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Valery A Chekhov vs Yuri P Zotkin
Moscow-ch (1979)
English Opening: Agincourt Defense. Catalan Defense (A13)  ·  0-1
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
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May-11-11  LIFE Master AJ: First glance did NOT provide the solution today ... had to methodically work through my system and my checklist ...

Mapping the chessboard always helps! (Did not really seriously consider QxRcheck until I got to step #4)

"Always check - it might be mate"
- <<<<< GM Savielly Tartakower .>>>>>

May-11-11
Premium Chessgames Member
  Once: <sevenseaman> Your diagram shows 36. Qc7, which would indeed be disastrous for white.

Instead 36. Qe7 sets black more of a challenge:


click for larger view

May-11-11  Patriot: <Once> I also looked at the Re1+/Rxf1+ idea but not Rc1 because at that point it was time to switch back to Rd1+/Bxf1 which is more forcing. It became clear that Rd1+ dominates Re1+. I become suspicious of "slow" (Rc1) moves during combinations, although it is a strong threat.

By the way...what is "GOOT" again? Thanks!

May-11-11  cyclon: Okay, let's see... hmmh... - I'd "say" 32. -Qxa1+ to begin with, when 33.Nxa1 is forced. Then 33. -Rd1+ -precisely this Rook- (33,-Re1+? 34.Bf1 Bxf1 [-Rxf1+ 35.Kg2 Rxa1 36.Qxc4 White survives] 35.Qc3 Rde8 [-Rdd1?? 36.Qc8X] 36.h4 White's got some extra-oxygen) after which 34.Bf1 Bxf1 ( -Rxf1+?) 35.h4 (Qc2 Rxa1/Qc6?? Bb5+) -Rxa1 and Blacks clear edge though White may still resist for the time being, but the outcome is in Blacks favor.
May-11-11
Premium Chessgames Member
  Once: GOOT = Get Out Of That. A non forcing move which allows the opponent to play almost anything, but which contains a threat that he cannot escape from.

For example, 34...Bxf1 sets up this position:


click for larger view

Unlike 34...Rxf1+ it does not force white's reply. But it gives white two problems and he can't escape both (defend against the mate and protect the Na1).

GOOTs are dangerous for both players. Because you are allowing your opponent so many choices you have to be careful that none of them work.

May-11-11  sevenseaman: <Once> That was an oversight. Analysis with 36. Qe7 will follow. It does look a good move and seems to create some problems.
May-11-11
Premium Chessgames Member
  Jimfromprovidence: <CHESSTTCAMPS> < I intended to make the same point that you did about the importance of playing 33... Rd1+ instead of 33... Re1+. However, after your 2nd diagram, black still wins with 35... Rc1! (threatening both Bh3# and Bd3+) 36.Qa3 Rb1! and white must get mated or give up the knight to 37... Bd3+.>

I never even thought of 35...Rc1 as an alternative. As many others have pointed out, though, it's thwarted by 36 Qe3!, attacking the rook.


click for larger view

This saves white as black obviously cannot play 36...Bh3+ as that move loses the rook.

And, if black captures the knight here, then white simply takes the bishop in return.

Black's best choice appears to move the rook to b1 or d1. That gives white the needed tempo to play ...h4, eliminating the mate threat.

(The position below is after 36...Rd1 37 h4). it looks pretty even.


click for larger view

May-11-11  Patriot: <Once> LOL...Nice acronym! Great commentary!
May-11-11
Premium Chessgames Member
  kevin86: Queen sac on Wednesday? I guess so...
May-11-11
Premium Chessgames Member
  doubledrooks: After examining and discarding 32...Qe1+ and 32...Bxb3, I found the following:

32...Qxa1+ 33. Nxa1 Rd1+ 34. Bf1 Bxf1 35. h4 Rxa1

May-11-11  molinov: <TuxedoKnight> That same game is featured in Claude Chabrol´s L´oeil du malin. http://www.imdb.com/title/tt0056302/ I recommend the movie, and not just for its chess-related scenes.
May-11-11  sevenseaman: <Once> Here is the analysis after 36. Qe6 as promised.

36.Qe7 Bf1+

A)37. Kg1 Bh3 leads to mate or loss of Q if inserted at e1.

B)37. Kf3 Rd3+ 38. Kg4 Rc4+ 39. Kh5 Rd5+ is mate or loss of Q if inserted.


click for larger view

It looks the Q move to e7 can be handled.

May-11-11  ZUGZWANG67: Now we have a «real life puzzle» situation. W has a pawn for the exchange. The 2 BRs are excellently placed and so is the BB. The Qs are facing and are threatening each other to capture (although both are defended). The position of the bishops and the white king's suggest that a Morphy mate is possible, that is, a BB at h3 and a BR on the 1st rank. Of course, that 1st rank is defended.

I considered 32...Bxb3, 32...Qxc5, 32...Qe1+, 32...Rd1+ but finally decided to choose 32...Qxa1+ because I don't see any interesting continuation for Black. After 33.Nxa1 (forced), 33...Rd1+ (crucial! as we'll see below) 34.Bf1 Bxf1! wins the N at a1 because W has to defend against 35...Bh3 mate. So 35.h4 (or 35.Qh5) 35...Rxa1 and Black has 2 rooks and a B for a Q + p and should win.

The cruccial point of 33...Rd1+ is that after 33...Re1+(?) 34.Bf1 Bxf1, 35.Qc3 defends against both Black's threat of 35...Rxa1 and 35...Bh3+.

Let's see.

---------------

Was 35.f4 correct? I had either 35.Qh5 or 35.h4. I'll see what others have to say...

May-11-11  hedgeh0g: The queen sac was fairly obvious given the weakness of White's back rank and the potency of Black's LSB. I got clumsy, however, and played the e-rook, figuring it made no difference which rook delivered the "decisive" blow. However, Re1+? Bf1 Bxf1 is answered by Nc2!, keeping the position unclear. The hanging bishop on c4 doesn't give White time to take with the rook and White always has Ne3 to cover f1.
May-11-11
Premium Chessgames Member
  Once: <sevenseaman> In your line B, instead of 39. Kh5, let's look at 39. f4


click for larger view

White's king is building an unusual, but unusually effective fortress. Looks pretty level to me (and to the silicon monster).

May-11-11  sevenseaman: < CHESSTTCAMPS: <sevenseaman: <... Please have a hard look at <gofer>'s comment. Its different and path-breaking.>

Certainly the king hunt line is inventive and challenging to the board vision, but I like to save the hard work for Sundays :). Referencing the diagram from <Gofer's> first post, the tougher test has to be 36.Qe7, so that the queen does not take a flight square from the king at g5.>

Your point about 36. Qe7 has been answered in my last comment to <Once> above.

May-11-11  rilkefan: "GOOT"? "Get out of town"?
May-11-11  CHESSTTCAMPS: <<sevenseaman:> Your point about 36. Qe7 has been answered in my last comment to <Once> above.>

Sorry, but it hasn't. You have to realize that Fritz would not give such a close evaluation if black had such a quick mate available against best defense - see last post from <Once>.

<JimFromProvidence> Yes, I caught my error before you posted, but you have illustrated the flaw well - thanks.

May-11-11
Premium Chessgames Member
  Fusilli: <sevenseaman> <Thanks for your kind analysis but


click for larger view

43...Bd3+ 44. Ke6 Re2+ 45. Kd6 Rd4+ the king must avoid c5 and go to c7. 46. Kc7 Re7+ 47. Kb8 or b6 there is no survival for White.>

White should play 45.Kd5, not 45.Kd6:


click for larger view

I think White is surviving. Anyhow, fun to analyze this line, but I think the whole thing was settled by <Once> and confirmed by Fritz...

May-11-11  MaczynskiPratten: For some reason, having looked at Qe1+ and having correctly abandoned this in favour of Qxa1+, I then got my mind fixed on Re1+ instead of the superior Rd1+. Even if White did not have 35 Nc2!, which has been pointed out by various kibitzers, there is a vital difference between the position after 34...Bxf1 with Rooks on d1/e8 (actual solution) or e1/d8 (after 33..Re1+). In the latter case White's Queen can attack the Black Rook on e1 with 35 Qc3! and save his Knight on a1. In the actual game White is helpless against the GOOT because if he moves his Q to attack the d1 Rook, e.g. to c2 or h5, it is on a white square and will be clobbered by a discovered check, Bd3+ or Be2+. Just another small nuance.
May-11-11  sevenseaman: <once> Yes, f4 was a simple move I missed, funnily.

It has been screaming fun analysing this line and clearing the cobwebs. It would not have been possible without your support and whistle on the other side.

I shun machines and need vital analytical help at times. Thank you for responding to my SOS.

<Fusilli> Yes, White survives. I say you are a great sport, man. I am delighted to meet someone who was kind and good enough to walk some of the distance with me. See ya, sooner again.

May-11-11  meetjain2295: Can anyone tell me the problem with 32...Bxb3! ?
May-11-11
Premium Chessgames Member
  Gypsy: <meetjain2295: Can anyone tell me the problem with 32...Bxb3! ?>

33.Qxe5 Rxe5 34.axb3 Rb5(!) (now, the b-pawn can not be saved) 35.Rb1 Rdb8 36.h4 Rxb3 37.Rxb3 Rxb3


click for larger view

Black has an exchange, but White fortress looks sturdy. For instance,

38.Bd5 Rd3 39.Be4 Rd4 40.Bf3 Kf8 41.Kg2...

Where and how is Black going to break through?

May-12-11
Premium Chessgames Member
  Gypsy: Here is more on that endgame. (Note the position after 39th move.)

E Paoli vs Kholmov, 1964

May-12-11
Premium Chessgames Member
  Gypsy: And a couple more games illustrating the defense of the endgame well:

R Vera vs Baburin, 2000

A Korotylev vs V Malisauskas, 1996

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