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Later Kibitzing> |
Nov-24-12
 | | offramp: Greetings from planet Perl. |
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| Nov-24-12 | | VincitQuiSeVincit: I just realized that 50. Qg8+ followed by 51. Rg3 loses to 51. ... Qe2+ followed by 52. ... Qe1+ and then 53. ... Bg1+, 54. ... Bf2+ etc |
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| Nov-24-12 | | gofer: There must be some way to use the rook sac on g2 followed by the Knight fork on f4, but the obvious one fails... 48 ... Rxg2+
49 Qxg2 Nxf4
50 Qg8+ Kxh6
51 Qg6#
So we need to find another...
<48 ... Qxd3!>
49 Qxe6 Qg3+
50 Kg1/Kh1 Qxg2#
<49 Qxd3 Rxg2+!>
50 Kxg2 Nxf4+ 
50 Kh3 Nxf4+
51 Kh4 Bf6#
<50 Kh1 ...>
Okay now what? Black wants to win Nh6, but not at the expense of one of its own pieces. The next two move seems to tick all the boxes! <50 ... Be3!>
51 Kxg2 Nxf4+
52 Kf3 Nxd3
53 Kxe3 Nxc5
54 Nf7 Kg2
<51 Nf7 Rd2!>
The white queen is attacked, but more amazingly white pawns are conspiring against the queen and she cannot stay on a square that still attacks Be3! So suddenly, the White king is in a mating net and the white queen only has a few choices; Qf1, Qb5 and Qa6. The latter two seem to take the queen away from the action... <52 Qf1 Nxf4>
Okay, I think I should quit while I am ahead. I am quite a long way beyond my normal try and there too many options to really know I am on the right path! ~~~
Doh! I started with a mis-calculation.
48 ... Rxg2+
49 Qxg2 Nxf4
50 Qg8+ Kxh6
51 Qg6# ???
51 Qg6+ Nxg6!
Which is a shame! |
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| Nov-24-12 | | goodevans: <gofer> I too went for the <48...Qxd3> Q-sac but I now believe it leads to no more than rough equality (or indeed a forced draw after 48...Qxd3 49.Qxd3 Rxg2+ 50.Kh1 Rg1+). In the line you gave, white can play <52.Ng5+> before moving his Q. Now black must decide what to do with his K. If he plays <52...Kg8> then the white h-pawn becomes a significant threat. If instead he tries to eliminate this with <52...Kh6 53.Nf7+ Kxh5> then this leads to additional exposure of his K and now the white c-pawn becomes the threat (e.g. 54.Qf1 Nxf4 55.c6 Rc2? 56.Qd1+). |
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| Nov-24-12 | | 1stboard: Does white have the beginnings of a perpetual check with whites move 50 Qg8 ( instead of playing Qg3 ) ??? |
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| Nov-24-12 | | Abdel Irada: <1stboard>: Refer to my solution post for the continuation after 50. Qg8†. |
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Nov-24-12
 | | Sneaky: I stumbled on the idea of 50.Qg8+(!) Kxh6 51.Rg3(!)
[Sidenote: when one puts an exclam in parentheses like that, it means "the best move under dire circumstances."] I didn't see any way around it: Black sure must be toast. (So I thought, see VincitQuiSeVincit and others for the refutation.) Then I had a second hallucination, that I solved the puzzle! At that point my head was spinning so much I entirely forgot that it was *Black* to play and win. |
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| Nov-24-12 | | Bengambit: Very good,48...Rxg2 because the Rook on g8 was attacked by the knight on h6 anyway, but I like the finish with,52...Qe2 53. Kh1 Bd5 and the f1,f2,g1,g2,h1,h2 squares are all covered by black's Queen and Bishop. |
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| Nov-24-12 | | nalinw: 50. Qg8+ Kxh6 51. Rg3 loses quickly to
52. .. Qe2+ 53. Kh1 Qxh5+ 54. Rh3 Qxh3# |
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| Nov-24-12 | | cyclon: In today's puzzle I'd go for 48. -Rxg2+ ( 48. -Kxh6 49. Qxe6+ Kh7 50. Qxf7 Kh8 51. Rxd4 ) 49. Qxg2 Nxf4 50. Qg3 ( 50. Qg8+ Kxh6 51. Qf8+ Bg7 / 50. Qf3 Nxd3 ) -Qxd3 and this seems like a winning game for Black f.e.; 51. Qxf4 Qe2+ 52. Kh1/Kh3 Be5 and either it's a mate on h2, or Nh6 falls. So, cufflinks for "casi" after 48. -Rxg2+ and 49. -Nxf4 ( NOT 49. -Qxd3?? 50. Qg8+ Kxh6 51. Qg6X ) ! |
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Nov-24-12
 | | scormus: Fools rush in ...
I smelled a rat about <48 .... Qxd3> and saw it doesn't quite make it <49 Qxd3 Rxg2 50 Kh1 Rg1+ 51 Kh2 Rg2+ 1/2-1/2> So it had to be <48 .... Rxg2> first so W cannot decline the R. Oh, but then he plays <49 Qxg2> and it goes <Nxf4 50 Qg8+ Kxh6 51 Rxd4> W is OK, Isn't he? Ah no, just seen it
<51 ... Qe2+ 52 Kh1 Qxh5+ 53 Kg1 Ne7+ 0-1> B must have seen all that when he played <48 ... Rxg2!> |
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| Nov-24-12 | | Marmot PFL: This took a while because I had Java problems and had to reinstall everything. Compared to that the position was fairly easy - 48...Rxg2+ (to divert the queen away from the rook, as Kxg2+ loses instantly) 49 Qxg2 Nxf4 50 Qg8+ Kxh6 51 Rxd4 Qe2+ 52 Kh1 (Kg3 loses the queen) Qf1+ 53 Kh2 Qf2+ and Qxd4. |
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| Nov-24-12 | | James D Flynn: White is a pawn up and threatens to take the R on g8 next move with either K or N. Black can sac the exchange with 48…..R xg2+ and if 49.KxR Nxf4+ wins the Q on e2 and if 49.Qxg2 Qxd3 wins the R but loses the game to 50.Qg6+ Kh8 51.Qg8#. What about changing the move order with 48….Qxd3 49.Qxd3 Rxg2+? Now taking loses the Q to Nxf4+ and Black is a piece up, but the White K has the square h1 and does not need to take. What then? Black has a draw by repetition with 50.Kh1 Rg1+ 51.Kh2 Rg2+ 52.Kh1(not Kh3 Nf4+ wins the Q). Could this be a spoiler? After 48…..Qxd3 49.Qxd3 Rxg2+ 50.Kh1 white has sacrificed Q for R and N and the N on h6 is en prise but the Black B on d4 is also en prise, if Black could create a threat with that B and take the N on h6 he would have material superiority. Could there be a win by 51….. Be3 52.Nf7 Rg3 with the threat 53….Rh3+ 54.Kg2 Nxf4+ 55.Kf1 Rh1# ? No 53.Ng5+ spoils that so I conclude thus is indeed a spoiler and Black must take the repetition. |
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| Nov-24-12 | | morfishine: White is up a pawn, but he has a poor position with a pinned rook and a hanging Knight.
And there's more bad news: Its Black to move
Whats evident is Black's pressure against <d3> & <g2>. A subsequent <Nxf4>
(which also conveniently covers e6) hits both of these squares. With the basic
combination evolving, we have reduced this puzzle to one of move-order. Before we analyze candidates, we can eliminate <48...Kxh6> due to <49.Qxe6+ Kh7
50.Qxf5+ Kh8 51.Rxd4> and now <51...Rxg2+ 52.Kxg2 Qe2+ 53.Kh1 Qf3+ 54.Kh2 Qf2+
55.Kh3 Qxd4> Black is up a piece but down three pawns. This doesn't seem correct. Its useful to know this as this helps steer the Black attack in the right direction. I'm looking at 2 candidates: <48...Qxd3> & <48...Rxg2+> (1) <48...Qxd3> The main line runs <49.Qxd3 Rxg2+ 50.Kxg2 Nxf4+ 51.Kf3 Nxd3> and Black
has won a piece; So, White must ignore the rook and try to keep his Queen on: <50.Kh1> If 50.Kh3 Nxf4+ forks the Queen anyways... <50...Rg1+ 51.Kh2> and now what for Black?
click for larger view
The Black Bishop is hanging and the White King can't be forced to <h3>. A draw by repetition is best here since <51...Bxc5> is answered by <52.Nxf5 gxf5
53.Qxf5+> followed by 54.Qxd5 and now White is winning Well, thats disappointing besides time-consuming. Lets look at <48...Rxg2+> (2) <48...Rxg2+> Removing the defender of <f4> <49.Qxg2> If 49.Kxg2 Nxf4+ forking the White Queen wins for Black <49...Nxf4> Double-attack on the rook, attacks the Queen, and covers the important squares
<e6> & <g6>. A blunder for Black is 49...Qxd3 due to 50.Qg8+ Kxh6 51.Qg6 mate. <50.Qg8+> Either this or resign. I don't see any other reasonable continuation <50...Kxh6 51.Rd2> Prevents 51...Qe2+; If 51.Rxd4 Qe2+ 52.Kg1 or Kg3 is met by 52...Qe3+ followed by 53...Qxe3 and Black is up a piece, though its hard to tell if he is winning or if he can
prevent a perpetual; Also 52.Kh1 Qf3+ and 53.Kg1 or 53.Kh2 results in the same Finally, a mistake for White is 51.Qf8+ Bg7 and both Queen and rook are en prise <51...Qxc5> Looks best
click for larger view
**********
Hmmm, White didn't even bother with 50.Qg8+ |
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| Nov-24-12 | | sushijunkie: I figured both the winning move plus the continuations, but I would have lost on time at any controls. How do I score myself? |
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| Nov-24-12 | | BOSTER: When most white pieces on the light squares are rolling around "f4" square ,which under attack of the black knight d5, it is clear that this <key> cell in this pos. should be overprotected.
The defense by Ng2 is only the illusion.
Can we understand the motive of Naiditsch's actions which created such bizarre spectacle on the chessboard? Because the direct moves order 48...Qxd3 49.Qxd3 Rxg2+ 50. Kh1 doesn't work, let's try another one 48...Rxg2+ 49. Qxg2 Nxf4 50. if Qg8+ Kxh6 51.Rg3 Qe2+ 52.Kh1 Qxh5
if 50. Qg3 Qxd3 51.Qxf4 Qe2+ 52.Kh1(or Kh3) Be5. |
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Nov-24-12
 | | chrisowen: Into xray it is in behaviour path queen infiltrate once in 42.c5 balance tip toward black down graded 46.nf7 lifting rookg8 advantage it swing black favour in good agility 47.qe2? allow cleric fluffed in d4 upper hand prinicipaly it honour in f7 toh6 ko'd for having ogle at rookg8 in take g2 bind grateful 48...Rxg2+ king cant recapture ar good in wall it is right in knight will open royal fork it double in dig go knightxf4 wangle it her e2 in get taken down evermored 49.Qxg2 Nxf4. |
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Nov-24-12
| | chrisowen: Minding in what again it you in think of to win enter in ogle queening 48...Qxd3 49.Qxd3 Rxg2+ king ok dig in take rook again by the knight gain pairing off delve in f4 and og hurt in rich again really it rankling rook queen black emerge in piece ahead, titter in d3 a king hone in not recapturing then dark can give a perp at draw in g1 g2 while go a way to believe queen it is reprimanded in d3. Change did you in it hog tied it seem like for together in get going have it ok in f4 covering g6 nincompoop it is g8+ in kingh6 Rxd4 qe2+ white will regain the rook emerging knight up. |
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Nov-24-12
 | | fm avari viraf: I think, many will agree in toto that to-day's puzzle isn't very difficult. The kenspeckle 48...Rxg2+ destroys White's stubborn defence as 49.Kxg2 is not possible so the only move 49.Qxg2 Nxf4 leaves White in quagmire. |
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| Nov-24-12 | | cyclon: Later I started to think elsewhere the position in my mind and though my solution appeared to be correct, some supplementary lines are required in case of "what if White plays...". After 48. -Rxg2+ 49. Qxg2 Nxf4 , I-F White plays after moves 50. Qg8+ Kxh6; 1. 51. Rd2, then 51. -Qf1 ( threat is 52. -Qh3X ) 52. Qf8+ ( 52. Qg3 Bg1+ / 52 Rxd4 Qf2+ ) 52. -Kxh5 ( 52. -Bg7? here ) and in this slightly far-fetched variation there is an interesting 53. Qf7+ Kg4 54. Qg8+ Kf3 55. Qg3+ Ke4 and this is a kind of zugzwang ( 56. Rxd4+ Kxd4 57. c6 Qe2+ 58. Kh1/Kg1 Qd1+ followed by 59. -Qc2+ and 60. -Nd5 winning the c-pawn ). 2. 51. Rxd4 ( 51. Rg3 Qe2+ mates and 51. Rf3 Qe2+ 52. Kg3 Qg2+ winning the Queen, or else he goes for 52. Kh1 Qxf3+ 53. Kh2 Qh3X ) 51. -Qe2+ 52. Kg1 ( 52. Kh1 Qf1+ transposes, cause if White plays 53. Qg1, then 53. -Qxg1+ 54. Kxg1 Ne2+ wins ) 52. -Qe3+ followed by 53. -Qxd4 should win for Black. |
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| Nov-24-12 | | mlcm: <VincitQuiSeVincit> the problem of that is 51...., Qe2; 52.Rg2, Qxh5+; 53. Kg3, Qh3*; 54. Kxf4, e5 mate, or Qe3 mate.
So, <cyclon>, after 51. Rd2, Qxb3! (with the same threat and winning a pawn!)52. Qf8+ (52. Rxd4, , Bg7 wins easily. And against 51. Rxd4, Qe2+ is really winning for black. |
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| Nov-24-12 | | mlcm: Sorry: 52. Qf8+, Bg7 wins easily |
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| Nov-24-12 | | Jambow: 48...Qxd3 49.Qxd3... Rxg2+ 50. Kxg2... Kxf4+ and white resigns ? About 35 seconds since every dilema has only one obvious solution. Not all that difficult but would have been a blast to play OTB. |
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| Nov-25-12 | | cyclon: < Jambow: 48...Qxd3 49.Qxd3... Rxg2+ 50. Kxg2... Kxf4+ and white resigns ?>
After 49. -Rxg2+ White does NOT have to move your suggestion 50. Kxg2??, but plays 50. Kh1 instead forcing Black to draw by repetition. So, your move 48. -Qxd3? seems at FIRST GLANCE only as a wrong move order, but is basically a wrong idea as a whole if you haven't noticed the consequences. |
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| Nov-27-12 | | Jambow: Oops did I miss it? Ouch yes I did :o( See it now thanks <cyclon> |
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Kibitzing
sac: 48...Rxg2+