

If 21...f6, the strongest reply is not the seemingly obvious 22. Qxg6+ , but instead 22. Rde1! with a much stronger attack.

Another possible blind spot for White after 22...Ne5 is in seeing that 23. Nxe5! is clearly the strongest move. Significantly weaker is 22. Rxe5?! to (though it appears to be winning slowly), while 22. Bxe5? Rxe1+ (throwing away the win and giving the advantage to Black) is practically a blunder.

P.S.: Somewhat surprisingly, the computer gives 22. Rxd4! as stronger than 22. Bxd4 , but this is one where I think the human calculation makes more sense in sticking with 22. Bxd4 .

Dec-22-10  VincentL: "Medium/Easy".

The first move that catches my eye is 21 Re6.

On (a) 21.....fxe6 22. Qxg6+ Qg7 23. Qxg7 mate

What are the alternatives for black?

(b) 21.....Re8 22. Rxg6+ exf6 23. Qxg6+ and the finish is as in (a).

(c) 21....f5 22. Rxg6+ Kf7 23. Qxf6+ Ke8 24. Re1+ and loss of material + mate follows

(d) 21....f6. Now I am struggling to find the best continuation. Perhaps 22. Bxf6 Nxf6 23. Qxg6+ Qg7 24. Qxg7+ Kxg7 23. Re7+ followed by Rxb7 emerging a pawn up. There must be something better than this.

(e) 21....d4 22. Bxd4 Ne5 23. Nxe5 and white is a minor piece up.

In view of my lack of a good continuation in line (d) I am wondering whether my first move is correct.

I am out of time and must check.

Dec-22-10
Premium Chessgames Member
  kevin86: This one was pretty cut and dried. The knight just replaces the bishop in the attack and is just as lethal.

Zenon was far from inert with this attack-it was a gas!

Dec-22-10  Nut: I chose 21.Qc3, which I think is better ;-)
Dec-22-10  Patriot: <Nut> 21.Qc3 certainly is dangerous but what's your plan after 21...f6?

<kevin86> <Zenon was far from inert with this attack-it was a gas!> LOL! Your sense of humor is also "cut and dried"...much like my own!

Dec-22-10  MaczynskiPratten: <kevin86> <Zenon was far from inert with this attack-it was a gas!> Excellent - a noble pun, sir!
Dec-22-10  skemup: what do u think about 22. Rxg6 in line was played?
Dec-22-10  dcarlisle: Spent my whole time debating which square to move the rook and decided that e6 is better - I don't see how black can defend against this move. G4 isn't a bad alternative either.
Dec-22-10  wals: I opted for 21.Rg4, which may have continued----

Rybka 4 x 64 d : 17 : 10 min :

1. (3.74): 21...d4 22.Bxd4[] Qd6 23.Bb2[] Qe6[] 24.Re4[] Be5 25.Nxe5

BLUNDERS
BLACK: depth : 19 : 5 min :
(+3.94):20...exd5. Best, e5, =0.04.

1. = (0.04): 20...e5 21.dxc6 Bxc6 22.Re3 b5 23.Qc1 bxc4 24.bxc4 Qb4 25.Ba3 Qa4 26.Nd2 Qa6 27.Bc2 Nb6 28.Bb3 Bc7 29.Be7 Rd4 30.Bf6 Qb7

2. (1.86): 20...cxd5 21.Rxe6 d4 22.Rxd4[] Rc6 23.Re1 Bd6 24.Qd1[] Nf6 25.Ba3 Bxh2+ 26.Kxh2 Rxd4 27.Nxd4 Qxa3 28.Nxc6 Bxc6 29.Qd8+ Kg7 30.Qd4[] Qb4 31.Re3 Qa5 32.a4 Qh5+ 33.Kg1 Qg5 34.g3 Kg8 35.Qd8+

BLACK: depth : 20 : 6 min :
(+6.71):22...Ne5. Best, f6, +2.87.

and Black resigned, move 24... .

Dec-22-10  BOSTER: <Phony Benoni> <The puzzle move would be 21.Re6 ,21.Rg4 -I think black would reply 21...Qe7 when his king can flee westward >. No way! But thanks for the link. After 21.Rg4 Qe7 22. Rxg6+ if fxg6 23.Qxg6+ Kf8 24.Qxh6+ Ke8 25.Bg6+ ,if 24...Kf7 25.Ng5+. But after 22.Rg6+ if Kf8 23.Rg8+ Kxg8 24.Qh7+ Kf8 25.Qh8#. My opinion that 21.Rg4 almost equal 21.Re6.
Only computer can evaluate the difference.
Dec-22-10  TheBish: Z Franco-Ocampos vs A Alawieh, 1992

White to play (21.?) "Medium/Easy"

I got this right away, maybe I saw it years ago in Chess Life or something. My two candidate moves were Re6 and Rg4, but after awhile I noticed that 21. Rg4 allows the defense 21...Qd6. Therefore...

21. Re6! when there is little defense to the threat of 22. Rxg6+ and a mating attack.

Oct-23-12  Abdel Irada: Astounding to note the psychological effect of relative ratings in some cases. The same 2200 who confidently dominates everyone in his hometown sits across the board from a 2500, and suddenly he's a groping, hesitant, faltering neophyte who makes vacillating moves while his opponent slowly builds an annihilating advantage. I've seen this happen so many times, both over the board and online, that I wonder it isn't remarked on more often.
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