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Alex Astaneh Lopez vs Eric Schiller
Tradewise Gibraltar (2012)  ·  Zukertort Opening: Grünfeld Reversed (A49)  ·  1-0
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sac: 42.Rh8+ PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
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Feb-10-12
Premium Chessgames Member
  chrisowen: In well it is troo key da queen infiltrate it her domain or

inceed rh8 plo very is it catarrhs in drawish queen lizard d2 or

c1! Whale tale in escort d2 zoom a english approach in he westle

king low top in queen bill close ties I wish too king green man

swallow in corner Hippocrates it oath in 'as a microphone

physician' any hat burn black bishop port you nit your <h8 h6+

g6+> triple tango. Nf3 you lap eat in 5g to nale in king along h7

again work it queen ok I a telecommunicate hindered higher ground

pestle and mortar knight win pedestal on double quick it ride

almight awesome dove ring changed queen in doctor rear octagon

nesh rook h8 schlafli draw loafer too? Do your wurst...

Feb-10-12  psmith: I’m looking at 41. Rh8+ Kxh8 (41…Kg7 42. Rg8+) 42. Qxg6 Qe4 43. Qf6+ Kg8 44. Ng5 hxg5 (44… Qb1 45. Qf7+ Kh8 46. Qf8#) 45. Bxe4 Nxe4 46. Qxe4 should win. I am sure I’m missing key defensive resources for Black. Maybe this is all just unsound. I haven’t spent much time on this, but I’m going to peek now.
Feb-10-12  psmith: Ah, I see I was not alone in my folly... But I won't delete my errors!
Feb-10-12  Memethecat: <once> many thanx for your advice. Your right of course, you have to pick your battles, but spotting which position deserves 20 mins of analysis ain't easy & I find it difficult to achieve the same depth of concentration. " You didn't get it!" I think your being modest, if you spent as long as I did on it you would have solved it many times over. Besides my solution was not verbatim, though I did have the right moves in the right places (good enough for me) I think the reason todays POTD caused people problems was the 1st move wasn't the usual forcing type move .
Feb-10-12  psmith: (And in my line 44. Ng5 just loses to Qf5... a bit blind today -- as most days!)
Feb-10-12
Premium Chessgames Member
  dzechiel: White to move (41?). Black is up a pawn. "Difficult."

My thinking was almost exactly like <PhonyBenoni>'s. I saw that there would be a rook sac in order to allow the white queen to penetrate, but I wanted to make it right away, rather than prep with 41 Qd2.

A swing and a miss for me today.

Feb-10-12
Premium Chessgames Member
  tatarch: Good puzzle.

Why not 34...Bxd3?

Feb-10-12
Premium Chessgames Member
  James D Flynn: My first thought was 41.Rh8+ Kxh8 42.Qxg6 Now I see 2 defensive tries Qe4 and Be8: A 42...Qe4 43.Qf6+ if Kh7 44.Qf7+ Kh8 45.Nh4 Qh7 46.Ng6 and wins the Q for a minor piece else if Kg8 44.Nh4 Qh7 45.Ng6 Qg7 46.Qd8+ if Kf7 47.Nh8+ wins the Q or Kh7 47.Nf8+ Kh8 48.Nxe6+ Qg8 49.Qf6+ Kh7 50.Nf8+ wins the Q.

B 42....Be8 43.Qxh6+ Kg8 44.Bh3 Bf7 45.Ng5 Qe8(ord7) 46.Nh7 and Nf6 next either mates or wins both Q and B.

But what if Black doesn't accept the sac 41....Kg7 42.Qd2 which I will examine after lunch along with the best move 41.Qd2.

Feb-10-12  Crispy Seagull: Note to chessgames.com for POTD games... don't put things like "rook sac: 42.Rh8+" right under the java window when the puzzle position is move 41 ;)
Feb-10-12
Premium Chessgames Member
  Once: <Memethecat> A couple of chess writers have looked at this. Take a look at this from Dan Heisman...

http://www.chesscafe.com/text/heism...

From memory, Jeremy Silman also covered something similar in "How to reassess your chess". But I can't lay my hands on my copy right now, so I can't quote it.

Which is a little worrying as it's one of my favourite books. Maybe I've leant it to someone...

Feb-10-12  abuzic: <41.Qd2 Qb4 42.Rh8+> this is the sac theme of today's puzzle.
Rybka prefers 42.Ng5+ and states mate in 8:
42.Ng5+ hxg5 43.Qxg5 Nd5 44.Bxd5 exd5 45.Qf6 Be8 46.Rxe8 Qh4+ 47.Qxh4+ Kg7 48.Qe7+ Kh6 49.Rh8#.
Feb-10-12
Premium Chessgames Member
  James D Flynn: Following my last post 41.Rh8+ Kg7 42.Qd2 Kxh8(why now?) 43.Qxh6+ Kg8 44.Ng5 Be8 45.Nh7 Kf8 46,Nxe6# if g5 43.Rxh6 Kxh6 44.Qxg5+ Kh7 45.Qh5+ Kg7 46.Ng5 Be8 47.Qh7+ Kf8 48.Nxe6#

All very fanciful but why not 41.Qd2 threatening Rh8+? to stop the Black can play Be8 42.Qd6 Nd5 43.Qf8 and the B on d8 falls and the Black Q must take on d8 to avoid mate. If 41,Qd2 Ne4 42.Qf4 aand the White Q infiltrates on f7 or f8.

Feb-10-12  doubledrooks: I went for 41. Rh8+, dismissing 41. Qd2 much too quickly.
Feb-10-12
Premium Chessgames Member
  Patriot: Black is up a pawn.

My senses tell me 41.Rh8+ is the way. 41...Kxh8 42.Qxg6 and h6 and e6 are hanging, with the knight ready to take action as well on g5. The bishop may also get in on the action with Bh3-e6.

One line may go, 42...Be8 43.Qxh6+ Kg8 44.Ng5.

This is all I'm doing for now.

Feb-10-12
Premium Chessgames Member
  Jimfromprovidence: I liked <abuzic>'s 41 Qd2 Qd1?! line.


click for larger view

A good side puzzle is to understand why 42 Ng5+ does not work in this line but as he showed 42 Rh8+ does.

Feb-10-12  ZZpatzer: <chrisowen> What... The...
Frack...
Are...
You...
Trying...
To...
Communicate...???
Feb-10-12  BadKnight: I considered immediate 1.Rh8+ Kxh8 2.Qg6 followed by Qxh6+, Ng5, Qh7+ and so on, and assumed that with the black king completely exposed white should win somehow. as i see it now, apparently it does not work. so no point for me today. Qd2 did not cross my mind. in an OTB game, not knowing that there is a solution, i might have considered Qd2. this puzzle fits in "find the wrong move" pattern.
Feb-10-12  1stboard: After white plays 41 Qd2 , black plays Qb4 (?). I do not understand this move.

What is wrong with black playing 41 Be8.

It seems to me this move does several things

A ) protects the D7 square

B ) protects the g6 pawn.

C ) protects the back rank from the rook sacrafice that happened in the game.

or am I missing something ??

Feb-10-12  newton296: 41) Rh8+ is the answer!

I can win this line.

Feb-10-12
Premium Chessgames Member
  Patriot: <1stboard> <After white plays 41 Qd2 , black plays Qb4 (?). I do not understand this move. What is wrong with black playing 41 Be8.> After 41.Qd2 Qb4, he may have been trying to stop 42.Qd6. So 41.Qd2 Be8 42.Qd6 Nd5 43.Qf8 looks winning, for example.
Feb-10-12
Premium Chessgames Member
  agb2002: White is a pawn down.

Black threatens 41... Qxc2.

All black pieces are placed on the queenside. This suggests 41.Rh8+, to start an attack against the black castle. However, after 41... Kxh8 42.Qxg6 Bc4 43.Qxh6+ Kg8 44.Ng5 (44.Qg6+ Kf8 45.Ng5 Ke7 and the king escapes) 44... Qd7 45.Qg6+ Qg7 (45... Kf8 46.Nh7+ Ke7 47.Qf6+ Ke8 48.Qf8#) 46.Qe8+ Qf8 47.Qg6+ White only achieves perpetual.

Feb-10-12
Premium Chessgames Member
  agb2002: I saw 41.Qd2 but found 41.Rh8+ more interesting. Better luck tomorrow.
Feb-10-12  BadKnight: <Jimfromprovidence>41.Qd2 Qd1 simply drops a piece to 42.Qxd1 Nxd1 43.Rxd1. or am i missing something?
Feb-10-12
Premium Chessgames Member
  Patriot: <BadKnight> You're not missing anything. The simplification you showed proves it's bad for black.
Feb-10-12
Premium Chessgames Member
  Jimfromprovidence: <BadKnight> <41.Qd2 Qd1 simply drops a piece to 42.Qxd1 Nxd1 43.Rxd1. or am i missing something?>

That's certainly true but it's not what I was getting at.

What I was trying to say was that 42 Rh8+ is the superior move after 41 Qd2 Qd1 and that 42 Ng5+ does not work at all.

The reason 42 Ng5+ does not work is because of black's g pawn. So, if 42...hxg5 43 Qxg5, black has 43...Qh5+! and black now is winning.


click for larger view

White wanted to play 44 Qe7+ but 43...Qh5+ stops that plan.

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