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Julius Kozma vs Ladislav Alster
CSR-ch (1953), Prague CSR, rd 8, Nov-25
Sicilian Defense: Dragon Variation. Yugoslav Attack Modern Line (B76)  ·  1-0
ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Aug-01-13  cyclon: My solution today is; 23. Qh6 ( threats mate with 24. Qh8+ Bxh8 25. Rxh8+ Kg7 26. R1h7X because -Nf6 is pinned. ) and now several alternatives that comes into question leads Black's loss;

1.) 23. -Kf8 24. Qxg7+ ( also 24. Qh8+ does the job by transposing ) -24. -Kxg7 25. Rh7+ Kf8 26. Rh8+ Ng8 [ 26. -Kg7 27. R1h7X ) 27. Rxg8+ and mates next.

2.) 23. -Bxh6 24. Rxh6 Nh7 ( what else? ) 25. Rxh7 f6 ( or if 25. -F5 26. Rh8+ Kf7 27. R1h7X ) 26. Rh8+ Kg7/Kf7 27. R1h7X

3.) 23. -Nh5 ( 23. -Ne8 24. Qh8+ mates, or 23. - Nh7 24. Qxg7X ) 24. Rxh5 and mate is coming from 'everywhere' ;

3.1.) 24. -Bxe5 ( 24. -gxh5 25. Qxg7X ) 25. Rxe5 mating. 3.2.) 24. -f6 25. Qxg7+ mates.

3.3.) 24. -Bxh6 25. Rxh6 mates.

3.4.) 24. -Kf8 25. Qh8+ mates
There's no usable intermediate moves for Black in this puzzle that would harden the White's task and he is also lacking couple of tempi ( actually White WON them BY 23. Qh6 ).

In any case this puzzle teaches a lot, though in 'brilliancy' I prefer Spassky's Qh6 yesterday. Still, cufflinks for Kozma!

Aug-01-13  cyclon: Interesting that I didn't notice the Black's game-line defence 24. -g5 after which the mate is not still specifically difficult to find though - ( 27. Bd3+ ) -27. -Qe4 ( 27. -Ne4 28. Rg7X, or 27. -Bf5 28. Bxf5X/28. gxf5X ) 28. Bxe4+ and mates next as mentioned previously. This variation is important finesse - Be2 'awakens'.
Aug-01-13  Nick46: <diagonalley: blimey... this one was hard... and it's only thursday...> here here
Aug-01-13  LIFE Master AJ: This one - for me - was almost insane. (I spent well over 15 minutes here, and still did not find all of the pertinent variations.)

I finally went with 23.Qh6!! (If that is really the key move.)

Time to look.

Aug-01-13  LIFE Master AJ: I might have taken as much as half an hour ... I shut the stopwatch down after about 17 minutes.

I have cheap stopwatch in my desk, I also have the same function on my wristwatch.

Aug-01-13  JoergWalter: <LIE Master AJ: I might have taken as much as half an hour ... I shut the stopwatch down after about 17 minutes.

I have cheap stopwatch in my desk, I also have the same function on my wristwatch.>

Thank you, <LIE Master>, useful information.

Aug-01-13  TomOhio: I guess the moral here for Black, based on moves 18-22, is that if your opponent is totally ignoring you... there's a reason.
Aug-01-13  James D Flynn: White is a piece down but he has a mating attack based on the open h file and the latent threat of his Black square B on the long diagonal. 23.Qh6(not Qh4 Nh5) Bxh6(if Nh5 24.Qxg7+ Nxg7 25.Rh8# or if Kf8 24.Qh8+ Bxh8 25.Rxh8+ Kg7 26 R1h7#)24.Rxh6 Nh7(if Nh5 Rh8#) 25.Rxh7 f6 26.Rh8+ Kf7 27.R1h7#
Aug-01-13  morfishine: White is down a piece

<23.Qh6!!> Kf8 (or 23...Bxh6+ 24.Rxh6 Kf8 25.Rh8+ Ng8 26.Rxg8+Kxg8 27.Rh8#) 24.Qh8+ Bxh8 25.Rxh8+ Ng8 26.Rxg8+ Kxg8 27.Rh8#

*****
PM: Interesting that 23.Qxh6 Kf8 <24.Qxg7+> doesn't quite work due to 24...Ke8 25.Qf8+ Kd7!

A credit to Black for holding off mate til move 28

*****
<al wazir> Good point on 23.Qh4. I went down that road myself :)

*****

Aug-01-13  azax: As usual, this Thursday kicked it up a notch.

Fianchettoed bishops are notoriously hard to attack - even if you get your Queen to h7, your opponent just has to play ...Kf8 and you can't make any progress. So it was disappointing but no great surprise that Rh8+ imploded on itself, but at the same time the h-file is key. Once I realized that 23. Qh6! jumped out at me.

"The key to strategy... is not to choose a path to mate, but to choose so that all paths lead to mate."

Aug-01-13
Premium Chessgames Member
  Zhbugnoimt: <TomOhio> 23.Qh6 Kf8 24.Qh8+ Bxh8 25.Rxh8+ Kg7 26.R1h7# and if 25...Ng8 then 26.Rxg8+ Kxg8 27.Rh8# if 24...Ng8 then 25.Qxg8+ Kxg8 26.Rh8+ Bxh8 27.Rxh8#
Aug-01-13
Premium Chessgames Member
  chrisowen: I hoofed over straight port of call weighty issued,

hoot and boot g5 down graded c7 offer futile,

resistance jeep creep why not h7 to kick back queen a quad grip h2 engage sussed e5 giving h1 each caddy be h8 in sight rookd1 inceed 16...d5 even pe5,

energy for a oomph gable horse f6 beck and call,

wait no affable curious again queen pocket 16.Qg5,

Qc7 ja smoothie spine pawn a germane 17.e5 moment,

of truth baby go near bend bin feed exchange off re,

you duty bishop be one step closer vantage my liege,

f6 is stuck in good game queen cycle forward and very complex us key to believe hard it is 22...bxc3,

when fill in got 23.Qh6! mate in seven

Aug-01-13  SuperPatzer77: <al wazir> Yeah, 23. Qh6 is much stronger than 23. Qh4. -- <al wazir>'s line is 23. Qh4 Nh5 - It is too slow. The best option is 23. Qh6!!

23. Qh6!! Nh5, 24. Qxg7+! Nxg7, 25. Rh8# 1-0

SuperPatzer77

Aug-01-13
Premium Chessgames Member
  kevin86: After the queen sac,there is NO escape from the rooks.
Aug-01-13  BOSTER: After the countless games represented <CG> where "h7" pawn was under attacked, finally this pawn abandoned the board, creating the breach in the defensive wall of the black pos.

Maybe she was replaced, or got a promotion, or took a long vacation. Looking at the black pos. we can see not only that a screen is broken, and everybody can come "through" into without invitation, but it is useful to notice that the initially mobile pawns near black king became rigid because bishop e6 and knight f6 blocked them, and this means that own pawns are pressing the king to the back rank.

Because first idea to play 23.Bxf6 exf6 24.Rh8+ Bxh8 25.Qh6 Bg7 doesn't work-black has an escape e7 square, I made a conclusion that is better don't touch black pawn structure.

So,here "crazy" 23.Qh6-sometimes the threat is much stronger than execution. If 23...Bxh6+ 24.Rxh6 Kf8 25.Rh8+ Ng8 26.Rxg8+ Kxg8 27.Rh8#. If 23...Bxh6+ 24. Rxh6 g5 25.Rh8+ Kg7 26.R1h7+ Kg6 27.Bd3+ Qe4 28. Bxe4+ Nxe4 29.Rg7#.

Aug-01-13  scormus: 23 Bxf6 Bxf6 24 Qxf6 and wins. dont even need the Be2 .... Oh no, B can take with the pawn instead.

Hang on 23 Qh6!, B might as well take then 24 Rxh6 the WRs do the business in the corner ... unless the g6 square is available for the BK. Ah yes, I had a feeling the Be2 had to come in somewhere. Cool finish!

Aug-01-13  BOSTER: <azax> <"The key to strategy... to choose all paths lead to mate">.

At least in today <POTD> you can choose two ways to find the solution. First, choose random moves and see which of them lead to mate. But I prefer second. To understand what is the <core> of the pos., and here the key to solution is the rigid pawn structure near the black king and open "h" file.

Aug-01-13  azax: <BOSTER> I'm not sure you understood me. I was referring to the fact that black has several ways to try to wiggle out after 23. Qh6, but all of them end with mate anyway.
Aug-01-13  TomOhio: It always comes back to that damn e5 Bishop. I even tried 23.... Nh5. No luck. Black is toast.
Aug-01-13  Moszkowski012273: White could of made it an easier win (with less room for error) with 19.Bxf6
Aug-01-13  rhedrich: I don't know, I though this one was pretty easy. Open h-file, a bishop on e5, and a non-checkable king? Screams for a sac. Good OTB move, though.
Aug-02-13  LIFE Master AJ: My main question would be:
Is it all sound? What does the box show?
Aug-02-13  RandomVisitor: Interesting is the position after 22.Rdh1:


click for larger view

Black has interesting choices - 22...bxc3 fails due to the spectacular 23.Qh6, but what else could he have done?

My favorite is 22...Bxg4 23.fxg4 bxc3 draw!

Rybka 4.1 x64: <21-ply>

0.00 22...Rd8 23.Qh6 Bxh6+ 24.Rxh6 g5 25.Rh8+ Kg7 26.R1h7+ Kg6 27.Rh6+ Kg7 28.R6h7+ Kg6 29.Rh6+ Kg7 30.R6h7+ Kg6 31.Rh6+ Kg7 32.R6h7+ Kg6 33.Rh6+ Kg7 34.R6h7+ Kg6 35.Rh6+ Kg7 36.R6h7+ Kg6 37.Rh6+ Kg7

0.00 22...Qc5 23.axb4 Qxb4 24.Qh6 Qa3+ 25.Kb1 Bxh6 26.Rxh6 Qb4+ 27.Kc1 Qa3+ 28.Kb1 Qb4+ 29.Kc1 Qa3+ 30.Kb1 Qb4+ 31.Kc1 Qa3+ 32.Kb1 Qb4+ 33.Kc1 Qa3+ 34.Kb1 Qb4+ 35.Kc1 Qa3+ 36.Kb1 Qb4+ 37.Kc1 Qa3+

0.00 22...Qb6 23.axb4 Qa6 24.Ne4 Bc4 25.Qh4 Qa3+ 26.Bb2 Qxb2+ 27.Kxb2 Nxe4+ 28.Kc1 Ra8 29.fxe4 Bc3 30.Qh7+ Kf8 31.Qh6+ Kg8 32.Qh7+ Kf8 33.Qh6+ Kg8 34.Qh7+ Kf8 35.Qh6+ Kg8 36.Qh7+ Kf8 37.Qh6+ Kg8

0.00 22...Bxg4 23.fxg4 bxc3 24.Qh4 Nh5 25.Bxb8 Qd5 26.Bd3 b4 27.gxh5 bxa3 28.Qg4 f5 29.Qa4 a2 30.Ba7 Bh6+ 31.Kd1 a1Q+ 32.Qxa1 Qf3+ 33.Be2 Rd8+ 34.Ke1 Bd2+ 35.Kd1 Bf4+ 36.Ke1 Bd2+ 37.Kd1 Bf4+

0.00 22...Bb3 23.axb4 Qe6 24.Bd3 Ra8 25.Bd4 Ra1+ 26.Nb1 Qd6 27.Bxa1 Qxd3 28.Bc3 Rxc3 29.Nxc3 Qxc3 30.Qc5 Qxc5 31.bxc5 Bd5 32.Rd1 e6 33.c3 Bf8 34.g5 Ne8 35.Rdh1 Bg7 36.Kc2 Bxf3 37.Rf1 Be4+

+0.48 22...Qa6 23.Qh6 Bxh6+ 24.Rxh6 Qxa3+ 25.Kb1 Ba2+ 26.Nxa2 Nh7 27.Rxh7 f6 28.Bb2 Qe3 29.Nc1 b3 30.Nxb3 Qxe2 31.Nd4 Qd1+ 32.Rxd1 Kxh7 33.f4 Kg7 34.Ka2 Kf7 35.Kb3 Rh8 36.g5 Rh3+ 37.Kb4 Rh4

+0.49 22...Qxc3 23.Bxc3 bxc3 24.Bd3 Ra8 25.Kd1 Rxa3 26.Ke2 Rd8 27.Qxb5 Nd5 28.Be4 Ra2 29.Qb7 Bc8 30.Qb1 Rb2 31.Qc1 Bb7 32.Rd1 Be5 33.Bxd5 Bxd5 34.Rh3 e6 35.Kf1 Bg7

+1.50 22...Bd7 23.Bd3 Qe6 24.Ne4 Rb6 25.axb4 Ra6 26.Nc5 Rxc5 27.bxc5 Nh7 28.f4 Bxe5 29.Qxe5 Qxe5 30.fxe5 Ng5 31.Rh8+ Kg7 32.Kb2 Re6 33.Rb8 Rxe5 34.Bxb5 Bxg4 35.c6 Ne6 36.Rh4 Bf3 37.Rc4

+1.76 22...Bd5 23.Bd3 Bxf3 24.Bxg6 fxg6 25.Qxg6 Nh5 26.Qxh5 Bh6+ 27.Qxh6 Qxh6+ 28.Rxh6 Bxh1 29.axb4 Bg2 30.g5 Rxc3 31.Bxc3 Kf7 32.g6+ Ke6 33.g7+ Kf7 34.Rh7 Rg8 35.Rh2 Bd5 36.Rf2+ Kg6 37.Kd2 Bf7

+1.94 22...Bc4 23.Qh4 Nh5 24.Bxg7 bxc3 25.gxh5 Qc5 26.Bxc3 Qe3+ 27.Kb2 Bxe2 28.Qe1 Qxc3+ 29.Qxc3 Rxc3 30.Kxc3 Bxf3 31.Rg1 Kg7 32.hxg6 fxg6 33.Rh3 Bc6 34.Re3 Rb7 35.Rge1 Kf7 36.Kb4 Be8 37.Rf3+ Kg7

Aug-02-13  RandomVisitor: After 22...bxc3 23.Qh6 black is toast:


click for larger view

Rybka 4.1 x64: <23-ply>

+M6 23. ... Bxh6+ 24.Rxh6 g5 25.Rh8+ Kg7 26.R1h7+ Kg6 27.Bd3+ Qe4 28.Bxe4+ Nxe4 29.Rg7+

+M4 23. ... Kf8 24.Qh8+ Bxh8 25.Rxh8+ Ng8 26.Rxg8+ Kxg8 27.Rh8+

+M4 23. ... g5 24.Qxg5 Kf8 25.Rh8+ Ng8 26.Rxg8+ Kxg8 27.Qxg7+

+M3 23. ... Qxf3 24.Qh8+ Bxh8 25.Rxh8+ Kg7 26.R1h7+

+M3 23. ... Bc4 24.Qh8+ Bxh8 25.Rxh8+ Kg7 26.R1h7+

+M3 23. ... Bxg4 24.Qh8+ Bxh8 25.Rxh8+ Kg7 26.R1h7+

+M3 23. ... Qc4 24.Qh8+ Bxh8 25.Rxh8+ Kg7 26.R1h7+

+M3 23. ... Qc7 24.Qh8+ Bxh8 25.Rxh8+ Kg7 26.R1h7+

+M3 23. ... Qd6 24.Qh8+ Bxh8 25.Rxh8+ Kg7 26.R1h7+

+M3 23. ... Qe8 24.Qh8+ Bxh8 25.Rxh8+ Kg7 26.R1h7+

Aug-02-13  RandomVisitor: After 10...Be6:


click for larger view

Rybka 4.1 x64:

<[+0.51] d=25 11.Kb1 Rc8 12.g4> Nd7 13.Bxg7 Kxg7 14.Nd5 Rc5 15.h4 f6 16.g5 Bxd5 17.exd5 Nb6 18.h5 Rxd5 19.gxf6+ Rxf6 20.Bd3 g5 21.Rhg1 Kh6 22.Rde1 Qf8 23.b3 Rxf3 24.Re6+ Rf6 25.Rge1 Rxe6 26.Rxe6+

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