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Dmitry Kononenko vs Mikhail Lukyanov
Kiev Independence Cup 4th (2004), rd 7, Aug-17
Sicilian Defense: Najdorf Variation (B90)  ·  1-0
ANALYSIS [x]

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Kibitzer's Corner
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Dec-05-14
Premium Chessgames Member
  mike1: yes, well done indeed. Looking back Black should have gone for 34...Rd4 instead of Rh4. It avoids 43. Qe4# and Qc4+ is coming.
Dec-05-14  Dr. Funkenstein: Diagonalley: yes, as black threatens Rxc2, Qc4, and various h rook checks... Therefore the first few moves are forced... I missed Qd6+ leading to mate because I didn't see the bishop sac, instead I went with Gofer's line as I couldn't see any black defense after Qxh4... However I think in a game you'd have to play the first few moves anyway to survive then calculate after Qd8+ when you have options again.
Dec-05-14  Caissas Clown: <al wazir>: Beautiful. I think my 35. Rxg7 wins eventually, but it's messy:..

You may well be right , but I rejected that , based not on analysis - but on fear ! My immediate impression was that Black has three seemingly viable checks and perhaps at least a draw,so I felt that the forcing Bg7 just HAD to be the best move.

I was fine up to move 41 , when I wanted to sac the B not by with Rg1,but instead playing f4 check.

Dec-05-14
Premium Chessgames Member
  patzer2: Got the initial 35. Bxg7+! but couldn't see all the way to the end of the mate-in-nine solution for today's Friday puzzle.

Got as far as 35. Bxg7+ Bxg7 36. Rh6+ Bxh6 37. Qf6+ Bg7 38. Qd8+ Kh7, but didn't see 39. Bf5+! which mates in four more moves.

Instead, I looked for an earlier improvement and went with 35. Bxg7+ Bxg7 36. Rxg7! (diagram below)


click for larger view

The point being the Rook is untouchable due to 36...Kxg7?? 37. Qg6+ Kf8 (37...Kh8 38. Qh6#) 38. Qf7#, and with an extra piece White should be able to escape the Black desperation checks with the Queen and Rook. Fritz 12 evaluates 36. Rxg7! as a clear win (+8.56 @ 22 depth).

Dec-05-14  Cheapo by the Dozen: <Patzer2>,

In your diagrammed position, Black can try 36 ... Qc4+, hoping for the queen fork at d4. Interposing the queen doesn't look good for White, as Black could exchange queens with check and the take the rook at g7.

So White seems to need to run his king to g2/g3. Fortunately, this seems viable, since 37 Ke1 Ra1+ 38 Kf2 Qd4+ leaves Black's rook hanging at a1 to make up for the loss of White's rook at g7.

Dec-05-14  morfishine: White is up a piece and has the move, so he can contemplate "spending some capital"

True after <35.Rxf6> White can win, but only if Black recaptures the rook: 35...gxf6 36.Qxf6+ Kh7 37.Qg6+ Kh8 38.Qg7#

The problem with 35.Rxf6 is 35...Qc4+ and its hard to see how White can escape the checks, much less avoid mate

Therefore, White must force play with checks

35.Bxg7+ Bxg7 36.Rh6+ Bxh6 37.Qf6+ Bg7 38.Qd8+ Kh7 39.Bf5+ Kh6 40.Qxh4 Be5 41.Qg4 and <g6> cannot be defended

*****
Interesting, <gofer> has the same line with 40.Qxh4 (which conveniently covers <c4>) varying from the game continuation of 40.Qxd6+

*****

Dec-05-14  morfishine: Congragulations <Cheapo by the Dozen>, <patzer2> & <gofer> for winning the Rinus Award! Thank you <hms123> for your gracious commentary!

*****

Dec-05-14  CHESSTTCAMPS: White is up a piece and has heavy force bearing down on the black king. But white can't afford to be careless enough to make a non-checking move that allows a dangerous counterattack with 35...Qc4+. Therefore white should follow standard procedure: examine forcing lines first and pursue them to a conclusion.

35.Bxg7+! Bxg7 36.Rh6+!! Bxh6 37.Qf6+ Bg7 (Kh7 38.Qg6+) 38.Qd8+ Kh7 (Bf8 39.Qxf8+ Kh7 40.Qg8+) 39.Bf5+ Kh6 40.Qxd6+ Kg5 41.Rg1+! Kxf5 (Rg4 42.Rxg4+) 42.Qe6+ Kf4 43.Qe4#

Dec-05-14  wooden nickel: This is the English Attack
Game Collection: Najdorf, English Attack Nbd7 is much more common than Nc6, 6.f3 avoids the line 6.Be3 Ng4 but could lead to 6. ... Qb6 or 6. ... e6 (Scheveningen structure) as opposed to the more common e5 structure. These typical attacks king vs queenside is nothing for weak nerves, nice Friday puzzle!
Dec-05-14
Premium Chessgames Member
  Penguincw: Doesn't seem too hard for a Friday puzzle, although I didn't get the first move. :(
Dec-05-14  VanPoolPlayer: I could see the first few moves but missed Qxd6+ as some others noted. Over the board I would play these moves with my fallback attack to force a stalemate by repetition if things blew up in my face.
Dec-05-14  Castleinthesky: Didn't get it, had the Rxf6,
Dec-05-14  Rookiepawn: <al wazir: I found an improvement in my line: <35. Rxg7 Rxc2+ 36. Rxc2 Rh2+> 37. Ke3. If 37...Qxc2, then 38. Rh7#. If 37...Bxg7, then 38. Bxg7+ Kxg7 39. Qf7+ and mate next.>

I went this way too, but one move after:


click for larger view

Now 36. Rxg7 and after 36 ... Rxc2+ 37. Rxc2 Rh2+ 38. Ke3...

The point seems to be that in e3 the WK is untouchable at least for one move, enough for White to finish the job.

Dec-05-14
Premium Chessgames Member
  patzer2: <Cheapo by the Dozen> After 36. Rxg7! Qc4+, Fritz gives 37. Kf2! Qd4+ 38. Kg3! Qxf7 (38...Kxg7 39. Qg6+ Kf8 40. Qf7#) 39. Kxh4 (+ 12.85 @ 22/48 depth).

The point is no matter how Black wiggles after 36. Rxg7! White remains safe with a piece up and a sure win.

P.S.: Of course if I could have seen it, better was 36. Rh6+! with forced mate-in-seven and no wiggle room for Black.

Dec-05-14
Premium Chessgames Member
  kevin86: A tough one: finessing with the queen was necessary to send the king on a run to mate.
Dec-05-14
Premium Chessgames Member
  Jimfromprovidence: <Morf> <The problem with 35.Rxf6 is 35...Qc4+ and its hard to see how White can escape the checks, much less avoid mate>

It's really not that bad. 35 Rxf6, below, wins clearly in just a few moves.


click for larger view

White has the mate-in-one threat Rf8# and the rook cannot be taken because of of Qxf6+ and mate next move.

Anyway, if 35...Qc4+, after 36 Kf2 Qd4+ 37 Kg3 black is out of luck.


click for larger view

The other main try is 35...Qc4+ 36 Kf2 Rh2+, which is answered by 37 Kg1.


click for larger view

Dec-05-14  abuzic: 23.?
23.Rxg7! Kxg7 24.Qg2+ Kxf7

--<24...♔h8 25.♖g1 ♗f6 26.♕g8+ ♖xg8 27.♖xg8#>;

--<24...♔f6 25.♗e6 followed by ♕g5#>;

--<24...♗g5 25.♕xg5+ ♔xf7
--------<(25...Kf8 26.Qg8+ Ke7 27.Bg5#)>;

--------<(25...Kh8 26.Qf6#)>

--------26.♗e6+ ♔f8 or ...♔e8 27.♕g8+ ♔e7 28.♗g5#>

25.Be6+ Ke8
--<25...Kf8 26.Qg8#>;

--<25...Kf6 26.Qg5#>

26.Qg8+ Bf8 27.Rg1


click for larger view

and black must find a defence against white's Q sac forcing mate: 28.Qxf8+ Kxf8 29.Rg8+ Ke7 30.Bg5#, or he can try just to delay # loosing everything.

Oh!! sorry... POTD rolled to 35.?

Dec-05-14  WJW147: White is also under attack. 35.Bxg7+ appears to be the better move. What follows after that is as beautiful as it is inevitable.
Dec-05-14
Premium Chessgames Member
  chrisowen: Addendum in sight advanced adder and ladder v is having mishap g7 over now time and bend mend bind a mind again ogle send shepherd queen under f6 tend after flock and another thing e6 daddy bug wrapped in up erm a king h6 at sadder by the way in light hunt g5 and alf f4 a win badder g7 as king man h8 a run gladder fend off lanced again band stand finale add in aided and: abetted d8 saddled up hoofed headed over g5 heeded the word hanged high hinge around hamper kick away hastle hacker a hinter hog tied f5 up dupe flubb again heffas a lump hooter and hunter king hugger true delight happen to be healer rook comes g6 over nash in teeth h6 as principle thorax a cut i erm ive to king curry favour a g7 as catch up h8 a king out leggy off he goes hoof effect huffle an shuffle go castle hedgehog rich efface ive much effort to mate bow cot:

diffuse in fell f5 about if any glass ceiling h8 chuffing nora chaff lare f5 hi fifth far have saint e6 down f5 for hoof if rash creak f6 decision off lights 36.Bxh6 37.Qf6+ had hand a dish forges the path a nosh hinch a lift in cage do the math a hop in flight namely g7 cover batch im like glorify oh door as put in verge h6 a king h7 after 8d an won for linch h6 fluffs a pin treacle h8 ave in sight f6 as tender spot windmill why at effort around free forge fasten up in f6 black at sixes and sevens port of call a filer f6 dug ash g7 if the shoe fits in good game a culpa f6 too save at offload carousel roundabout wins f5 at suffer tile grounded queen d6 as:

nest in line a rich arm plum picks e6 all because achtung bishop saint f6 ignored in c3 chosen instead an bed e4 in seals a win strikes 37...Bg7 38.Qd8+ mate in five tailing off.

Dec-05-14  gars: Way out of my league! ...
Dec-05-14  TheaN: Friday 5 December 2014 <35.?>

For a Friday a classical king hunt might be a bit too easy, but positions like this do go from initiative to initiative. If white doesn't grab it now, big chance is that black will take over.

White is up a piece, but black is threatening havoc with 35....Qc4+ 36.Qd3 Rh2+. In these kind of positions, giving initiative is rarely a good idea unless you are perfectly sure the opponent cannot launch a devastating attack of his own. Black missed it: white has complete control over the light squares due to the opposite colored bishops.

The white combination is completely forced. After <35.Bxg7+ Bxg7 (Kh7 36.Rg5#) 36.Rh6+!> clearing for the queen and deflecting the only defending piece. <36....Bxh6 37.Qf6+ Bg7 (Kh7 38.Qg6+ Kh8 39.Qg8#) 38.Qd8+ Kh7 (Bf8 39.Qxf8+ Kh7 40.Qg8+ Kh6 41.Qg6#) 39.Bf5+> white has accomplished that the black bishop can no longer defend against the kinghunt over the light squares. After <39....Kh6 40.Qxd6+ Kg5 (Kxh5 Qg6#; Bf6 41.Qxf6+ Kxh5 42.Qg6#) 41.Rg1+ Rg4 42.Rxg4+ Kxf5 43.Qe6+ Kf4 44.Qe4# 1-0> white seals the deal with only the queen and a rook.

The lesson of this combination is that opposite bishops are incredible in offense; white sacrifices his dark squared bishop and a rook for a winning combination over the light squares.

Dec-05-14  TheaN: It does seem white has enough defenses if he doesn't fire the mating combination but it would still be the safest option. My line has an illegal move but the idea stays the same: move 43 is mate because black can't move to f4.

Interesting fact, 41.f4+ mates as well because it opens up the f-file, but it does so four moves later at the latest <41.f4+ Kxf5 42.Qe6+ Kxf4 43.Rf1+ Kg3 44.Qe3+ Kg4 45.Qf3+ Kg5 46.Qf5+ Kh6 47.Qg6#>.

Dec-05-14  laskereshevsky: I've seen 35. 36.Bxg7+ Bxg7 36.Rh6+ Bxh6 37.Qf6+ Bg7 38.Qd8+ Kh7 39.Bf5+ Kh6 40. Qxd6 Kg5 and here I stopped, thinking: "there must be same mate samewhere.."
Dec-05-14  morfishine: <Jimfromprovidence> Excellent point about 35.Rxf6

I've been putting extra effort into finding the best defense since I generally have been finding the best attacking continuation. In this case, I over-thought myself, and "backed into" the game continuation, only to miss the final moves, but arriving at a winning path anyways :)

Thanks for looking, your posts are always a pleasure to read. Here, I commented on your post from yesterday: Blau vs J H Donner, 1958

*****

Dec-05-14  TheBish: D Kononenko vs M Lukyanov, 2004

White to play (35.?) "Difficult"

White is up a piece, and at first glance looks to have a number of ways to win, such as 35. Rxf6 or even 35. Rxg7, until you notice how exposed White's own king is. White must look out for an upcoming ...Qc4+, ...Rh2+ or ...Rxc2+. The best solution would be one that is forced, i.e. a sequence of checks, if possible. Fortunately for White, such a line exists!

35. Bxg7+! Bxg7

Forced; if 35...Kh7 36. Rg5#.

36. Rh6+! Kxh6 37. Qf6+ Bg7

Obviously forced, since if 37...Kh7 38. Qg6+ Kh8 39. Qg8#.

38. Qd8+ Kh7 39. Bf5+ Kh6

At this point I was originally planning 40. Qxh4, threatening 41. Qf4#, with White's queen conveniently stopping 40...Qc4+ and the bishop stopping 40...Rxc2+. This should win, but then I noticed another check that I missed before. So I looked into it and noticed that it leads to mate! So even if taking the rook leads to a shorter mate, why risk it if you can calculate a forced mate without any garbage spite checks -- or a miracle defense you may have missed?

40. Qxd6+! Kg5 41. Rg1+ Kxf5

No better is 41...Rg4 42. Rxg4+ Kxf5 43. Qe6#.

42. Qe6+ Kf4 43. Qe4#.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Bingo!

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