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Levon Aronian vs Hikaru Nakamura
Zurich Chess Challenge (2014), Zurich SUI, rd 4, Feb-02
King's Indian Defense: Fianchetto. Panno Variation (E63)  ·  1-0



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sac: 39.Rxg7 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
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Premium Chessgames Member
  patzer2: Wasn't it Jack Benny who claimed to be 39, even though he was clearly older?

In this case, (43. ?) claims to be (39 ?). Solving a Saturday puzzle at blitz speed makes me feel younger.

Feb-28-15  Edeltalent: 39.? White to play

Is this a misprint, or are we joining the action a couple of moves late? Black's king is already on the ropes, and I see nothing wrong with simply 39.Rf3+ Ke4 40.Qg4+ Rf4 41.Qxf4# or 39...Kg5 40.Rg3+ Kf4 41.Qg4#

Feb-28-15  wooden nickel: An interesting line would be
39.Rb8 Qc7 40.Rxf8+ Bxf8 41.Qb2+ Kg8 42.Rb8 Rxa7 43.Bxa7 Qxa7 44.Rxf8+ Kxf8 45.Qh8+ Kf7 46.Qxh7+

click for larger view

Thanks for the correction <Once> and nice remark! <patzer2>

Feb-28-15  CHESSTTCAMPS: White is down an exchange and a pawn, but black's king has been drawn into a mating net, with none of black's pieces in position to block checks from white's major pieces. This suggests working a ladder mate towards the h-file.

39.Rf3+ Kg5 (Ke4 40.Qg4+ Rf4 41.Qxf4#) 40.Qg2+ Kh4|h5|h6 41.Rh3# and the bishop plays a key role.

Feb-28-15  goodevans: Damn! I didn't even get the "easy" puzzle today. I went with <45.Qg3+>, which is mate-in-4, instead of the more economic mate-in-3 of the game.
Premium Chessgames Member
  Penguincw: I also went for a mate in 4 with 45.Qe3+ Kf5 46.Qe5+ Kg4 47.Rg3+ Kh4 48.Qg5# 1-0.

Technically, that's a mate in 5, as 45.Qe3+ Kg4 46.Qh3+ Kf3 (same position) 47.Rf3+ Kg5 (47...Ke4 48.Qg4+ Rf4 49.Qxf4# 1-0) 48.Rg3+ Kf4 49.Qg4# 1-0.

I wish I saw the puzzle faster, but when the king's in the middle of the board surrounded by 3 attacking pieces, one has to be careful and calculate all the way through.

Feb-28-15  gofer: I'm with <Once>. I knew the POTD was a mistake as it was a Tuesday level mate in 3. But I suppose I can live with a mistake like that once in a while, we are all human. It is a little surprising that <CG> haven't corrected it yet though...!
Feb-28-15  dfcx: What a gift for Saturday!
39.Qg3+ Kf5 (Ke4 Qe5#) 40.Qe5+ Kg4 41.Rg3+ Kh4 42.Qg5#
Feb-28-15  dfcx: I see CG was asking for the move 39.? but instead put the position for 45.? on the front page.
Premium Chessgames Member
  Sally Simpson: Once has it right.

Today's puzzle was meant to start here with White to play.

click for larger view

Good. Such small mistakes can be a blessing in disguise.

I wonder how many solvers remembered it was Saturday, saw the easy finish, but wavered because it was so easy and looked again to see what was wrong with it.

I've seen players allowing their confidence to be undermined by who they are playing but never a particular day in the week.

Personally I'm not in favour of puzzles following a difficulty sequence. When I gave pages of puzzles in the past I 'pick and mixed'. 1st one easy, 2nd Ok, 3rd a real stinker, 4th easy, 5th hard...etc.

In a game you will get faced with simple-dimple combo's and tough nuts. You cannot predict where and when these position will pop up. So it's best to approach each position with an open mind and not be guided what number the puzzle is or what day of the week it is...Monday, sac my Queen.

But this Monday-Sunday difficulty is a tradition on here and I love traditions so no real beef from me.

My Solution:

39.Qg3+ and mates. It was the first line I looked at so I stayed with it.

Then I remembered it was Saturday......... :)

Premium Chessgames Member
  patzer2: <dfcx: I see CG was asking for the move 39.? but instead put the position for 45.? on the front page.>

Assuming this is the case, here's a look at 39. ?

click for larger view

(position above after 38...d5) with Fritz 12:

<39. Rxg7!!> This begins a pursuit combination to chase and mate the Black King.

White can also win with 39. Qd1! when play might continue 39...Be5 40. Bd4 Qf6 41. R3b6 Qf5 42. g4 Qf4 43. Bxe5+ Qxe5 44. Qd2 Rae8 45. Rb1 Kg8 46. Qh6 Qh8 47. Qh1 Rd8 48. a8=Q! Rxa8 49. Qxd5+ Rf7 50. Qxf7#.

<39... Kxg7 40. Bd4+! Kh6>

If 40... Kg8, then 41. Qe7! Rf7 42. Rb8+ Rxb8 43. axb8=Q+ mates soon.

If 40... Kf7, then White wins with 41. Qe5! when play might continue 41...Qc1+ (41... Qe6 42. Rb7+ ; 41...g5 42. Qf7+ Ke8 43. Rb8+ ) 42. Kg2 g5 43. Qf5+ Kg8 (43... Ke8 44. Qe6+ Kd8 45. Rb8+ Kc7 46. Be5#) 44. Qe6+ Rf7 45. Rb8+ .

<41. Qe3+! Kh5 42. g4+!>

White can also win with 42. Qe5+! when play might continue 42...Kg4 (42... Rf5 43. g4+ Kxg4 44. Rg3+ Kh5 45. Rh3+ Kg5 46. Qg3#; 42...g5 43. g4+! Kxg4 44. Rg3+ Kh4 45. Qxg5#) 43. Qe2+ Kh3 44. g4+ Kh4 45. Qe7+ g5 46. Qxh7+ Kxg4 47. Qh3+ Kf4 48. Qf3#.

<42... Kh4 43. Qh6+ Kxg4 44. Qh3+ Kf4 45. Rf3+! 1-0> Black resigns as it's mate-in-two after 45...Ke4 (45... Kg5 46. Qg2+ Kh6 47. Rh3#) 46. Qg4+ Rf4 47. Qxf4#.

Premium Chessgames Member
  patzer2: <Sally Simpson: ...My Solution: 39.Qg3+ and mates> Mine was 39. Qh2+ with mate-in-five.
Premium Chessgames Member
  Jimfromprovidence: With the bishop covering a7 I did not think twice about 39 Rb8.

click for larger view

An interesting variation off of this line is 39...Qc7 40 Rxa8 Rxa8 41 Qb5!

click for larger view

This threatens 42 Qb8+. If 41...Rf8 then 42 Qxd5, below, clearing the way for 43 a8Q.

click for larger view

Premium Chessgames Member
  chrisowen: Ive live wire and weave a path free queen,

and castle apply in f3 or sooth sayer am h3 at f3 both mate soon man we vilificate rook an g7 at wins on the spot mop up job from here on in jail she no h3 at we kind over port of f3 call foot the bill as have rake skew mission select brave mind manage of f3 re you ave came light down slide across at b3 roster ko f3 mate in two for one in lew,

sic kids of an ilk message goof try ball etc rook at win scathe g7 as error in mind d5 queen as lady it's good d5 better glide for bind engage at board it ardent in aim rat a tat tat gun boat feather boa banana g7 skin a boon d5 hope effect flush a toe queen c6 after clinch hod effect carrier flinch over as put c6 in d5 better guild the lily drive,

message for migrant rusty castle b7 leave in a ghoul g7 as slide off away in light arms be a goofball gives up the ghost ar fish b7 slide good in safe got rook good game thod carry i alight b7 rook ford river sparks g7 and d4 should win down am foot cat iffy oh door it book in a slot takes at down racy another bind fat jab b7 cab job g7 drive bash have nip and tuck until d6 elevate arm i d5 as took touch free queen or b3 rook,

trickle away in f3 light sway missive h8 gets the run around arm had f4 an f3 air free ball etc rook at wins i attic b7 a key winch a g7 rinse off rook watch in wry band call of the wild d5 up on time at infer tile,

ground off for one on flight aim camp i gleans an cap castle g7 as got dipoff a go have good food for thought it edacious in.

Feb-28-15  Bycotron: I must be missing something obvious, this seems way too easy.

39.Qf3+ (the most forcing move)
39...Kg5 (forced)
40.Be3+ Kh4
41.Qg3+ Kh5

or: 40...Rf4 41.Qxf4+ Kh5 42.Qg5#

What did I miss? This is more of a Tuesday solution...

Feb-28-15  Bycotron: Oh, I see the problem. The puzzle shows the wrong position! :( Alas, 39.Rxg7! would have been much harder and much more rewarding to find!
Premium Chessgames Member We are very sorry for a technical error here.

The position intended is 39.? but a different position was displayed on the homepage.

It's a bit late but we corrected the error. Again, our sincere apologies.

Feb-28-15  SatelliteDan: Yeah, saw the error earier CG. Just didn't to bother to mention it. None of us are perfect.(especially when it comes to chess).
Premium Chessgames Member
  Longview: CG must have fixed the position by the time I got to it. First Saturday solved for me. Saw the 39. Rxg7 sac and once the 39....Kxg7 occurs it is all about natural / forced for there. Covered well by others.
Feb-28-15  BxChess: Life is strange when you can be dissappointed to solve a Saturday puzzle. I solved the original posted position from the end of the game. By the time I checked back the correct postion was displayed. I solved it also, but I must confess I realized that there had to be an exchange sacrifice to match up with the erroneous position. This was a big hint. I did see the follow up moves so I can take some points for the day. I anticipate a more challenging struggle for Sunday.
Premium Chessgames Member
  patzer2: The opening for the first 9 moves follows well established theory.

White's 10. d5 = is not often played but solid. Yet after 10...Na5, as in G Forintos vs F Roessel, 1958, doesn't seem to offer White much of an advantage.

Maybe 10...b4 = to as played is just as good as 10...Na5=, but after 10...Na5 11. Nc2! White seems to get a small plus that leads to a lasting advantage and initiative.

After only a few moves, White has practically a won position with 17. a3! to .

Could this be a game won with by White with stronger home opening preparation?

Mar-01-15  SimplicityRichard: <patzer2> Indeed. Your analysis agrees with mine. However, sticking to 10...b4, the text move that is just as good as 10...Na5, I thought that the critical move for Black's eventual loss was 13...cxd5.

I feel that this move whilst a good move in other King's Indian Defence positions, is weak in the Panno Variation, probably because it somewhat enlivens the prospects of White's Fianchettoed Bishop at g2; and in fact, that is how the game was lost.

Instead of 13...axd5, better would have been 13...c5. I opine that ...c5 ought to have been played on move 12. And when I make these suggestions, I am obviously consulting "software". From 13...c5, the game might continue, 14.Nb3 Nd7, 15.Be3 Qb6, 16.f3 Re8, 17.Nf4 Nxb3, 18.axb3 Ne5, 19.h4 a5, +\=(0.06).

And Black has an easy game. With regard to Aronian having prepared an early d5 thrust, I really couldn't say.#

Mar-01-15  SimplicityRichard: That's "Instead of cxd5..." not axd5.

I have also researched quickly and found this game, <Hector Decio Rosseto v. Mikhail Tal (1958)>.

It appears the 10.d5 thrust in question is not unusual.#

Premium Chessgames Member
  patzer2: <SimplicityRichard> I agree 13...c5 looks like an improvement. However,instead of the software line 14.Nb3 Nd7 15.Be3 Qb6 16.f3 = (diagram below),

click for larger view

Maybe White can improve slightly with the natural human move 16. f4 (diagram below)

click for larger view

with a stronger grip on the center and an extra tempo for attacking chances against the Black King side.

Mar-01-15  SimplicityRichard: <patzer2> Absolutely! I favour an attacking style, and have a penchant for pushing the f-pawn as White. I would play 16.f4 in that position; and especially in view of the fact that Black's plans in the Panno Variation are Queenside expansion. And therefore, preparation for a Kingside assault in the Black camp is in order.

"Stockfish 5" now recommends 16.Be3, but I must agree with you and push f4, for the reasons you've outlined.#

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