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Sergey Dolmatov vs Leonid Alexandrovich Shamkovich
IBM-B (1979), Amsterdam NED, rd 3, Jul-14
Caro-Kann Defense: Panov Attack (B14)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 3 ·  Later Kibitzing>
Aug-13-09
Premium Chessgames Member
  Once: <mike1> In your line, I don't think that black can play 48...Kxf6. The white king on e5 protects the f6 pawn. Here's the position after 48. gf+


click for larger view

Aug-13-09  zooter: I took a lot of time finding this out and am not even sure this is correct

45.Nxd5 Nxd5 46.Ke4 and

a) If Knight moves back to say b6, 47.Rxf7+ Kh8 (47...Kg8 leads to a windmill) 48.Rxf8+ with a winning endgame

Else white just takes the knight and invades with his king...

time to check

Aug-13-09  A Karpov Fan: yeah I got this quite quickly, only becasue there isn't really anything else going on in the position tho
Aug-13-09  David2009: Thursday's puzzle Dolmatov vs Shamkovich, 1979 45? Medium

45 Nxd5 wins at least a Pawn since after 45...Nxd4 46 Ke4 and the N has no useful retreat. Or 45...Rxd5 46 Rxb6 Ra5 47 Bc4 and the a6 pawn drops. Check:
====
Ok

Aug-13-09  outplayer: <Once> I like your post. You have got the essence of this puzzle.
Aug-13-09
Premium Chessgames Member
  johnlspouge: Thursday (Medium):

Dolmatov vs Shamkovich, 1979 (45.?)

White to play and win.

Material: B for N. The Black Kg7 has 3 legal moves. The White Ba2 x-rays Pf7 through the Black Pd5. The White Rb7 attacks Pf7. The Black Kg7 is the sole support of Nf8, and unstable after Rb7xf7+. Removal of Pd5 with 45.Nxd5 is therefore an interesting candidate. The White Kf3 is secured from check.

Candidates (45.): Nxd5

45.Nxd5 Nxd5 [Rxd5 46.Bxd5 Nxd5 47.Ke4 wins the hapless Nd5]

46.Ke4 (threatening 47.Bxd5)

If Black surrenders Nd5 without compensation, he is a P down. Only moves of Nd5 need be considered [46Re6+ 47.Kxd5]; and of those, only squares protected by Rd6 do not surrender Nd5 immediately.

(1) 46Nb6 47.Rxf7+ Kg8 [Kh8 48.Rxf8+ leaves White a P up]

48.Rf6+ (threatening 49.Rxd6+)

48Ne6 [or Re6] [else, drop Re6, leaving White with R+B+2P vs. 2N]

49.Rxe6

White emerges with B+P vs. N in a superior position.

(2) 46Nf6+

47.Ke5 (threatening 48.Kxd6, 48.gxf6+, or 48.Rxf7+ as above)

47Rd5 [Re6 48.Bxe6 Nxe6 49.gxf6+ leaves White with R+P vs. N]

48.Bxd5 (threatening 49.gxf6+ or 49.Rxf7+)

48Nxd5 49.Kxd5

White has R+P for N.

Aug-13-09
Premium Chessgames Member
  johnlspouge: < <TheBish> wrote: [snip] A2) 46...Rb6 47. Bxd5! (this had to be foreseen) >

Very nice! Thanks for foreseeing the hole in my analysis ;>)

Aug-13-09  The Rocket: I know the first moves.. but how am I supposed to know what black responds the next 15 moves! a puzzle at medium level is not supposed to be 15 moves deep.
Aug-13-09  Weadley: If this puzzle is a medium difficulty then I am the worst player in the world.
Aug-13-09
Premium Chessgames Member
  patzer2: For today's puzzle solution, White plays the sham sacrifice 45. Nxd5! which wins decisive material using the pin, discovered check and overloading of pieces tactical themes.

One possibility to illustrate these tactics is the continuation 45. Nxd5! Nxd5 46. Ke4 (overloading and attacking the pinned Knight) 46...Nb5 47. Rxf7+ Kg8 48. Rf6+ (discovered check) 48...Nxa2 49. Rxd6 , when White's lone Rook and two extra pawns easily beat Black's two Knights and a couple of isolated pawns.

Aug-13-09  cyclon: I did not find this (but its not the only one). A good game and difficult solution - EVEN when it looked (quite) logical AFTERWARDS (note this word!!). Along with creativity (particularly in these days), SIMPLE (only seemingly- AFTERWARDS) solutions are often most toughest and hardest to find.
Aug-13-09  LIFE Master AJ: <patzer2> 46...Nb5 is an illegal move. (Did you mean b4?)

Here is my line, generated with Fritz 11, and checked with Rybka.

</= 46...Nb4?; 47.Rxf7+ Kg8; 48.Rf6+ Nxa2; 49.Rxd6 Nb4; 50.d5 a5; 51.Rb6 Kf7; 52.Rb7+ Ke8; 53.Ra7, ( )

Aug-13-09  rinkworks: 48 ? would be a great Sunday puzzle. (Or easier than a Monday puzzle if you know the previous move.)
Aug-13-09  PinnedPiece: I went with Ne4, thinking that pxN, Kxp would give me some positional advantage with threats of recapturing a black knight (or even the black rook!

But it washed out.

Personal Result (typical on Thurs): Fail

.

Aug-13-09
Premium Chessgames Member
  kevin86: Brilliant! White loans a piece to gain total control of the center,and with it the game.
Aug-13-09
Premium Chessgames Member
  Jimfromprovidence: I saw 45 Nxd5 Nxd5 46 Ke4 Nc7 47 Rxc7 Ne6 as black's best attempt to minimize material loss.


click for larger view

Down a pawn, black's f pawn is protected and white's rook is en prise.

Aug-13-09  YouRang: A nice observation that the black knight has nowhere to go after 45.Nxd5 Nxd5 46.Ke4. White thus gets the piece back a pawn better, and with superior king position, it's good enough to win.

But first, you need to make that nice observation about black's knight, which I didn't. :-(

Aug-13-09  BOSTER: Looking at diagram we can see the two weakneses in black position. Pawn f7 ( is pinned) and pawn d5. First couple ideas:1. Advance f5 and moving white king to e5 (does not work because of Nc4. 2. Sacrifice (temporary) the knight.
45.Nxd5 Nxd5
46. Ke4 (attacking f7- X ray Bishop at a2) Nf6+
47.Ke5 Rd8
48. gxf6 and white much better.
Aug-13-09  Marmot PFL: With the powerful Rb7 and the Ba2 the attack on f7 is thematic. This suggests removing pd5, and the tactics are not difficult - Nxd5 Nxd5 Ke4 and a knight move loses material after Rxf7+. For me a bit easier than the usual Thursday, which is where I sometimes run into problems.
Aug-13-09  briiian13: this is not even a Medium puzzle. the first 3 moves are.

this is not even a puzzle. whatevers

Aug-13-09  Marmot PFL: black could also play 45...Rxd5 but after 46 Bxd5 Nxd5 47 Ke4 the knight is lost
Aug-13-09  Chesstalesfan: <PinnedPiece>
45.Ne4, dxe4+ 46.Kxe4 now the black should be protected from attack on f7 46..Ne6 47.Ke5!
46..Rd7 47.Rxb6
46..Nfd7 or Nbd7 47 b4 to prepare the Ke5
Aug-13-09  miguelo: Typically of Dolmatov, small advantages and a nice, short tactic. I already see this position. Its simple, but not very common, the activity of the king!.
Aug-13-09
Premium Chessgames Member
  patzer2: <A.J.> Thanks! I did intend to give 45. Nxd5! Nxd5 46. Ke4, followed by <46...Nb4 47.Rxf7+ Kg8; 48.Rf6+ Nxa2; 49.Rxd6 > as generated by your computer.

I'm currently without benfit of a chess program as I'm in Waco, Texas helping my son-in-law, daughter and two grandsons unpack. My son-in-law just graduated with his Ph.D. from FSU and is now an Associate Professor of communications starting this month at Baylor University. So, I was happy to see my OTB analysis wasn't far from best play.

Aug-13-09  wals: The fol[Event "IBM B-Event (Amsterdam)"]
[Site "Amsterdam NL"]
[Date "1979.??.??"]
[Round "?"]
[White "Sergey Dolmatov"]
[Black "Leonid Shamkovich"]
[Result "1-0"]
[ECO "B14"]
[Annotator "Rybka 3 1-cpu (30m)"]
[PlyCount "117"]

{B14: Caro-Kann: Panov-Botvinnik Attack with 5...e6)

1. e4 c6 2. d4
d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 e6 6. Nf3 Be7 7. cxd5 exd5 8. Bd3 Nc6 9. h3 O-O 10. O-O Be6 11. Re1 Qc8 12. Bg5 h6 13. Bh4 Nh5 14. Bxe7 Nxe7 15. Rc1 Qd8 16. Qd2 Rc8 17. Re5 Nf6 18. Rce1 Nc6 19. R5e2 Qd6 20. Bb1 Rfd8 21. a3 Na5 22. Qd3 Nc4 23. Ne5 b5 24. Ng4 Bxg4 25. hxg4 b4 26. axb4 Qxb4 27. Qf5 Nd6 28. Qf4 Re8 29. Ba2 Rxe2 30. Rxe2 Nc4 (30... Re8 31. Nxd5 Nxd5 ) 31. g5 hxg5 32. Qxg5 Qd6 (32... Qa5 33. Qf5 Rd8 34. Qd3 ) 33. g3 (33. Qf5 Rd8 ) 33... Nb6 (33... Qc6 34. f3 ) 34. Kg2 (34. Qf5 a6 ) 34... Qb4 ♗lack threatens to win material: ♕b4xd4 (34... Nc4 35. Qf5 Rc6 36. Rc2 ) 35. Qf4 (35. Bxd5 doesn't lead to the expected results Nbxd5 36. Nxd5 Qb7 ) (35. Nxd5 $6 Nbxd5 36. Bxd5 Qxd4 ) 35... Rd8 (35... Kf8 36. Bb1 ) 36. g4 Qd6 37. Qxd6 Rxd6 38. g5 White threatens to win material: g5xf6 Nh7 ♗lack threatens to win material: ♘h7xg5 39. Re8+ Nf8 40. f4 (40. Kf3 g6 ) 40... g6 41. Kf3 ( 41. Kg3 Rd7 ) 41... Kg7 42. Re7 (42. Re5 Ne6 43. Nxd5 Nxd4+ 44. Ke4 Nf5 ) 42... a6 Covers b5 (42... Ne6 43. Nb5 Nc8 44. Rb7 ) 43. Ra7 White threatens to win material: ♖a7xa6 (43. Rb7 Ne6 44. Ke3 ) 43... Nc8 (43... Ne6 must definitely be considered) 44. Rb7 Nb6 (44... Ne6 45. Bxd5 Nd8 ) 45. Nxd5 Decoy: d5 Nxd5 (45... Nxd5 46. Ke4 Decoy) (45... Rxd5 46. Rxb6 Deflection (46. Rxb6 Overloading)) 46. Ke4 Nd7 (46... Nc7 47. Rxc7 Ne6 ) 47. Bxd5 f5+ (47... Kf8 48. Bc4 ) 48. gxf6+ Deflection: f6 Kxf6 (48... Rxf6 49. Rxd7+ Deflection (49. Rxd7+ Decoy) ) (48... Kxf6 49. Ra7 Combination) 49. Bc4 g5 (49... a5 ) 50. f5 g4 51. Be6 g3 (51... Rxe6+ is not much help 52. fxe6 Kxe6 53. Kf4 ) 52. Kf3 Nb6 ( 52... Rxd4 doesn't improve anything 53. Rxd7 Ra4 54. b3 ) 53. Rf7+ Kg5 Rg7+ Kh6 55. Rg4 (55. Rg6+ makes it even easier for White Kh5 56. Ke4 Nd7 57. Rxg3 a5 ) 55... Nd5 (55... Kh5 does not improve anything 56. Bf7+ Kh6 57. Ke4 ) 56. Rxg3 Ne7 (56... Nc7 doesn't change the outcome of the game 57. Rg6+ Kh5 58. Ke4 Nxe6 59. Rxe6 ) 57. Ke4 Rb6 (57... Kh5 does not win a prize 58. d5 Rb6 59. Rg7 Rb4+ 60. Kd3 Nxd5 61. Bxd5 ) 58. b3 Rb8 (58... a5 a fruitless try to alter the course of the game 59. d5 Kh5 60. Kd4 Rb4+ 61. Kc5 ) 59. d5 (59. d5 Rf8 60. Rc3 Nxd5 61. Kxd5 Rd8+ 62. Ke5 ) 1-0

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