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Ilia Abramovich Kan vs Anatolij Bannik
URS ch sf (1952), Riga, rd 6
Queen's Gambit Declined: Tartakower Defense. General (D58)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
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Aug-11-08  Amarande: It's actually a little harder to find than most Mondays, and it took me several minutes (after discovering that Qxf5 doesn't work - in fact, if White persists in trying to win a pawn, Black even wins: 45 Qxf5 exf5 46 Nxd5? (46 Rd1 is necessary, after which it's not clear who has the upper hand) Bxd4! 47 Rg5? Re2! and Black wins - White's Knight can run, but it can't hide from the discovered check, and if 48 Rxf5 Rf2+. But not 47 ... Rf8? which is what I originally considered on this line, where White seems to get the advantage with 48 Ne7 Bf6 49 Nxf5+ etc.)

Probably more a Tuesday or Wednesday if I was going to place it ...

Aug-11-08
Premium Chessgames Member
  YouRang: I don't think I've ever worked so hard on a Monday puzzle, and I must admit that 45.Rg5 is very pretty, and that I didn't find it.

I think I did find a win, although I was quite sure it wasn't the intended solution since it was so involved. Anyway, here is what I ended up with:

45.Rg6+ Kh7 <forced>

46.Qc7 <threatens Qxg7# and guards knight> Rg8 <guard Bg7>

47.h6 <guards rook, freeing my to threaten Nxe6> Kh8 <unpinning his bishop>

48.Nxe6 <threat:Rxg7> Bf8 <saves bishop, while it still guards g7 and h6>

49.Nxf8 <threat:Qh7# and Rh6#> Qxf8

50.Qe5+ <board...vision...fading...> Kh7

51.Rf6 <attacking queen w/ threat of Qf5+> Qg7 <I think the best defense>

52.Qf5+ <the only move I can still see through the fog> Kf8

53.Rf7 <threatening queen -- it is sill on g7, right?>

At this point, I am counting on black to realize that I'm gonna win so he might as well resign... :-p

If this <is> the solution, then today is Friday.

Aug-11-08  Alphastar: Don't worry all you who didn't find it or had many problems finding it, this position is also in CT-Art and if I remember correctly this problem is rated there at level 30 or 40 (which is around 1900-2100). (I also didn't get it the first time I came across the position on CT-Art.)

Also the OTB tournament was quite succesful for me :) I scored 5 wins, 2 draws and 2 losses for a 6/9 overall score and a shared 9th place. I performed 203 points above my current rating (1906) and in the last round I beat a 2300-rated guy.

Aug-11-08  Salaskan: Didn't see it either, I was thinking about 45. Rg6+ Kh7 46. Rxe6 with the black queen being pinned to the mating square g6, forgetting that it can simply take the white queen.

Johnlspouge, doesn't 46.Rh5+ Qxh5 47. Nxh5 Kxh5 48. Qh7+ Kg4 49. Qxg7+ win more easily?

Aug-11-08  chezzy: Yes, Rg5 ... took me several minutes, though. Not too easy for Monday.
Aug-11-08
Premium Chessgames Member
  kevin86: I missed this one! I need to put on the dunce cap.

It was a very subtle puzzle for Monday. It WAS a queen sac,though a passive one.

Aug-11-08
Premium Chessgames Member
  YouRang: FYI - A momentous occasion!

GM Timmerman today resigned in his game vs. chessgames.com World team. :-)

Chessgames Challenge: The World vs G Timmerman, 2007

Aug-11-08
Premium Chessgames Member
  johnlspouge: <<Salaskan> wrote: Johnlspouge, doesn't 46.Rh5+ Qxh5 47. Nxh5 Kxh5 48. Qh7+ Kg4 49. Qxg7+ win more easily?>

It might, and your variation reflects the laudable principle of exchanging material when having material advantage. On the other hand, my variation might permit midgame mates with Q+N+RP vs R+B and the Black K in a box.

Generally, however, I do not seek best play after establishing a clear win, because of limits on my time.

Aug-11-08  Kasputin: 45. Rg5 and white will either come out ahead on material or will mate the black king

For example:

a) 45 ...Qxc2; 46. Rh5#

b) 45 ...Qf7; 46. Rg6+ Kh7; 47. Rf6+ Kg8; 48. Rxf7 Kxf7; 49. Qg6+ Kf8 (other moves and black drops either the rook or bishop to the queen); 50. Nxe6+ and black might as well resign at that point

Moving the black queen anywhere else won't work (away from defence of h6 and the rook will land there with mate - away from defence of g6 and the queen will land there with mate) and the queen will get captured if it stays.

c) 45 ...Rf8; 46. Rxf5 Rxf5; Nxe6

d) 45 ...Qxg5; 46. hxg5+ Kxg5; 47. Qg6+ and black can kiss the rook goodbye.

This all took me longer to find then I would care to admit, but there are some subtleties about this position that aren't necessarily easy to spot off the mark.

Aug-11-08  Kasputin: I can see that others had trouble too. Funny because this week I probably won't have time to check the site again. But today, I thought, oh well, it is Monday, how hard can it be?
Aug-11-08  PinnedPiece: Once again, I have to say I was defeated by a Monday puzzle: My goal is to see the winning move in under 30 seconds (as in blitz, no time on clock, move and win!)

But it took me about a minute and a half.

In that time my flag fell.

Aug-11-08  Illogic: Looking for something that wasn't there, I found 45. Rxg7?? Kxg7 46. Nxe6+?? (since the rook can't take) Kf6 47. Qxf5+ Kxf5 48. Ng7+ and White is a piece up. Of course, after seeing I'm wrong and reviewing it, black just plays 46.. Qxe6 for an easy bust.
Aug-11-08
Premium Chessgames Member
  fm avari viraf: To be candid, it's not that easy to find in few seconds, one needs to concentrate a little more & the answer looks pretty as well as aesthetic 45.Rg5! & the Black defence crumbles, if 45...Qxc2 46.Rh5#. A lovely game with lots of tactics.
Aug-11-08
Premium Chessgames Member
  Once: Another wrinkle. <TheaN> suggests a potential defence for black with: 45. Rg5 Qf7, defending both h5 and g6. I hadn't spotted this when I settled on 45. Rg5.

White does have a stunning reposte, which I think elevates this puzzle way above a typical Monday - 46. Qc7!


click for larger view

It's mate in 3. Black cannot defend against the twin threats of Qxb7 and Rh5. If 46. ... Re7 Qxe7.

BTW - congratulations to all involved in the World vs GMT. A stunning victory.

Aug-11-08
Premium Chessgames Member
  DarthStapler: surprisingly I didn't get it
Aug-11-08
Premium Chessgames Member
  johnlspouge: <<Once> wrote: [snip] White does have a stunning reposte, which I think elevates this puzzle way above a typical Monday - 46. Qc7! [snip] >

Beautiful! Thanks, <Once>.

Aug-11-08
Premium Chessgames Member
  chrisowen: Rg5 earlier would do it although its a bit like cheese rolling, you have to get it downhill and dont eat the grass.
Aug-11-08  drnooo: Dunno if somebody else here has put this down as a little longer alternative solution but it also works: check with the rook at g6, kh7, rook takes bishop check, king cant take otherwise the kt check at e6 and queen takes queen allows the knight fork picking up the rook, and if king refuses then its an easy win with the rook on the seventh and a full knight ahead: and its all forced.
Aug-11-08  drnooo: The virtue of the above line is that its chop chop chop, easy to see
Aug-11-08  TheaN: <johnlspouge: <<Once> wrote: [snip] White does have a stunning reposte, which I think elevates this puzzle way above a typical Monday - 46. Qc7! [snip] >

Beautiful! Thanks, <Once>.>

Ditto. Of course Rh5 (and Rg6 for that matter) win also but this is way more effective. Also, Once, thanks for giving me the credit of the Rh5 line, which Salaskan and John did not do in the first place: no offense though :).

Aug-11-08  TheaN: Some confirmation. Fritz's infinite, still running (depth unknown, but most of it is clear):


click for larger view

Analysis by Fritz 11:

1. (8.04): 1...Qxg5 2.hxg5+ Kxg5 3.Qg6+ Kxf4 4.Qxe8 Bxd4 5.Qxe6 a5 6.Qxd5 Be3 7.Kb3 Bc5 8.Kc4 Be3 9.Qd6+ Kg4 10.Qg6+ Kf4 11.Kd3 Bc5

2. (10.86): 1...Rf8 2.Rxf5 exf5 3.Qg2 Rf6 4.Nxd5 Rf8 5.Ne7 Rf6 6.Ng8+ Kh7 7.Nxf6+ Bxf6 8.Qf3 Kg6 9.Qc6 Kf7 10.h5 f4 11.Kb3 b5 12.Qxb5 f3 13.Kc4 Kf8

3. (#10): 1...Kh7 2.Rxf5 exf5 3.Qxf5+ Kg8 4.Qxd5+ Kh8 5.Qh5+ Bh6 6.Qxh6+ Kg8 7.Qg6+ Kf8 8.Qf6+ Kg8 9.Nh5 Re7 10.Qxe7 b5 11.Qg7#

4. (#10): 1...Be5 2.Rxf5 exf5 3.Qc6+ Kg7 4.dxe5 Rg8 5.Qf6+ Kh7 6.Qxf5+ Kg7 7.e6 Rf8 8.Nh5+ Kh8 9.Qxf8+ Kh7 10.Qg7#

5. (#9): 1...Bxd4 2.Rxf5 exf5 3.Qg2 Kh7 4.Qg6+ Kh8 5.Qxe8+ Kg7 6.Ne6+ Kh7 7.Qh5+ Kg8 8.Qg6+ Kh8 9.Nf8

6. (#8): 1...Bf8 2.Rxf5 exf5 3.Qxf5 Kg7 4.Nh5+ Kh8 5.Qf6+ Kh7 6.Qf7+ Kh8 7.Nf6 Bg7 8.Qxe8+ Bf8 9.Qxf8#

7. (#6): 1...Bf6 2.Rxf5 Kg7 3.Nh5+ Kh8 4.Rxf6 a5 5.Rh6+ Kg8 6.Qg6+ Kf8 7.Qg7#

8. (#5): 1...Qf7 2.Qc7 a6 3.Qxf7

Aug-11-08  TrueBlue: saw several ways white can get advantage, didn't include played move :(
Aug-11-08  zooter: I did not notice the possible 45...Qf7 response, but it really shouldn't take anything away from the puzzle as 46.Rg6+ wins the queen a move later...though off course if white has time, he can put more pressure by 46.Qc7 and force mate
Aug-12-08  tjshann: Not very easy.
Feb-18-13
Premium Chessgames Member
  FSR: Yes We Kan!
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