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Magnus Carlsen vs Leinier Dominguez Perez
Corus Group A (2009), Wijk aan Zee NED, rd 10, Jan-28
Gruenfeld Defense: Russian. Accelerated Variation (D81)  ·  1-0



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Given 29 times; par: 59 [what's this?]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 15 OF 15 ·  Later Kibitzing>
Feb-06-09  notyetagm: This game won the <<<Sokolov prize>>> as the Best Game Of Round 10.
Feb-06-09  notyetagm: <Eyal: Moves 30-33 are very instructive in terms of piece coordination; compare the position after 29....Rbd8 with the one reached after 33.Rb7 - White has used those moves to beautifully coordinate his pieces, whereas Black's queen and bishop moves only spoiled it.>

29 ... ♖b8-d8

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33 ♖b1-b7

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Premium Chessgames Member
  patzer2: For today's Saturday puzzle solution, we see Carlsen as the future world champion baiting a trap.

The set up move 32. Qb4 (diagram below)

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invites Black to try the Bishop fork 32...Bd3?, which is a mistake. Instead , 32...Be4 33. Bxe5 was necessary.

After 32. Qb7 Bd3? (diagram below)

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we arrive at our puzzle position, with the solution being Carlsen's planned move 33. Rb7! .

The initial point of 33. Rb7! is that continued greed with 33...Bxf1?? loses on the spot to 34. Bxe5! .

The more subtle point is that even after stronger play by Black, as in the game continuation, White still has a winning attack.

Jan-24-15  gofer: Not even close, today...
Jan-24-15  pensiveyaks: But 38 ...Rde8 gives black the lead?So that after 39 Qh6 ,black can defend the 7th rank and subsequently the mate.
Jan-24-15  Cheapo by the Dozen: Over the board I'd try 33 Rb4, because it salvages the immediate material situation and also offers the chance of action on the a2-g8 diagonal. What I don't like about it is that Black's queen can retreat into defense. But if Black tries 33 ... Qa7/Qe7, White has 34 Rb7 to increase the pressure.

33 Nxe5, by way of contrast, seems to fail rather spectacularly, because of lines like:

33 Nxe5 Bxf1
34 Nxg6+ hxg6
35 Bxg7+ Kg8
36 Bxf8 Rxf8
37 Kxf1 Qd1#

And 33 Ra1 simply allows 33 ... Qxb5.

Jan-24-15  diagonalley: <diagonalley>: nul points
Jan-24-15  rogl: < pensiveyaks: But 38 ...Rde8 gives black the lead?So that after 39 Qh6 ,black can defend the 7th rank and subsequently the mate.> After 38 ...Rde8 white simply plays 39. Qf7 with unstoppable mate threats.
Jan-24-15  Cheapo by the Dozen: OK. The closest thing I'll offer to a solution is the slow, partially non-forcing plan of

something takes on e5
check on the long diagonal
check on the a2-g8 diagonal
load up on a rook pinned at f7

I can't foresee all of Black's defenses, but at worst White has even material plus the initiative.

Jan-24-15  Cheapo by the Dozen: OK. That's a miss. I didn't check how powerful the attack was after the immediate Rb7.
Jan-24-15  mig55: I just found the first move Rb7...
Premium Chessgames Member
  Penguincw: I had 33.Ra1 followed by 34.Rfe1. Nothing tactical.
Premium Chessgames Member
  patzer2: Correction: "The set up move 32. Qb2!" (not 32. Qb4 or 32. Qb7) baits the trap for the Bishop fork 32...Bd3? with 33. Rb7! to follow.
Premium Chessgames Member
  patzer2: My failed try was 33. Ra5 which fizzles out to equality after 33...Qc2 =.
Premium Chessgames Member
  patzer2: Instead of 35. Re1, White has a stronger win with 35. Bxe5! when play might continue Bxe5 36. Nxe5 Rxe5? 37. Qxf4! (diagram below)

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when Fritz indicates White has mate-in-seven.

Jan-24-15  Gilmoy: In the 5 seconds I gave myself (as I should be proving a theorem instead of browsing), I thought: all captures are <too obvious>, there are no sacs that smite ... so it's gotta be a quiet positional squeeze like <33.Rb7>. Totally intuition, because it <feels> right. I might be (gasp) getting better at this :)

I did not even notice that the Bd3 is forking the RR. I confess I thought the point was Rxg7 and a breakthrough on the diagonal, not vice versa.

Premium Chessgames Member
  agb2002: White has a bishop and a knight for the bishop pair and a pawn.

Black threatens 33... Bxb5 and 33... Bxf1.

White can try to exploit the pressure along the a1-h8 diagonal with 33.Rxe5:

A) 33... Bxe5 34.Nxe5

A.1) 34... Bxf1 35.Nf7+ Kg8 36.Nh6#.

A.2) 34... Kg8 35.Qb7

A.2.a) 35... Bxf1 36.Ng4 Rd4 (36... Q(R)d7 37.Nh6#; 36... Rf7 37.Nh6+ Kf8 38.Qxf7#; 36... h5 37.Qg7#) 37.Qd5+ Rf7 (37... Rxd5 38.Nh6#; 37... Kg7 38.Bxd4+ and mate soon) 38.Bxd4 Bc4 39.Qd8+ Rf8 40.Nh6#.

A.2.b) 35... Qa8 36.Ng4 with the double threat 37.Qg7# and 37.Nh6# wins (36... Rf7 37.Nh6+ Kf8 38.Qxf7#).

A.2.c) 35... Qe8 36.Re1 and White seems to have enough compensation for the exchange. For example, 36... Bf5 37.Qb3+ Be6 38.Ng4 Bxb3 39.Nh6#.

A.2.d) 35... Qa3 36.Bb2 Qd6 (36... Rb8 37.Bxa3 Rxb7 38.Nxd3 Ra8 39.Bc1 +/ - [B+N vs R]) 37.Ng4 as in A.2.b.

B) 33... Bxf1 34.Re7

B.1) 34... Bxc3 35.Qxc3+ Rd4 36.Nxd4 looks winning due to the double threat 37.Ne6+ and 37.Kxf1.

B.2) 34... Rg8 35.Bxg7+ Rxg7 36.Qxg7#.

B.3) 34... Qd1 35.Bxg7+ Kg8 36.Bxf8 Bc4+ 37.Kh2 Kxf8 (or 37... Bf7) 38.Qg7#.

B.4) 34... Rd7 35.Bxg7+ Kg8 36.Bxf8 Rxe7 37.Bxe7 wins a piece.

Premium Chessgames Member
  Jimfromprovidence: I found the winning response to 33... Rd7 very difficult to penetrate and comprehend.

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<Eyal> posted a winning line back in 2009 beginning with these three moves; 34.Nxe5 Bxe5 35.Bxe5+ Kg8 36.Rxd7 Qxd7.

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The challenge is for white to play and win this still tricky position. (One hint is to look for a line that makes black have to give up a piece to stop a greater threat).

Premium Chessgames Member
  agb2002: I forgot that I followed this game when it was played and the winning move 33.Rb7.

My 33.Rxe5 only achieves equality after 33... Qc2 34.Qxc2 Bxc2 35.Rc1 Rd1+ 36.Re1.

Better luck tomorrow.

Jan-24-15  M.Hassan: "Very Difficult"
White to play 23.?
White is a pawn down and has a Knight for a Bishop

There are several combinations that at first I could not decide which one to choose, taking the epawn, saving the Rook on f1 or others, so I wrote the candidate moves:

I did not have time to go through all variations but decided to go through the one that appealed to me the most.i,e. 33.Rb4

33.Rb4 Qc2
34.Qxc2 Bxc2
35.Bxe5 Bxe5
The position is equal now and White has regained the pawn that he was behind

37.Rc1 Rd2
38.Nf3 Rd1+
39.Rxd1 Bxd1
40.Nd4 Re8
And i can not see beyond this as there are different variations. have to check the game =============
Queen exchanges in my variation, were the main difference

Premium Chessgames Member
  patzer2: <Jimfromprovidence> After 34... Rd7 34.Nxe5 Bxe5 35.Bxe5+ Kg8 36.Rxd7 Qxd7 (diagram below),

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37. Rc1! (diagram below) gives White a decisive attack due to the threat 38. Rc7 .

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After 37. Rc1! here, Fritz 12 indicates strong play might go 37...Rc8 38. Qa2+ Kf8 39. Qa3+ Ke8 40. Rxc8+ Qxc8 41. Qxd3 , winning a piece and the game.

Premium Chessgames Member
  Jimfromprovidence: <patzer2> <After 34... Rd7 34.Nxe5 Bxe5 35.Bxe5+ Kg8 36.Rxd7 Qxd7... 37. Rc1! gives White a decisive attack due to the threat 38. Rc7.

After 37. Rc1! here, Fritz 12 indicates strong play might go 37...Rc8 38. Qa2+ Kf8 39. Qa3+ Ke8 40. Rxc8+ Qxc8 41. Qxd3 , winning a piece and the game.>

There is another line after 37 Rc1 that is quite intriguing, beginning with 37...Qe8.

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Now the question is how white can avoid a bishop exchange with the result being just an equal position. The answer is 38 Bb2! (or Ba1)

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The bishop retreat not only threatens 39 Qxd3 but 39 Qc3. Black cannot just move his bishop and play 38...Bf5 because of that 39 Qc3 threat.

Play it out and enjoy.

It's one of those things that Rybka freeware found that I could eventually figure out.

Premium Chessgames Member
  patzer2: <Jimfromprovidence> Thanks for pointing out the unusual double attack, threatening the unprotected Bishop or positioning for a mating attack, after 37. Rc1 Qd8 with 38. Bb2! .
Jan-25-15  CHESSTTCAMPS: Got the right candidate, but did not get the detail.
Premium Chessgames Member
  patzer2: <Jimfromprovidence> Here's the result of my look at <34.Nxe5 Bxe5 35.Bxe5+ Kg8 36.Rxd7 Qxd7 37. Rc1! Qe8!?> with Fritz 12, when strong play might go <33... Rd7 34. Nxe5 Bxe5 35. Bxe5+ Kg8 36. Rxd7 Qxd7 37. Rc1 37...Qe8!?> 38. Qb3+ Rf7 39. Bb2! Bf5

(39... Qd7 40. Qb8+ Rf8 41. Qe5 Rf5 42. Qh8+ Kf7 43. Re1 Be2 44. Qxh7+ Ke8 45. Qg8+ Rf8 46. Rxe2+ Qe7 47. Rxe7+ Kxe7 48. Ba3+ ;

39... h5 40. Qxd3 )

40. Qc3 Kf8 41. Qh8+ Ke7 42. Re1+ Be6 43. Rxe6+ Kxe6 44. Qxe8+ .

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