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Judit Polgar vs Gregory Kaidanov
Polgar - Kaidanov Sicilian Theme Match (2010), Hilton Head USA, rd 2, Feb-23
Sicilian Defense: Dragon Variation. Yugoslav Attack Old Line (B78)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 4 OF 5 ·  Later Kibitzing>
Apr-05-11  LIFE Master AJ: <Patriot> Good post, you summed up a lot of my thoughts.
Apr-05-11  sevenseaman: <Bryan14> No. Qh4+ Kxe3
Apr-05-11  sevenseaman: <Gilmoy> I've had second thoughts. Let me stay in suspense a while longer (hardly so, though). No one else seems to have cottoned on.. and they are still trying.
Apr-05-11  CHESSTTCAMPS: Aside from noting that I can't spell "sufficient", I'm surprised that such a small minority picked the alternative solution 36.Qh3.
Apr-05-11  Chesschatology: "sevenseaman: <Chesschatology> Rxg5? Ne2+ (discovered). You could find some more. But how the puzzle makes one mad is understandable. So try. "

But if Ne2+ just Nf1++

Apr-05-11  sevenseaman: <David2009: <sevenseasman>: Nice mate in two!> Sure glad to have made your acquaintance (sort of).

I do not use chess engines. I try and keep it simple. And friends like you can always help, like it was today. I was really bugged by Qh3's winning potential.

Comment allez vous? Que voulez vous, mon ami? Vous ette Francaise? Non, je pense.

Apr-05-11  sevenseaman: Apologies < Chesschatology> the refutation is h5. I was in a traffic jam when I posted last to you.
Apr-05-11  eblunt: <CHESSTTCAMPS:> I think it's to do with the fact that it's a "retreating" move. It seems to me that attacking moves where the piece moves backwards are the hardest to see.

Also surpised it's such a small minority, and even more surprised that it's disputed as being a solution at all. As your excellent analysis shows, at any decent level of chess black would resign against ♕h3 within a couple of moves.

Apr-05-11  Chesschatology: <sevenseaman:> Beautiful! What a sly refutation, and what a great puzzle! Thanks!
Apr-05-11  cyclon: In my category I wouldn't call this puzzle exactly "easy", but anyway, here's the suggestion; 36.Qd6 Qc3 (What else? F.e. 36.-f6, -Qxd6, or -Qxg5 37.Rh8+ mates) 37.Qf6 and instead of cufflinks my proposal here is "eyelash browse", because after 37.-Qc2+ 38.Ka1 it's over.
Apr-05-11
Premium Chessgames Member
  patzer2: For today's Tuesday solution, 36. Qd6! Qc3 37. Qf6 combines the decoy, deflection and obstruction tactics for an easy win.

P.S.: I missed this strongest solution, but my alternative 36. Qxb5 still wins after 36. Qxb5 Qc3 37. Qa5! Qd4 38. R1h4 Rxc4 39. Rxd4 Rxd4 40. Rh8+ Kxh8 41. Qe5+ Kg8 42. Qxd4 .

Another sufficient winning alternative is 36. Qh3 , when play might continue 36...Kf8 37. Rh8+ Ke7 38. Rxc8 Rxc8 39. Qxc8 .

Apr-05-11  SuperPatzer77: It is 36. Qh3 winning, also but with a bit more work. Judy's move 36. Qd6! leads to a quick mate. It can force the deflection of the Black Queen off the a1-h8 diagonal.

Well, take care, chess folks.

SuperPatzer77

Apr-05-11  Marmot PFL: Unfortunately I missed 36 Qd6, but 36 Qh3 looks strong enough. If 36...Kf8 37 Rh8+ wins a rook, or queen for rook, and 36...f5 37 Qe6+ leads to mate.
Apr-05-11
Premium Chessgames Member
  agb2002: <Patriot:
...
<agb2002> In your first line B), 36.Qd6 Qg7 37.Qf6? Qxh7 is the way to go. The simple 37.Rxg7+ forces mate.>

Can't believe I forgot that rook...

Apr-05-11
Premium Chessgames Member
  kevin86: As usual,I figured a good first move,but missed the counter to the counter.

36 ♕d6 ♕c3 37 ♕f6 and mates with the rooks.

I had ♕d5 but after ♕c3,♖c1 looks good,but now the mate threat is gone.

Apr-05-11  ChessPieceFace: Okay, I haven't looked yet, but here's my (novice) analysis:

36.Rh8+

If 36...Qxh8, 37.Rxh8+ Kxh8 and white takes the Queen for two Rooks (probably not favorable, I don't think).

So then:

If 36...Kg7, 37.Rh7+ Kf6 and then I don't know what.

Neither of those really seems to be very great outcomes... :/

Apr-05-11  ChessPieceFace: Uh...well, I blew that one. :(
Apr-05-11  ChessPieceFace: Oh, duh...in my second group of analyses, I listed 37...Kf6 which is, of course, not a legal move. I need to practice/study/think more.
Apr-05-11
Premium Chessgames Member
  doubledrooks: The black queen is the only piece stopping Rh8+ and R1h7#, so a deflection move seems like a possibility. Therefore, 36. Qd6 and now:

a. 36...Qxd6 37. Rh8+ Kg7 38. R1h7#

b. 36...Qc3 37. Qf6

b.1 37...Qxf6 38. gxf6 and 39. Rh8#

b.2 37...Qc2+ 38. Ka1 and mate on h8 is unavoidable.

c. 36...Qxg5 37. Rh8+ and 38. R1h7#

Apr-05-11  stst: Easy...but with a trap.
Crux is twofold, to launch an uninterrupted attack via Rh8 and also not to let the Bk K flee via f8. Try:
36. Qd6 (to divert the Bk Q, as well as guarding f8 and f6) Now Bk Q has no good place to go
36.....QxQ? or Qxg5P or any where will leave the diagonal that W exactly wishes. Then 37.Rh8+ (now without being captured by the Bk Q, leaving the Bk K the only square to go...Kg7 38. Rh7# thanks to the P at g5

If 36... Qxg5, the same:
37.Rh8+ Kg7
38.Kg7 Rh7, Bk K still has no flee square (f6 guarded by WQ, h6 of course is the WR-file.)

Trap will be 36.Qh3, or the direct failure 36.R8+.

Apr-05-11  sevenseaman: << fyjx: sevenseaman i think the key is Bg8, then zugzwang>

Bg8, Ra7 refutes.

Apr-05-11  CHESSTTCAMPS: <David2009:> I found and tried your link to EGT (page 2) before I read your entire post. From your final diagram in the post (arising from the 36.Qh3 line), white has a more forcing win with 40.Qb7+ Kd6 41.Qd5+.

A related line, 36.Qh3 f5 36.Rh8+ Kf7 37.Qh7+ Qg7 38.Qxg7+ Kxg7 39.R1h7# ends up looking like this:


click for larger view

Apr-05-11  sevenseaman: <Bryan14: <sevenseaman> i think it's Qh4+ / king x e3 and than Bxg5# mate.>

1.Qh4+ Kxe3 2. Bxg5+ Qf4

Apr-05-11
Premium Chessgames Member
  chrisowen: <LIFE Master AJ>

Sorry but endzone intereference with licence to cook:

15 rf2 does nt count.

Pleasant Botvinnik style Kf1?

"Yes, I have played a blitz game once. It was on a train, in 1929. "

Apr-05-11  YouRang: Not too hard once you notice that white's threat of Rh8+/R1h7# is only being stopped by the black queen's defence of h8, and noticing that shouldn't take long.

The objective then is to deflect the queen effectively. White has two reasonable deflection attempts: 36...Qd6 and 36...Qd5. Are either (or both) of them effective?

In either case, the black queen's only flight square where she still guards h8 is at c3. So the question is, "where do we want our queen to be after <36...Qc3>?

If our queen were on d5, we don't have much to do. However, if our queen were on d6, then we can block and attack the black queen with <37.Qf6!>. Black can get in one check with <37...Qc2+ 38.Ka1>, but then it becomes clear that black can only delay mate with some spite checks.

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