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Alexander Goldin vs Igor Efimov
? (1982)
Queen's Indian Defense: Kasparov-Petrosian Variation. Petrosian Attack (E12)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 3 ·  Later Kibitzing>
May-19-07  bakuazer: i unfortunately chose 27.Rf6 and missed 27...Qd3. nice puzzle.
May-19-07  Dr. J: <MostlyAverageJoe> Thanks for your analysis, but I'm unconvinced:

After <27 Rg6, fxg6; 28 Ne6> (your suggestion as better than 28 Qh4), what happens after 28 ... Qf5 or Qh5?

As to your next comments:
<27 ... Qd3; 28 Rxg7+ Illegal rook move from h6.> and <27 ... Qd2 Forced mate in 3 (this is what Qd3 was preventing): 28. Rh8+ Kxh8 29. Qh5 30. Qh7#> sorry, no, the Rook is on g6 in my line

Finally, after your <27 Rh6, Qd3; 28 Ne4> how does White proceed after 28 ... g6?

May-19-07  MostlyAverageJoe: Update on 28. Nh7: yes, it is positively a bad move. 20-ply analysis evaluates it at +2.14, and it dropped a bit from 19-ply (not a good sign).

On the other hand, 28. Ne4 valuation rose to 7.85, while oscillating up to over 10 and then dropping back. Weird. In any case, it produces a major threat of Nf6#. Black will have to exchange the queen for the knight, or play 28 ... f5 (28 ... f6 29.Qg6 mates in 15 or so).

This puzzle seems to be quite difficult for a computer program. Probably the most difficult one for HIARCS since the beginning of my puzzle difficulty evaluation experiments.

Anyhow, here's what appears to be the best effort from both white and black:

27. Rh6 Qd3 28. Ne4 f5 29. Qh5 gxh6 30. Qg6+ Kh8 31. Qxh6+ Kg8 32. Qg6+ Kh8 33. Ng5 Qd7 34. Qh5+ Kg8 35. Re6 Qg7 36. Rg6 Rf7 (from move 29 on, black's responses are forced - any deviation results in a forced mate).


click for larger view

Possible continuation: 37. Nxf7 Kxf7 38. Qxf5+ Kg8 39. Qd5+ Kh7 40. Rxg7+ Kxg7 41. Qxa8 (knight and 2 pawns against queen and 3 pawns - piece of cake).

If anyone can find any holes in the above, please post.

May-19-07  tallinn: Two tactical ideas in the position: Rh6 threatining mate and Ne4 threatening Nf6+ . All this with one hand of white tied to the back (weak base line). How to combine all that for a white win? Like this:

Rh6 Qd3 Ne4 f5 Qh5 gxh Qg6+ Kh8 Qxh6+ Kg8 Qg6+ Kh8 Ng5 Qd7 Qh5+ Kg8 Re6, safe base and no good argument for black against Rg6. Fritz continued with Qg7 Rg6 and game over (Rf7 Qh7+ Kf8 Rxg7 Rxg7 Qh8+ Ke7 Qxg7+).

I had to force Fritz to play f5. He voted for Qd8 instead, and gave its queen after Nf6+.

Goldins Nh7 is weaker but as well sufficient: Rh6 Qd3 Nf7 f5 Qg6 Qd6 (Qd2 is a "blunder" leading to mate) Nxf8 Qxg6 Rxg6 Kxf8 Re5 is the best line leaving white up an exchange.

May-19-07
Premium Chessgames Member
  Gilmoy: I recognized Rh6 in a flash -- it's Marshall's pipe mate: Marshall vs Burn, 1900. Saw Qd3, preferred Ne4 over Nh7, didn't have time to think either one through. Spent more time searching for that URL than on the puzzle itself :)
May-19-07  Justawoodpusher: Saw the first move, but did'nt see it all through. Maybe I should be more patient next time.
May-19-07  MostlyAverageJoe: <Dr. J: ... no, the Rook is on g6 in my line>

OOPS. All I wrote was under impression of 27. Rh6. Too late to cancel that post. Ignore it, please.

27. Rg6 fxg6; 28 Qh4 loses badly, because Qxg5 is not forced:

28 ... Rfe8!


click for larger view

and now the planned checkmate via Qh7 and Qh8 is prevented by black Qg8. White is a rook down, with no mate in sight.

May-19-07  gauer: 27. Rh6 Qd3 <now, instead of> 28. Nh7,

--(white answers with 28. Ne4 f5
----29. Qh5 gxh6
----(29... fxe4 30. Rh8#)
----(29... Qxe4 30. Rh8#)
--30. Qg6+ Kh8 31. Qxh6+ Kg8
--32. Qg6+ Kh8 33. Ng5 Qd7
--34. Qh5+ Kg8 35. Re6 Qg7
--36. Rg6 Rf7 37. Qh7+ Kf8
--38. Rxg7 Rxg7 39. Qh8+ Rg8
--40. Qf6+ Ke8 41. Qf7+ Kd8
--42. Ne6+ Kc8 43. Qxg8+)

May-19-07  MostlyAverageJoe: <tallinn> Your line after Goldin's Nh7 has problems; f5 was also a blunder by the black. See my very first post.

ERRATA: the board shown in my post about <Update on 28. Nh7> is after 37. Nxf7, not before...

May-19-07  Dr. J: <MostlyAverageJoe> Yes, of course your second response is correct and refutes Rg6 completely (oh, well!) Meanwhile, what happens after 27 Rh6 Qd3, 28 Ne4 g6?
May-19-07  gauer: <Dr. J> - checkmate in 7, with 29 Nf6+, of course.
May-19-07  MostlyAverageJoe: <Dr. J: .. Meanwhile, what happens after 27 Rh6 Qd3, 28 Ne4 g6?>

29. Nf6+ Kg7 30. Rh7+ Kxf6 31. f4 Qd4+ 32. Kh1 Qd5 33. Qh4+ g5 34. Qh6+ Kf5 35. Qxg5#

or

29. Nf6+ Kg7 30. Rh7+ Kxf6 31. f4 Qf5 32. Qh4+ g5 33. fxg5+ Qxg5 34. Rh6+ Kf5 35. Qe4#

Other responses to 31. f4 lose faster ...

May-19-07  Takya Kotov: After 27....Qd3 then 28.Rh3 hitting the black Queen. I don't think there is too much resistence possible after this.
May-19-07  realbrob: 27.Qh5 Qf5 (only move) 28.g4 Qc2 29.Re4 Qxe4 (only move I think) 30.Nxe4 White has a queen for a rook and wins. What's wrong with this line?
May-19-07  Skylark: I got 27. Rh6 Qd3 (any other move simply gets pulverised) and 28. Ne4, not 28. Nh7, but both appear to be much better for white. A neat 'quiet' sacrifice, I think.
May-19-07
Premium Chessgames Member
  al wazir: <MostlyAverageJoe:>: What about the move I suggested, 29...Qc3 ?
May-19-07  tallinn: <realbrob: 27. Qh5> You need to give another solution after 27. Qh5 Qd3 as Qf5 is not the only move. Re4? Qb1 and mate does not work there.
May-19-07  bogo78: <al wazir: <MostlyAverageJoe:>: What about the move I suggested, 29...Qc3 ?> The rook retreats to safety, 30Rf1 and now black has to block the mate on h7. the only way to do it is to sacrifice the Q (...30 Qd2 21 Ng5 Qxg5. There is no better way even if the black king tries to escape there is the additional resource Rh8) In view of this i belive ...28 Qxh7 was better.
May-19-07  Werewolf: Isn´t it good 27.Rd1 and then 28.Qh5 with loss of black Queen or mate?
May-19-07  goodevans: <Werewolf: Isn´t it good 27.Rd1 and then 28.Qh5 with loss of black Queen or mate?> Black has several ways to react to 27 Rd1. 27 … Nd4 and 27 … Qe5 both look playable, I think, or he could bring a rook to e8 to prevent white from leaving the back rank. All in all, 27 Rd1 looks less convincing than 27 Rh6.
May-19-07
Premium Chessgames Member
  playground player: I dunno... if I were Black, 27. Ne4 would have beaten me.
May-19-07  D4n: Hmm..Black should have won this one. move # 31, Qe8+ as a reply should have been Rxe8, then it becomes a simple back row mate for Black. As far as the puzzle goes, my first move would have been Qh4! Checkmate in the next turn.
May-19-07  waddayaplay: I saw Rh6 Qd3 and then figured Rh7 would end it. Unfortunately it doesn't lead to anything after g6 (or Qxh7 is also playable) Qh4 Qd4.
May-19-07  schnarre: I found 27. Rh6, though I had experimented with a different line initially (27. Rh6 seemed a little too easy). I tried 27. Ne6 & after 27...fxe6, 28 Raxe6 I was able to claw out a win, though it wasn't a very forgiving line.
May-19-07  TopaLove: <D4n> if 27.Qh4 then Black would have played Qf5 and it´s not mate.
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