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Bassem Amin vs Denes Boros
World Junior Championship (2008), Gaziantep, rd 9, Aug-11
Formation: King's Indian Attack (A07)  ·  0-1

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
May-27-11  sevenseaman: After seeing <Patzer2>'s analysis I located the warp in mine. It comes in at 47. Qxg6. It needs to be 47. Bd5+ instead and chips fall into place.
May-27-11
Premium Chessgames Member
  Domdaniel: Oddly enough, I opted for 43.Rxg6 as a 'likely puzzle solution' without seeing a clear win. In a game I'd probably have played 43.Qg5, just to keep the pressure on. And *maybe* seen the win next move.
May-27-11
Premium Chessgames Member
  Once: <Domdaniel> Yes, I know what you mean. 43. Qg5 is more of a real world move than a puzzle solution. Puzzles usually put us into a position where the killer blow is about to strike. We don't often get puzzles where the solution is a building move, like bringing up an extra attacker.

We have said it before, but I think it bears repeating. One of the strengths of this site is that the puzzles are from real games. And the CG.com staff generally do a very good job in picking interesting and varied positions for us to look at.

May-27-11  sevenseaman: Thanks <Domadaniel> for explaining. I saw my error a fraction earlier from <Patzer2>'s analysis but nice of you. The B check before taking the Black Q makes it a new ball game altogether.

These puzzles, since they are based on actual games, are pricelessly instructive.

I cannot tell you how much I enjoyed today's puzzle.

May-27-11
Premium Chessgames Member
  Domdaniel: <Once> For your SW-inflected commentary on POTD, may I award you an honorary degree in TEFL (Teaching Ewok as a Foreign Language).
May-27-11  LIFE Master AJ: Amin,Bassem (2561) - Boros,Denes (2472) [A04]
Wch U20 Gaziantep (9), 11.08.2008
[A.J.G.]

POTD, Friday, May 27th, 2011.

White meets a Sicilian with a "King's Indian Attack" (type) of formation.

1.e4 c5 2.Nf3 Nc6 3.d3 g6 4.g3 Bg7 5.Bg2 e5 6.0-0 Nge7 7.c3 0-0 8.a3 a5 9.a4 d6 10.Na3 h6 11.Nd2 Be6 12.f4 d5 13.Nb5 Kh7 14.Qe2 exf4 15.gxf4 Qd7 16.Nf3 Bg4 17.Be3 b6;


click for larger view

After a rather lackluster opening by White, Black already stands at least equal.

White's next move walks into a pin, maybe Qc2 was better.

18.Rad1 Na7; This is OK, ...d4; was also to be considered.

19.c4!? d4 20.Bc1 Nac6 21.Qf2 Na7 22.Qh4 Nxb5 23.axb5 f5!? 24.e5 Rae8 25.Rde1 Bxf3?!; Maybe ...Bh5 or ...Qc8 instead.

26.Bxf3 Qe6 27.Kh1 Rd8 28.Rg1 Rg8 29.Re2 Rd7 30.Reg2 Bh8 31.Bd2 Rc7 32.Be1 Bg7 33.Qh3 Rd7 34.Bh4 Bf8 35.Rg3 Nc8 36.Bf6 Ne7?! 37.Qh4, This was OK ...

[Better was: >/= 37.Be4!, and White probably has a winning attack. ]

37...Qf7 38.Rh3 Bg7 39.Rgg3 Qf8 40.Kg1 Rh8 41.Kf2 Bxf6?; For the last few moves, White was clearly better, however there seemed to be no obvious breakthrough ... (now) this was probably the losing move.

42.exf6 Ng8;


click for larger view

Black has fallen prey to the typical KIA strategy ... (White's persistent attack has broken through.).

43.Bc6?, ('??')
Throwing away a won game.

[>/= 43.Qg5! Qxf6▢; Black had no choice. (Not 43...Rf7?? 44.Qxg6#) 44.Rxh6+! Nxh6 ; 45.Qxf6, ]

This final part has the look and feel of a time scramble ... (White plays several inaccurate moves.)
43...Rf7 44.Be8!? Rxf6 45.Bc6 Rd6 46.Rg1 Qf6 47.Qg3 Ne7 48.Bf3 Re6 49.Be2?! Re3 50.Qg2 Qe6 51.Ke1 Re8 52.Kd1 Rxh3 53.Qxh3 Nd5 0-1

May-27-11  Nut: Am I the only one who chose 43. Bh5?
May-27-11
Premium Chessgames Member
  kevin86: This one was too tough for me,as it was the player...
May-27-11  CHESSTTCAMPS: White has the material advantage of a minor exchange and the much larger advantage of an active force of majors aimed entirely at the castled black king. Black has all major pieces devoted to defending the king passively, a circumstance that seldom works out favorably at the master level. Oddly enough, when I first looked at the position for a few minutes, I quickly thought that the solution might involve an edge mate, but I got sidetracked with the concern of losing the f6-pawn and started looking at 43.Rxg6. Returning to the position later, I saw how the idea of an attack on g6 fit together with the original idea:

43.Qg5! overloads and overwhelms black's low-mobility force. There is no defense:

A) 43... Qf7 44.Rxh6+! Nxh6 45.Qxh6+! Kg8 (Kxh6 46.Rh3#) 46.Rxg6+ Qxg6 47.Qxg6+ Kf8 48.Bd5 followed by f7 wins.

B) 43... Qxf6 44.Rxh6+ Kg7 (44... Nxh6 45.Qxf6 wins) 45.Rxg6+ wins.

C) 43... Rg7 (43... Ne7 44.fxe7) 44.fxg7 wins (for completeness).

D) 43... other 44.Qxg6#

Easy for a Friday, but very pretty. A gracious player of the black pieces probably goes into line A and resigns after move 45.

May-27-11  CHESSTTCAMPS: Ouch! A missed opportunity for a talented young player.
May-27-11  CHESSTTCAMPS: Ouch #2 - I failed to consider the defense 43... Qe8 covered well by <agb2002>.
May-27-11
Premium Chessgames Member
  patzer2: <<Once> Thanks for the amusing star wars story analogy. I'm a star wars fan, but never though much about the inconsistency of Yoda's wisdom between episodes or the impracticality of not having toilet facilities in an X-wing fighter.

Thought you might be interested in http://www.afterburnerclub.com/eds-..., which answers the question <On long cross-country or even cross-continental trips, how does a fighter pilot go to the bathroom?>

Without repeating too much detail about the answer, if the X-Wing was equipped as most fighter jets are for long distance flights, after arriving at their destination R2 would have been changing out Luke's diaper (i.e. piddle pack) before hosing down the cockpit.

May-27-11
Premium Chessgames Member
  Once: Or perhaps Luke would use the faucet?
May-27-11  Ghuzultyy: Gaziantep? Wow. Turkey again. Thanks cg :)

<43.Qg5!!>
Used to threaten mate from one square, now its two. It is the first move that comes to mind.


click for larger view

There is no escape. To see the threats lets see some lines;

43...Ne7 44.Rxh6+ Qxh6 45.Qxh6 Rh3#
(44...Kg8 45.Bd5+ Nxd5 46.Qxg6+
(45...Rxd5 46.Rxh8+ Kxh8 47.fxe7 Qf7 48.Qh6+ Kg8 49.Rxg6+))

May-27-11
Premium Chessgames Member
  doubledrooks: White's major pieces are menacing the black king, which leads to the possibility of a forcing attack.

Therefore, 43. Qg5 and now:

a. 43...Qf7 44. Rxh6+ Nxh6 45. Qxh6+
a.1 45...Kxh6 46. Rh3#
a.2 45. Kg8 46. Rxg6+ Qxg6 47. Qxg6+

b. 43...Qe8 44. Rxh6+ Nxh6 45. Qxh6+
Kg8 46. Rxg6+ Kf7 47. Rg7+ Ke6 48. f7+ Rxh6 49. fxe8=Q+ Kf6 50. Qf8+ Ke6 51. Bd5+ Rxd5 52. Qe7#

c. 43...Qxf6 44. Rxh6+ Nxh6 45. Qxf6

May-27-11  shajind: chess genius mobile solve today,s problem. 43.Qg5 Q*f6 44.R*h+ N*R 45.Q*Q etc
May-27-11  jheiner: Missed it today. Just too many candidates to consider, particularly spent time on Rxg6 and Bh5 and missed the obvious Qg5. I called time and checked.

I feel like some consolation in that I DID see the mating pattern on the h-file though, if White could deflect one of the h6 defenders, which is why I really wanted Bh5 to work.

Getting closer to seeing M-F in a reasonable amount of time. Looking forward to the kibitzing today.

<Once: "When nine hundred years you reach, remember where you left your verbs, you will not."> I think I split a rib laughing.

May-27-11  LIFE Master AJ: [Better was: 43.Qg5! Qxf6T; (Forced.)

Black had no choice. (43...h6-h5??;
and mate with the Queen on g6.)
.
a) <43...Rf7?? 44.Qxg6#; b) <43...Qe8? ; 44.Rxh6+ Nxh6 ; 45.Qxh6+ Kg8 ;
(Or <45...Kxh6?! ; 46.Rh3#) .
46.Bd5+! , " " and mates. ; c) <43...Rg7? 44.Rxh6+ Nxh6 ; 45.Qxh6+ Kg8T ; Forced.
(<45...Kxh6?! ; 46.Rh3#) .
46.Bd5+ Rf7 ; 47.Rxg6+ Qg7 ;
48.Qxg7#; d) <43...Qf7?! 44.Rxh6+ Nxh6 ;
45.Qxh6+ Kg8 ; 46.Rxg6+ Qxg6 ;
47.Bd5+ Rxd5 ; 48.Qxg6+ Kf8 ;
49.Qg7+ Ke8 ; 50.Qe7#; e) <43...Ne7!? 44.Rxh6+ Kg8 ; Pretty much forced.
(44...Qxh6 ;


click for larger view

45.Qxh6+ Kg8 ;
(Or 45...Kxh6 ; 46.Rh3# . ) .
46.Qg7# ) .
45.Bd5+! Rxd5 ;
(45...Nxd5 ; 46.Qxg6+! Rg7 ;
47.Qxg7+ Qxg7 ; 48.Rxg7+ Kf8 ;
49.Rxh8#) .
46.Rxh8+ Kxh8 ; 47.fxe7 Qf7 ;
48.Qh6+ Kg8 ; 49.Rxg6+ Qxg6 ;
50.Qxg6+ Kh8 ; 51.e8R#;

44.Rxh6+! Nxh6 ; 45.Qxf6, ]

May-27-11  BOSTER: <Domdaniel>. <I opted for 43.Rxg6 as a "likely puzzle solution" without seeing clear win>. Couple lines.
43.Rxg6 Kxg6
44.Bh5+ Kh7
45.Qg3 Ne7
46.fxe7 Qg7
47.Qxg7+ Kxg7

48.e8=Q Rxe8
49.Bxe8
or 43.Rxg6 Rf7
44.Bd5 Rxf6
45.Bxg8+ Rxg8 if Kxg6 Qg3#

May-27-11  avidfan: I admire this position leading to mate from <patzer2>'s previous analysis after 47...Qf7 then 48.Qg7# as the Black queen is pinned while the White pawn is supporting the mate at g7.


click for larger view

May-27-11  hedgeh0g: 43.Qg5! is a killer. Black appears to be forced to play 43...Ne7, since ...Qe8 (or Qf7) is answered by Rxh6+! Nxh6 Qxh6+ Kxh6 Rh3#. A picturesque checkmate on a cramped black king.
May-27-11  WhiteRook48: 43 Qg5 - wow, even I got it.
must have lowered the difficulty for this puzzle
May-27-11  Patriot: This took me a long time to see 43.Qg5 and miscalculated after that following 43...Qxf6 44.Rxh6+. Amazingly I didn't see 44...Kg7 45.Rxg6+ winning immediately. 45.Rxh8? Kxh8, not 45...Qxg5? 46.Rxg8+ Kxg8 47.Rxg5. I took a nap shortly after this!

<BOSTER> What happens after 45...Qxf6? That seems much stronger.

May-27-11  toso51: My choice was 43.Bh5, I think that it will go give more possible.

I did not like 43.Bc6.

May-28-11  rilkefan: <<sevenseaman>:I located the warp in mine. It comes in at 47. Qxg6.>

<43. Qg5 Qf7 44 Rxh6+ Nxh6 45. Qxh6+ Kg8 46. Rxg6+ Qxg6 47. Qxg6 Kf8 48. Bd5>

I expected 48.Bc6, forking as it were either e8 or g7, depending on what the rook does (or ...Rg8 49.Qxg8+).

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