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Hannes Hlifar Stefansson vs Josip Rukavina
European Championship (2010), Rijeka CRO, rd 5, Mar-10
King's Indian Defense: Fianchetto Variation. Larsen Defense (E62)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Nov-04-14  cocker: Black should have tried 27 ... Nxb5. In this line White emerges only the exchange up. A very different style of puzzle this week.
Nov-04-14
Premium Chessgames Member
  Bubo bubo: A minor-piece-sac again: 26.Nxa7! Rxa7 27.Bxb6. Now 27...Ra8 28.Bxc7 is hopeless, as White is up by two advanced and connected passed pawns, while 27...Qa8 28.Bxa7 Qxa7 29.b6 Qxa6 30.bxc7 or 27...Nxb5 28.Nxb5 Rxa6 29.Nc7 wins at least the exchange.

If Black refuses the sac, the knight simply retreats to c6, and afterwards White will gang up on the weak Pb6, eventually gaining two passed pawns.

Nov-04-14  morfishine: <26.Nxa7> opens a hole in the enemy line for White's foot soldiers to exploit. After 26...Rxa7 27.Bxb6 no amount of wiggling can save Black

<27...Nxb5> seems the best "try" to eliminate the queening threat, but after 28.Bxa7 the Black Knight on <b5> is the only defender in the area and will soon be eliminated.

*****

Nov-04-14  zb2cr: Missed this one. I saw the possibility of 26. Nxa7, but I also saw 27. ... Nxb5 and was unable to calculate how best to reply and thought to myself, "This is too complicated for a Tuesday."
Nov-04-14
Premium Chessgames Member
  Willber G: <"zb2cr: "This is too complicated for a Tuesday.">

Absolutely.

Nov-04-14
Premium Chessgames Member
  Penguincw: My my. Why are <cg> puzzles so hard this week? Daylight savings must've messed up their schedule by a few days.
Nov-04-14  goodevans: <morfishine: Every game I've seen where White pushes pawns to a6 & b5 and Black has pawns on a7 & b6, has resulted in a White victory> (14 Oct 2014, commenting on Kasparov vs Timman, 1991)

Another one bites the dust!

Nov-04-14  gars: I went all wrong today and yesterday, which never happens! Is suicide an option? I'll think about it.
Nov-04-14  starry2013: I sacrificed the bishop on b6 and won by advancing the a pawn, rather drawn out but I did it. I did that only quite a while after seeing nothing on the other side of the board.
Nov-04-14  slithytove: I think this is a good example of why studying "White/Black to play and win" too much can cause tunnel vision. I (and I suspect others) spent more time on this than necessary because I was looking for a way to win a piece or attack the king. A simple tactic wins two pawns, and the game.
Nov-04-14  Castleinthesky: This is a Tuesday puzzle??? What happened to mindless and easy? I only looked on the king side for solutions, so I completely missed this one. I hope that Wednesday is a gimme, as I normally am feeling overly confident by this time of the week.
Nov-04-14
Premium Chessgames Member
  agb2002: The material is identical.

If the pawn on a7 were a rook then 26.Bxb6 will fork the knight on c7 and that rook. Therefore, 26.Nxa7:

A) 26... Rxa7 27.Bxb6

A.1) 27... Qb8 28.Bxa7 Qxa7 29.b6 Qxa6 30.bxc7 + - [R+P vs B].

A.2) 27... Nxb5 28.Bxa7 (28.Nxb5 Rxa6 29.Nxd6 Qb8 30.Nc4 also looks good for White) 28... Nxa7 29.Qf2 Qa8 (29... Nc8 30.Rb8 followed by a7) 30.Rb7 Nc8 31.a7 Ne7 32.Rfb1 with the threat 33.Rb8 looks winning.

A.3) 27... Ra8 28.Bxc7 + - [2P].

B) 26... Nxb5 27.Ncxb5 + - [N].

C) 26... Nxa6 27.axb6 (27.Nc6 Nc5) 27... Rxa7 28.Nb5

C.1) 28... Rxa6 29.Nc7 Qc8 30.Nxa6 Qxa6 31.Rxb6 + - [R vs N].

C.2) 28... Rd7 29.Bxb6 looks lost for Black (29... Qb8 30.Qa5 followed by a7 and Nc7).

D) 26... Ncxd5 27.Cxd5 Nxd5 28.Qxd5 Rxa7 29.Bxb6 and White wins by pushing the a- and b-pawns.

Nov-04-14  Cheapo by the Dozen: Oh, wait -- there's a simpler refutation to 27 ... Nxb5.

27 ... Nxb5
28 Nxb5 Rxa6
29 Nc7

seems to win a whole rook.

If 28 ... Ra8, 29 Nc7 gives White the exchange plus an advanced passed pawn. 28 ... Rd7/Re7 29 Nc7 has a similar effect.

Nov-04-14
Premium Chessgames Member
  kevin86: At the loan of a piece, white chops off black's pawns and creates two connectors for himself! (I wouldn't have seen it in a month of Sundays) Tuesday- whew, this will be a hard week!
Nov-04-14
Premium Chessgames Member
  scormus: 26 Nxa7 but the outcome is not a clear cut as I'd expect on a Tuesday. Need to see 29 Nc7 leaving W ahead the exchange plus more active play on the Qside.

27 ... 1-0 might have been a bit premature

Looks like I picked the wrong week to start doing the puzzles again. Even yesterday took some thinking about

Nov-04-14  BOSTER: <Castleinthesky: This is a Tuesday puzzle???>.

Looking at <POTD> pos. I noticed that knight c7 had no any free moves, but what was more strange I caught himself that I was thinking not about pos. but about <CG> staff.

I know they are smart in the opening (I read this somewhere).

But my idea was that sometimes, not very often, they want to make a fool of me,when they chose the puzzle like couple weeks ago.

So, studying <CG> puzzle strategy I decided to play vs opponent ,but not vs pos.,or using another words to be in the puzzle mode, what is too far from OTB.

H.SteFANsson (like me), learning a lot from the game vs Baburin, decided that it was not so FANny "to be smarter than me".

And play simple 26.Nxa7 and if Rxa7 27.Bxb6.

Nov-04-14  rickycota: What's wrong with 24... Nxb5?
Nov-04-14
Premium Chessgames Member
  FSR: <rickycota: What's wrong with 24... Nxb5?>

It loses a piece for a pawn after either 25.Rxb5 or 25.Nxb5.

Nov-04-14
Premium Chessgames Member
  FSR: <rickycota: What's wrong with 24... Nxb5?>

It loses a piece for a pawn after either 25.Rxb5 or 25.Nxb5. But I think you meant 23...Nxb5. I don't see what's wrong with that.

Nov-04-14  Marmot PFL: Looks like a King's Indian where white has all the queen side play, while black has done nothing on the king side. Already the simple 26 Nxa7 wins material (at least 2 pawns).
Nov-04-14  JG27Pyth: Lots of "hard for Tuesday" comments... I think this puzzle is an excellent illustration for the maxim: Go wide before you go deep. I managed to it after a small sturggle with myself that went like this: I don't see anything on the king side. Nothing. Nothing... ok, when there's no attack on the king then it's always "trap the queen"... hmmm... she's not getting trapped. Jeez... give up? On Tuesday!? There must be something... hmmm loose pieces? No. Damn. I should give up. No no... look around the whole board... Hey wait a minute... we have a pawn on the sixth rank. Aha! --- And suddenly it's Tuesday easy again.

Now I tend play a swashbuckling romantic style of chess game in which with painfully dull and very timid moves I bore my opponent into swashbuckling romantic blunders. Given my proclivities, the last piece on earth I would consider sac'ing is that N, not from that outpost! But black's position is utterly hopeless after Nxa7, there was nothing premature about the resignation. A very very instructive puzzle IMO. Instructive about seeing the whole board -- and removing self-imposed blinders.

Nov-04-14  Marmot PFL: <Lots of "hard for Tuesday" comments..>

Got it in about 30 sec, and I'm not too good at puzzles. Very often I have to replay the last 5 moves leading up to the key position to get some clues, but not today.

Nov-04-14  R. P. Musante: An instructive puzzle. I like the sound maxim stated by JG27Pyth.
Nov-04-14
Premium Chessgames Member
  Longview: I was focused on the King side trying the quiet move thoughts h4 followed by g4 with action with the B and Q to follow. I did not see the Nxa7 trick to gain a piece...typical for me to miss such a tactic. Instructional as I believe has been said.
Nov-04-14  M.Hassan: 23...Nxb5 instead of <23...Nf6> 24.Nxb5 Qxb5
<if 24.Nc6 to lock the diagonal for Queen escape, then 24...Qxa6> 25.Rfc1 Qd7
And black gains a pawn.
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