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Magnus Carlsen vs Hikaru Nakamura
Tata Steel (2011)  ·  Sicilian Defense: Najdorf. Opocensky Variation (B92)  ·  1-0
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Given 38 times; par: 44 [what's this?]

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sac: 29.Bxh6 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 19 OF 19 ·  Later Kibitzing>
Mar-22-15  Boerboel Guy: What is wrong with 32. Rxf7 ?
Mar-22-15  devere: <Boerboel Guy: What is wrong with 32. Rxf7 ?>

32.Rxf7 Qg5!. It was really hard to see. This is a great game by Carlsen.

Mar-22-15
Premium Chessgames Member
  diagonalley: it takes a game like this to demonstrate just how far up the mountain guys like carlsen are! all <diagonalley> can do is gaze up in awe
Mar-22-15
Premium Chessgames Member
  lost in space: I tried 27. Nxe6 Rxe6 28. Qh3 Rce8 29. Rhg1 Rxg6 30. Rxg6 Nxg6 31. Rd1 Ne5 32. Nd5

and thought that white is better - but this is no puzzle soution but a normal line.

No idea if this is sound or not.


click for larger view

Mar-22-15
Premium Chessgames Member
  Reisswolf: Was the start of the sequence forced? Was 27..Bxd5 forced?
Mar-22-15
Premium Chessgames Member
  scormus: A great game by Magnus. Naka was right, the Najdorf does not leave B much room for error.

My sympathies with those who chose 27 Nxe6. In fact my engine picked that over Nd5. <lost in space> is objectively on the right lines with that and the follow up

However, the engine gives 27 Nd5 is completely winning for W if B makes the natural recapture 28 ... Qxd5 (the game move). It recommends instead (the hard to spot)28 ... Rc4 followed by 29 Ne6 Rg4 as "minimising the damage".

Mar-22-15
Premium Chessgames Member
  lost in space: <Was 27...Bxd5 forced?>

I think so.

Let say Black plays 27. Nd5 b5 (other moves might be a bit better, but not taking the knight allows the following sequence:

28. Rxh6 gxh6 29. Rxf8+ Rxf8 30. Ne7+ Kg7 31. Bxh6+ Kxh6 (Kh8 is not better) 32. Qh4 Kg7 Ne6#


click for larger view

Mar-22-15
Premium Chessgames Member
  lost in space: <However, the engine gives 27 Nd5 is completely winning for W if B makes the natural recapture 28 ... Qxd5 (the game move). It recommends instead (the hard to spot)28 ... Rc4 followed by 29 Ne6 Rg4 as "minimising the damageď>

Interesting. Will doublecheck that with shredder....

The position to be checked is this:

27. Nd5 Bxd5 28. exd5


click for larger view

with Black to move.

Mar-22-15
Premium Chessgames Member
  morfishine: I had the insane move too early: <27.Rxf8+>

*****

Mar-22-15  wooden nickel: This Opocensky Variation worked similar to an English Attack. The move 27.Rxf8+ looked good at first,
after forcing Kxf8... then saccing a Bishop (or even the Rook) on h6! i.e. 28.Bxh6 gxh6 29.Rxh6


click for larger view

However Black doesn't have to accept and plays 28. ... Rxc3!

Mar-22-15
Premium Chessgames Member
  Penguincw: Ah, trip down memory lane. I remember watching this game live, in my first days on <cg>, which was 4 years ago.

Anyway, my long term memory isn't as good as I thought, as I went for 27.Rxh6. :|

Mar-22-15
Premium Chessgames Member
  lost in space: After hours of calculation my comp - running shredder 12 - came up with the following lines as best after 27. Nd5 Bxd5 28. exd5


click for larger view

shredder 12, d=22

A: +2,36; 28...Qa4 29. c3 Qc4 30. Bf4 Rc7 31. Ne6 Rxe6 32. dxe6 Qxe6 33. Bxe5 dxe5 ...

B: +3,08; 28...Rc4 29. Ne6 Ra4 30. a3 Rg4 31. Qf2 Rxg6 32. Rhg1 Rxg1 33. Qxg1 Rxe6 34. dxe6 Qd5 35. Bxh6 Qxe6 36. Qg2...

C: +5,2; 28...Qb4 --> should transpose to line A after 29. c3; have to let the comp run deeper.

Very complex. I never ever would have considered allowing Ne6 and claim this as better than Qxd5 were Ne6 is not possible directly.

What you can see is how good these 2 guys are able to play chess

Mar-22-15
Premium Chessgames Member
  whiteshark: I tried hard to make <27.Rxh6> work but failed. You have to find a lot of only moves on both sides to finally get a ♗+4♙ : ♘+3♙ endgame for white.
Mar-22-15
Premium Chessgames Member
  whiteshark: So here's the comp.line: <27. Rxh6 gxh6 28. Nxe6 Rxe6 29. Qh3 Rce8 30. Rxf8+ Kxf8 31. Qxh6+ Ke7 32. b4 Qc7 33. Nd5+ Kd7 34. Nxc7 Rxg6 35. Nxe8 Rxh6 36. Bxh6 Kxe8>


click for larger view

Mar-22-15
Premium Chessgames Member
  thegoodanarchist: The choices for first move are quite limited, since White must stop ...Qxa2#

But even so, does White check on f8 with the rook, or does he block the Black Bishop's attack of the a2 square?

And after that, it gets really complicated :)

Mar-22-15
Premium Chessgames Member
  chrisowen: Jibs d5 or chest e6 rind rine on green ave

gauge e6 spark soar knight covenant rooks at wheel huffle and shuffle sight a c2 too far away churlish behaviour lets white prove the coup de grace e6 also an option although more at drawish black can hold ave l0 in d5 reveal backs blip delve spin band job pov move masquerade around a monarch g8 and angle on g3 back queen's a fag pin crash g6 around gangway plank black gutoff.

Away a gog question of g3 a fashion hot to despatch monarch g8 at enact gave can garcon a cycle on gun back accumulate by small degrees cage want gnaw d5 away as light e6 too ta boat at a boon slate take hod dish d5 midfield general essay hod dump carrier bad dosh spur d5 on key up caw worn roof ravens eye balls e6 up only drawish i have sight an c3 also gives way for c2 enact rook angle on creative gesture am cash the chip d5 from fur ball etc further bind cat hug do c3 hot dot hud scope ever frugal put away ho doot d5 train e6 less as pretty still good for a plus though cover e6 tres bonn creak in cajole knight cross

exclaim ash d4 ave stay put duty ramble give 5d as scripture padre h6 ave came good light have big plus low at up a flid 5d dew on e6 the flowers head delve basic cause saint h6 dons the mask in query back a do 12..a5 good or not?

live for won as have clink an fly dipoff aim dead ave try deem a flight as cad afraid on key am route flow c5 or betcha

grin e5 piggy rates eel away black has more chances than a5 queen's a fag pin tail up c3 have decadent finish him off real damage given h6 affable good demise a bet et tu brute see at bid often eg liege nt in beck and call hocus pocus h6 aim good an lip picture

efface off a glean i dutiful crum pivot able mid have ogles better glide a do g3 queen's a fag pin devious ploy day ref slipshod flurry recalled it now in ebullient ash farm and find try feel eline a key do oomph alive cockles and muscles c8 sight a c2 bone of contention whether bind to queen's a fag pin am get engine at c3 knight dice 5d actually am good routes curious bind heads in evermore a king culpa

by g8 caught at crossfire bus a1 kings safe tickles f8 at enact furlongs bishop gets an attack g7 push on glorious ascension select riven g6 up ply am zander like queen's wiggle a pin frag ment grenade g8 bombs away calm d5 first though and then sac one h6 cake walk chaff along headway am i d4 at e6 rove spur d5 one for mark off in bury the hatchet padre h6 a key flake huffle and shuffle g8 over kingside target g7 and alf a win.

Mar-22-15
Premium Chessgames Member
  chrisowen: Way there a mind over straight port of call d5 only c5 queen's a fag pin each ave way bet better glide than a5 shin allow am rook f1 lump have the throat corner off one slide away la mind rove from afar sight an rich ave ore mind you dig deep seize the alleys when alls said and done light more active and has space h6 at the crunch point honour ave hope c5 for me thod a5 slightly worse off allow e6 straight away or icicle knight rook first and then d5 ash an bog wells g6 a bone at the throat act camp duo call d5 or chest e7 erm cull an dig rater g6 lide use as key push g8 have small room chest guffaw ash as hearts an g3 queen's a fag pin lavish am rock i buffet around if ive this right h6 after knight dare 5d see one deliver am on alive no more a match bid for one fanfare final call d5 over stern e6 chimney um i net rook as slide f1 air bin f7 may be an out post a vet for hope e5 too late maybe an jugular 27.Nd5 josh dip around jatha h6 bash job head jam he just jog home hi jinx a cut i curry favour ave a hive i hang job g8 jip have jot head jowl.

Long ave joshi h6 a hob shaolin warrior as put kind to the sword g6 as plug line low god bash over it was in change ogle an vindicate a hod carrier am on g3 queen's a fag pin g7 he aorta float head ja ho ha love a mosh pit ok over quosh and squash padre horace goes for the ski lift g8 a ship that on ive a cream h6 pawns hay ogle knight drive a link deeps the river tickler dangle dagger trues a delight rooks ha feel good to queen's a fag pin am g6 engine agrees magnus has right forsight knight forsooth heavens above h6 comes like a g6

rocket g7 as too good dence thicket draws out cease and decist ramble give spark dilly and dally doors a dunce head dupes e6 a dearth of options douche bag drakes man ship deals denote droopy g7 as drains debts dotes g6 and alf doves g6 offer little resistance it dint around g7 as hind hand head had hud g7 dash held hides h6 a dish dosh hoe an down he good dish head enough dip d4 free ghost queen's a fag pin borough deem as trough ive dead rook flow as hone i deem at seconds 27.Nxe6 energy rates encircle op at raves effort he gypt shun d5 or chest e6 reads effort more effect

effronts exactly brave g6 a gonner drive though packs e6 black rook very central cords cut gordian knot black as put an good shape probably level oh drome exacters ave ebbing it in ecumen off at hive spark burn effigy rates egghead g8 change i shall demonstrate on the run am vindicate rooks out of the equation over am either bind have enlists c8 and e8 baby eminate epicure equates the vow equator as errand g7 boy ersatz essays glorify oh door d5 eunich as c1 amp ive wages h6 everest eyeball climb etc a net back bet inflate go get het up jet set pet quote a g8 as reticence ogle tete a tete vet wet g7 as yet i mount g6 as tech tee off g7 and the point f6 at weak monster h8 queen's a fag pin tether tie tell as telepathy roi dip a tent tepid e6 cool terrace teaser vantage off re you have l0 drome h6 a tree tex mex plough ave eg hoof flush g6 et tu brute g8 fog head he fang eh fig f6 lunge fades a dank and dusty coil sank save fan desk a day am awesome 27...Bxd5 28.exd5 Qxd5 29.Bxh6 cxh6 30.g7 Be7 31.Rxh6 Nf7 32.Qg6 Nxh6 33.Qxh6 Bf6

34.Qh8+ muffles headways an glues harangue her high hashead majesty rof loam hersuite vow evermore a culpa veer ash herder the word an good guffaws huffles away am light route a recind h8 am batch i sell off hashhoof cattle product g8 ash floater 34...Kf7 35.g8Q+ a doubt i gangways over ignoble ghosthead one done garrelous ave no chance for escape a dish cook the gooseegg hallways card it arduous in aim a length a

gog quest over near enough i gamblers for a monarch vats ave g8 an ja good ay am gg hoof act shunt 35...Rxg8 36.Qxf6+ addendum sight rook e1 ellucidate ergo a floats again fluffs the bud back to the wall

erstwile go casctle build draw a line at the sand e8 dune buggy rates caught nod invest hammer can ryhme no pause for thought free one foilable monarch e8 win mission over a flounce away am light vow an fervious flight sift rook as fare win e1 pour on scorn f6 check forgos the ghost

headless cause final fanfare e8 out slides 36...Ke8 37.Re1 wins queen's a fag pin a d5 afflict rumble over e5 off rook g8 also dance

Mar-22-15  engineerX: what is this random nonsense by chrisowen?
Mar-22-15
Premium Chessgames Member
  agb2002: White has a bishop and a knight for the bishop pair.

Black threatens 27... Rxc3 28.Nxe6 (28.b(Q)xc3 Qxa2#) 28... Rxg3, winning.

The first idea that comes to mind is 27.Rxh6 but is met with 27... gxh6 (27... Rxc3 28.Rh8+ and mate in two).

Another option is 27.Nxe6, stopping the threat, removing one of Black's best pieces, enabling d5 for the other knight and preparing an eventual Bxh6.

That's all I can do today.

Mar-22-15
Premium Chessgames Member
  scormus: <lost in space> you and shredder are working well. On a deeper search (d=22), I get 27 Nd5 comes out better. Then ... Bxd5 28 exd5 Qa4 29 c3. After a lot of thought the engine has difficulty between ... Qc4 and ... Rc7. I suspect a human player would choose ... Rc7 to keep some control on that rank, with the option of .... Qd7 as well.
Mar-23-15
Premium Chessgames Member
  patzer2: <Scormus><However, the engine gives 27 Nd5 is completely winning for W if B makes the natural recapture 28 ... Qxd5 (the game move). It recommends instead (the hard to spot)28 ... Rc4 followed by 29 Ne6 Rg4 as "minimizing the damage">

<lost in space>:<After hours of calculation my comp - running shredder 12 - came up with the following lines as best after 27. Nd5 Bxd5 28. exd5 ...B: +3,08; 28...Rc4 29. Ne6 Ra4 30. a3 Rg4 31. Qf2 Rxg6 32. Rhg1 Rxg1 33. Qxg1 Rxe6 34. dxe6 Qd5 35. Bxh6 Qxe6 36. Qg2...>

Verified the analysis of <lost in space> on Deep Fritz 14 to 24 depth on an i7-4790 running at 3.6GHZ and expanded on it to verify the win:

After <28... Rc4!? 29. Ne6 Ra4 30. a3 Rg4 31. Qf2 Rxg6 32. Rhg1 Rxg1 33. Qxg1 Rxe6 (not 33... Qxd5?? 34. Rxf8+ Rxf8 35. Qxg7#) 34. dxe6 Qd5 35. Bxh6 Qxe6 36. Qg2 > (end of <lost in space>'s shredder 12 analysis), my analysis on Fritz 14 continues 36...Qc4 37. Bg5 Qb5 38. Qh3 Nf7 39. Qf3 Qd7 40. Qd5 Qe8 41. Bd2 Qe7 42. Rh1 g5 43. Re1 Qf6 44. Qxb7 Bg7 45. Re8+ Kh7 46. Qe4+ Qg6 47. Qh1+ Nh6 48. Re7 Kh8 49. Kb1 Be5 50. Qh3 g4 51. Qxh6+ Qxh6 52. Bxh6 g3 53. Be3 g2 54. Rxe5 dxe5 55. b4 with mate soon to follow.

Mar-23-15
Premium Chessgames Member
  scormus: <patzer2> thanks for the in-depth analysis. You and your machine did a lot of work. <several hours on an i7-4790> is a serious amount of processing. Well done!

Yes, I followed your line to 37. Bg5. At this point my engine has 37 ... Qc6 and evals it at +2.43/d=23, admittedly with just 10 mins for the move. After 37 ... Qb5 it gives 38 Qh3 Qd7 39 Qb3+ Nf7 40 Qd5 (+2.59, d=25), having first picked 38 ... Nf7 and later switched to ... Qd7 on deeper search.

IMHO it looks won for W simply by virtue of the material and positional superiority after B needed to give up the exchange (37 ... Rxe6) in order to stay in the game. But I doubt if there is a forseeable forced #. Instead it will go to an endgame.

I think what this shows is just how amazing the OTB play was, and Magnus' ability to see through the forest of complication when playing 2 Nd5.

I think it shows that no amount of computing effort will advance the quality of our assessment of such positions unless that very considerable human brain time is spent. But that is my personal view and one I know not everybody agrees with.

Mar-24-15
Premium Chessgames Member
  lost in space: 27. Nd5 Bxd5 28. exd5


click for larger view

shredder 12, d=24 (deeper run)

A: +3,16 28...Rc4 29. Ne6 Rg4 30. Qf2 Rxg6 31. Rhg1 Rxg1 32. Qxg1 Rxe6 33. dxe6 Qd5 34. Bxh6


click for larger view

B: +4,02; 28...Qa4 29. c3 Rc7 30. Qf2 Qd7 31. Ne6 Qc8 32. Nxc7

C: +4,66; 28...Rc7 29. Ne6 Rxe6

<scormus> seems to be right

Mar-24-15
Premium Chessgames Member
  lost in space: 27. Nd5 Bxd5 28. exd5 Qxd5 (?)


click for larger view

shredder 12, d=18: +5,9

29. Bxh6 gxh6 30. g7 Nf7 31. gxf8(R)+ Kxf8 32. Nf5 Re6 33. Rhg1 Ke8 34. Qg8+ Kd7 35. Qxf7+ Kc6 36. Rd1 Rc7 37. Qxc7 Kxc7 38. Rxd5 Rf6


click for larger view

Mar-24-15
Premium Chessgames Member
  lost in space: with d=22 we have the same line but 38...h5 (instead of 38...Rf6. The mayor difference is the evaluation : +9,78
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