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Alexander Voltschok vs Roman Kreslavsky
Kiev (1970)
Spanish Game: Exchange. Gligoric Variation (C69)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Mar-24-10  Sashadrago: An attempted counter-attack with 16...Nh6 gives nothing: 17. Rxd7 Nxg4 18.Rxd8+ Rxd8 19.Bxd8 Kxd8 20.Nc3
Mar-24-10  benjinathan: This must be the easiest week ever. I have spent less than 30 seconds total on all 3 puzzles.
Mar-24-10  Aspirador: Did anybody try stockfish 1.6 on this position? My stockfish is going completely nuts, just look at these totally flawed evaluations:

http://img242.imageshack.us/img242/... http://img242.imageshack.us/img242/...

Mar-24-10  Aspirador: Hmm, something wrong with my stockfish version. Compiled it myself, other stockfish versions work better.
Mar-24-10
Premium Chessgames Member
  YouRang: Quite easy. Our queen pins the black queen, and by moving our bishop, we uncover our rook's attack on black's pinned queen.

So, the obvious question is: "Can we move the bishop in such a way that we have a good reply if black's queen takes our queen?"

Once you see the obvious question, it shouldn't take long to see the obvious answer: "Yes, attack the Rd8 with 16.Be7, because then 16...Qxg4 is answered with 17.Rxd8#".

Result: Black must lose the queen, and may as well resign.

Mar-24-10
Premium Chessgames Member
  agb2002: <johnlspouge:
...

Initially, I was not able to come up with a candidate, but I recalled the best advice I had from any teacher, from an art teacher, Xu, when I was about 35 years old: “When you are having trouble, go back to basics.”>

Two recurrent expressions I have heard from British engineers are "for practical purposes" and "back to first principles". Very useful.

I found 16.Be7 almost instantly because d7 is the intersection of two lines of interest: d1-d8 and c8-g4. Geometry not always helps but I think that this is a good example.

<The threat level to White is Q (i.e., he will lose his Q if he does not do something). There are 5 modes of defense: counter-attack and TRIP (take, run, interpose, protect). (Thanks for the TRIP mnemonic, <whiteshark>!)>

How about CRIPT, relaxing the spelling slightly?

Mar-24-10  VincentL: Be7 is apparently the move here.

16...... Qxg4 allows 17. Rxd8 mate

If 16..... Nf6 17. Rxd7 Nxg4 18. Rxd8+ Rxd8 19. Bxd8 Kxd8 leaving white a rook up.

The best defence is probably 16....Nxe7, and after 17. Rxd7 Rxd7 18. Nc3 white has Q for R + 2P.

White still has plenty of work to do from here, but a player of master strength should be able to win.

Mar-24-10  scormus: Remarkably easy for a Wednesday, I'm tempted to ask if CG really meant us to do more than find the win. The lead up is more interesting than the actual position.

After 13 ....0-0-0? it would have been more testing to find 14 e5. Then B can fight on after 14... cxd6 though I think W would win (eventually) after 15 Qg4+ B moves 16 e6

I might be wrong but think B would have been OK if W instead played 14 14 Qg4+ immediately, then 14 ... f5. eg. 15 exf5 Nf6 16 Qf4 Nd5

Mar-24-10  Cushion: Be7 appears to win material
Mar-24-10
Premium Chessgames Member
  chrisowen: <A Karpov fan> I see pile up via a d8 battery. Voltschock amps it with 16.Be7. Black is at sixes and sevens, not good to put into Kreslavsky's CV. White pigeon holes the queen and conducts what is a powerful wave, currently the lady's static. Potential difference being a piece up allows chance 16..Nf6 doesn't work. After Qg4 the mate is side on, black takes queen shocks horror!
Mar-24-10  Marmot PFL: This is briefly mentioned in Fischer's book - <Black dares not accept the pawn: 8...BxN; 9 QxB, QxP 10 R-Q1, Q-B5; 11 B-B4, etc.> Gligorich said best is 8...c5 9 d5 Bd6, but forgot his analysis and played 8...Qd7.
Mar-24-10
Premium Chessgames Member
  johnlspouge: < <Patriot> wrote: [snip] #3 in your analysis is impossible, however, due to the pin. >

Yes, I will correct my personal copy of today's solution, so many thanks, <Patriot>.

My cognitive processes were obviously intent on ignoring the pin, despite noting it in the preliminary analysis. This explains my trouble finding the candidate: unlike many, I left myself unable to recognize yesterday's puzzle pattern.

< You point out an important idea...think simple first, which seems to be making my games a lot easier! >

To elaborate, even if I miss a puzzle, my preliminary analysis usually does indicate the correct candidate. Solution of a difficult problem requires a thorough analysis of its elements, but without sufficient practice in the specific problem domain, the problem elements must be held consciously (which I repeatedly failed to do today). With practice, the whole process of remembering and applying the problem elements should become automatic, however.

I can only hope ;>)

Mar-24-10  patzer3844: 3 seconds puzzle,a generous week from CG
Mar-24-10  wals: Rybka 3 1-cpu:3071 mb hash: depth 19:

Black's errors:-
14...fxe5+2.28, better was cxd6 or f5 +0.57

15...Qd7 +4.06, better was Kb8 +2.28

16...Qxg4 #1 better was Nxe7 or h5 +4.57

Mar-24-10
Premium Chessgames Member
  patzer2: <wals> What improvements does Rybka show prior to the 14...fxe5? miscue. Seems to me 14...cxd6 and 14...f5 still drop a pawn, and allow a permanent White advantage.

So Black needs something earlier. I like 7...Bd6 = to expedite Black's task of equalizing.

Mar-24-10  InspiredByMorphy: 16. ...Nxe7 17.Rxd7 Rxd7 18.Nc3 Rhd8 19.Rd1 Nd5 was better although still losing.
Mar-24-10  David2009: Wednesday's puzzle A Voltschok vs R Kreslavsky, 1970 White 16?

White (to move) is already a piece ahead. The game presumably continued 16 Be7 so that if Qxg4 17 Rxd8 mate. Black will not fall for this. However alternatives are unattractive: (A) 16...Nxe7 17 Rxd7 Rxd7 18 Nc3 and now if ...Nd5 19 Rd1 and Black is still in a bind and R for Q down; (B) 16...Nf6 17 Rxd7 Nxg4 18 Rxd8+ Rxd8 19 Bxd8 Kxd8 and White is a whole Rook ahead. In blitz or rapid-play I would go for (A) but in tournament play 16...Resigns is perfectly respectable. Unfortunately for Black the thematic 16...Qxd1+ 17 Qxd1 Rxd1 checkmate is illegal because the Queen is pinned: perhaps Black had not noticed this detail when playing a "combination" leading to the diagram position. Time to check:
=====
On reflection - in a tournament game 16...Qxg4 is as least as good as 16...Resigns. Defending as Black, you want the fastest finish.

Mar-24-10  muralman: Just because it is, I ain't going to call this one easy. I already know what the puzzle masters will meet out in punishment.

So, shhhh

Mar-24-10  wals: <patzer2>

12. Qg3 h5 13. h3 h4 14. Qe3 Bd6
15. Bxd6 O-O-O 16. Na3 cxd6 17. Qa7 Kc7 18. Rd3 Ne7 19. Rb3 Rb8 20. Rc1 Qe6 21. Qb6+ Kd7 22. Nc4 Nc8 23. Qe3 b5 +0.20

with black up a pawn.

Mar-24-10
Premium Chessgames Member
  patzer2: <wals> 16. Nc3 looks better than 16. Na3 in that line. What does Rybka show there?
Mar-24-10  PopcornMonkey: 16 ... Nxe7, Rxd7 Rxd7

...i mean it's still a resignable position, but if you were inclined to resigned, you may as well have done so before moving 16 ... Qxg4

Mar-24-10  TheBish: A Voltschok vs R Kreslavsky, 1970

White to play (16.?) "Medium/Easy"

White is up a piece, but it appears that Black must win it back after 16. Qxd7+ Rxd7 since the Bd6 is pinned against the Rd1. However, looks can be deceiving, and the pin on the h3-c8 diagonal (White's queen pinning Black's queen to her king) is most useful!

16. Be7! Nxe7

Forced, since 16...Qxg4? 17. Rxd8 is mate.

17. Rxd7 Rxd7

and White wins, now being up a queen for a rook.

Mar-25-10  SRILANKANMASTER: Ah, but then, my comments are not menat to be solely of a humerous disposition...you se, my dear people, I, being a mster of considerable skill, even though I say o myself, and with all modesty, I hve happened to notce a deplorable lack of ability in this site. I am, as such, willing to be your mentor and guide the lot of ou, from the state of ignorance you are at at present, to almost as much skill as I myself possess! :)
Mar-25-10  TheaN: Wednesday 25 March

<16.?>

Target: 2:10;000
Taken: <30s? I think, very easy actually

Material: White up, ♗ / 2♙

Candidates: Bxc7, <[Be7]>

-ML-
Only when I start writing this I see that Black actually tried a zwischenzug here, by probably postponing the capture of the Bishop on d6. That will prove to be a fatal mistake (or maybe it was all forced). In fact Black is threatening to win back the Bishop with a two-pawn interest, but White couldn't care less and take advantage of the crosspin of the Queen on d7.

<16.Be7!> wins. 16....Qxg4, what is in fact the threat that would have allowed Black to win the Bishop on d6 (after 16.Qxd7† Rxd7 the pin allows Black to get a superior position with 17....cxd6), loses on account of 17.Rxd8‡ 1-0. Black is forced to capture the Bishop:

<16....Nxe7 17.Rxd7 Rxd7 18.Nc3 > but the inactivity of the Rook on h8 in combination with the Q/R deficit should finish off Black quickly enough. Time to check.

Mar-25-10
Premium Chessgames Member
  kevin86: Double pin!! White pins the queen to king...and to the lethal mating square of d8. The Queen is lured away and mate comes immediately.
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