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Vassily Ivanchuk vs Nick de Firmian
Biel (1989), Biel SUI, rd 9, Jul-??
Benoni Defense: Classical Variation. Czerniak Defense Tal Line (A77)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
Oct-27-05
Premium Chessgames Member
  Chnebelgrind: This fine game merits some kibitzing
38 ... Kxg5 --> 39.Be7+ and Qxb6

40 .. Kxh6 41 Qxb6 and 42 exf6

Mar-07-19
Premium Chessgames Member
  Penguincw: I should probably attempt this puzzle, since apparently the difficulty levels are all over the place now.

---

Nope, didn't get it.

Mar-07-19
Premium Chessgames Member
  al wazir: This is a Friday- or Saturday-level puzzle. I didn't come close.

After 34. Ne4 Rf1 I wanted to continue 35. Nf6+. But 35...Rxf6 (35...Kh8 36. Qh7#) 36. exf6 Qxd6+ leaves black a piece up.

Mar-07-19
Premium Chessgames Member
  HeMateMe: Got the first move but never saw the black queen being picked off on the 6th rank. That was the tricky part.
Mar-07-19  Walter Glattke: Won ending with 34.Qe6+ Kh7 35.Bxf8 Qxe6 36.dxe6 Bxf8 37.Kg3 Kg6 38.Kf4 Bb4 39.Nd5 Bd2+ 40.Ke4 c3 41.Kd3 b5 42.Nxc3
Mar-07-19  cocker: Ridiculously hard by previous standards.
Mar-07-19
Premium Chessgames Member
  agb2002: White has a knight and a pawn for a rook.

White can incorporate the knight into the attack with 34.Ne4, threatening Ng5:

A) 34... Rf1 35.Ng5 Qg1+ 36.Kg3 Qe3+ 37.Kh4

A.1) 37... Qf2+ 36.g3 Qd4+ 37.Kxh5 Qd1+ 38.g4 Qb1 39.Qe6+ Kh8 40.Qe8+ B(R)f8 41.Bxf8 wins.

A.2) 37... Qe1+ 36.g3 Qb1 37.Qe6+ as above.

B) 34... Qe3 35.Nf6+ Rxf6 (35... Kh8 36.Qh7#) 36.exf6 wins.

C) 34... Kh8 (threatens Bxe5+) 35.Qxh5+ Kg8 36.Ng5 wins.

D) 34... Qb1 35.Nf6+ Rxf6 36.Qxb1 wins.

E) 34... Qb3 (to reply Ng5 with Qd3) 35.Nf6+ Rxf6 36.exf6 wins.

Mar-07-19
Premium Chessgames Member
  agb2002: 35.Ng5 in my line A loses miserably due to 36... Qf2+ and mate in two.

I had the impression that it was quicker than 35.Qe6+.

Conclusion: if you find a winning move DO NOT look for a 'better' one...

Mar-07-19  Whitehat1963: Not even close.
Mar-07-19  saturn2: After the game moves 34.Ne4 Rf1 35.Qe6+ Kh7 I diverted with

36. Nf6

a) 36...Bxf6 37. exf6 Qg1+ 38. Kg3 Qe3+ 39. Kh4 black has no checks like Qe3++ I think that is another reason for 35 Qe6

b) 36...Rxf6 37. exf6 Bh6 38. Be5 Qxe6 39. dxe6 Bf8 (or Kg8 40 f7) 40. e7

Mar-07-19  mel gibson: It took me about 20 seconds to see the Knight move. I could see that it placed Black under tremendous pressure.

Stockfish 10 says:

34. Ne4

(34. Ne4 (♘c3-e4 ♖f8-f1 ♕g6-e6+ ♔g8-h8 ♕e6-e8+
♔h8-h7 ♘e4-g5+ ♔h7-h6 ♕e8-e6+ ♔h6xg5 ♗d6-e7+ ♔g5-f4 ♕e6xb6 ♗g7xe5 ♗e7-d6 ♗e5xd6 ♕b6xd6+ ♔f4-e4 ♕d6-c5 b7-b5 a4xb5 a6xb5 d5-d6 ♖f1-d1 ♕c5-c6+ ♔e4-e5 d6-d7 ♖d1-d5 ♕c6xd5+ ♔e5xd5 d7-d8♕+ ♔d5-c5 ♕d8-e8 h5-h4 ♕e8-e7+ ♔c5-b6 ♕e7xh4 ♔b6-a5 ♕h4-e1+ ♔a5-b6 ♕e1-e3+ ♔b6-a5 ♕e3-c5 ♔a5-a4 ♔h2-g1 b5-b4 ♕c5xc4 ♔a4-a3 ♔g1-h2 ♔a3-a4 ♕c4-c2+ b4-b3 ♕c2-c1 ♔a4-b4 ♔h2-g1 ♔b4-b5 ♕c1-c3 ♔b5-a4) +14.60/41 )

score for White +14.6 depth 41.

Mar-07-19  kkshethin: what is wrong with 34 Qe6 and thus removing rook and forcing queen exchange. looking to pawns strength white will win
Mar-07-19
Premium Chessgames Member
  GerMalaz: 34 Qe6 Rf7
Mar-07-19  TheaN: Thursday 7 March 2019

<34.?>

Oh bollocks. I got as far as playing <34.Ne4> but completely missed the most obvious defensive try. I thought Black was forced to play 34....Kh8? after which the simple 35.Qxh5+ Kg8 36.Ng5 +- wins without resistance.

Obviously, after 34....Rf1 White will have to play accurately to win, even though this is the position White wanted by playing Ne4.

Mar-07-19  TheaN: HAH even my cooked up variation is wrong. After 34....Kh8? simply 35.Ng5 mates, because Bxe5+ BxB+ is check, and mate soon. 35.Qxh5+ wins, but only after 35....Kg8 36.Bxf8. After 36.Ng5, Black can defend with 36....Qb1! and a relatively even game.
Mar-07-19  TheaN: Even so, you've got to admire 40.Bh6+! especially as a time control move. Chucky guarantees that instead of winning Q for RB he wins the Q for R in two moves, and essentially the game.
Mar-07-19
Premium Chessgames Member
  whiteshark: A case of LPDO.

<agb2002: B) 34... Qe3 35.Nf6+ Rxf6 (35... Kh8 36.Qh7#) 36.exf6 wins.> My mainline.

<TheaN: Oh bollocks. I got as far as playing <34.Ne4> but completely missed the most obvious defensive try. ...
Even so, you've got to admire 40.Bh6+! especially as a time control move. Chucky guarantees that instead of winning Q for RB he wins the Q for R in two moves, and essentially the game.>
Exactly my thoughts.

Mar-07-19
Premium Chessgames Member
  Jimfromprovidence: If 36...Bf8, the puzzle remains fiendishly difficult.


click for larger view

White has to not lose a single tempo to prevent ...Qg1+ or even ...Qb1 perhaps.

White to play and win.

Mar-07-19  drollere: i also looked at Qe6+, expecting Kh7 35. Ne4, with the white K in a secure position and a mighty white machine in the center. trading Q's with 35. Bxf8 leads to feeble doubled pawns and a very dangerous pawn on c4.
Mar-07-19  drollere: <Ridiculously hard by previous standards.>

the chessgame admin could do us all a favor by removing the single line of html code that calls the image file "difficulty?.gif". it now seems vexing to so many, that single detail. and it appears to be of nugatory interest to the admin.

besides, i love the variety of human commentary that comes forth when few of us are sure about what to do in the puzzle position.

Mar-07-19
Premium Chessgames Member
  ChessHigherCat: <saturn2: After the game moves 34.Ne4 Rf1 35.Qe6+ Kh7 I diverted with 36. Nf6
[...]
b) 36...Rxf6 37. exf6 Bh6 38. Be5 Qxe6 39. dxe6 Bf8 (or Kg8 40 f7) 40. e7>

Unfortunately, 36...Rxf6 37. exf6?? Qxd6+! followed by Qxf6 (or if 38. Qg3 Qxg3+) and black wins a piece either way

Mar-07-19  King Harvest: I'm enjoying listening to players better than I admit to flailing at this "medium" puzzle lol. Not that I solved it...
Mar-07-19  devere: <drollere: i also looked at Qe6+, expecting Kh7 35. Ne4, with the white K in a secure position and a mighty white machine in the center.> 34.Qe6+ Kh7 35.Ne4 Qd4 leads to a draw while 34.Ne4 Qd4 35.e6 wins for White.
Mar-07-19  saturn2: <saturn2: After the game moves 34.Ne4 Rf1 35.Qe6+ ... 36. Nf6>

<Chesshighercat unfortunately, 36...Rxf6 37. exf6?? Qxd6+! followed by Qf6>

Since the white queen is on e6 37. Qxd6 is followed by 38 QxQd6

Mar-08-19
Premium Chessgames Member
  ChessHigherCat: saturn2: <saturn2: After the game moves 34.Ne4 Rf1 35.Qe6+ ... 36. Nf6> <Chesshighercat unfortunately, 36...Rxf6 37. exf6?? Qxd6+! followed by Qf6>

<Since the white queen is on e6 37. Qxd6 is followed by 38 QxQd6>

You're right, in your line you played 35. Qe6+. I was thinking about 37. Nf6+ in the gameline:


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