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Vasily Smyslov vs Laszlo Szabo
Hastings (1954/55), Hastings ENG, rd 4, Jan-01
Neo-Grünfeld Defense: Delayed Exchange Variation (D74)  ·  1-0
ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Jun-14-05  your brilliance: Yeeha! I got it. No way to stop the c pawn without taking it.

Jun-14-05  Nickisimo: <kjartanmi> I've done the whole CT-Art circuit once already(doing the MDLM 7 circles thing), and I think I remember this theme as well(though it could be from other material or games I've studied as well). If I'm not mistaken Ct-Art makes you work through the PxP PxP NxP N+ variation, though that really isn't so hard to see.

I think the Chessgames staff has become irked by our "theme of the week discoveries", and has started to put puzzles in randomly now. Definitely makes things a little harder, although you know the side to move is going to win. One really tricky thing about Ct-Art is that some of the time you make a sac or something only to find out that you're only playing for a draw. I've stared at positions like that for 5 minutes or more only to move my attacking piece back to where it was and find out that repeating the position is the right answer!

Jun-14-05
Premium Chessgames Member
  patzer2: Today's puzzle solution, 35. c6!, could be classified as a combined clearance and double attack move. It clears the c5 square for the winning Knight Fork, but it also threatens a decisive passed pawn if Black tries to avoid the game continuation.

An analysis with Fritz 8, at 16 to 20 depth, illustrates a few key side variations:

<35. c6! exf4+> (35... Bd5 36. f5+ Kxf5 37. c7 ; 35... bxc6 36. Nc5+ Kd6 37. Nxb3 cxb5 38. fxe5+ Kxe5 ) <36. Kxf4 bxc6> (36... Bd5 37. Nc5+ Ke7 38. c7 Ne6+ 39. Nxe6 Bxe6 40. Bxb7 ) <37. Nc5+ Kd6 38. Nxb3 cxb5 39. h4 Nc6 40. Bxc6 Kxc6 41. Kg4 b4 42. axb4 Kb5 43. Nd4+ 1-0>

Had Black not resigned here, play might have continued 43...Kc4 44. Nc6 a6 45. Kh5 Kb5 46. Kxh6 Kxc6 47. h5 f5 48. Kg5 Kb5 (48... f4 49. Kxf4 Kd7 50. h6) 49. h6 f4 50. Kxf4 Kxb4 51. h7 a5 52. h8=Q a4 53. Qd4+ Kb3 54. Ke3 a3 55. Kd3 a2 56. Qc3+ Ka4 57. Kc4 a1=Q 58. Qb4# 1-0

Jun-14-05  trumbull0042: Great puzzle. A refreshing departure from rook sacs.
Jun-14-05  peterk007: Nice puzzle, but which one is the losing move? Isn't instead of 41. ... b4 41. ... Kd5 much stronger? b4 is played with the idea that after a capture black may recapture on b4. But the N threatens a second fork K and pawn a6. Thus it is just a bad idea. When black centralised his king, he can, if the white king walks to the h-file, send his f-pawn running, or bother the white knight and use his pawn majority on the queen side. And the white knight is not that good to stop these. In short, it is not that clear to me.
Jun-14-05  zb2cr: <peterk>,

Hmmm. If 41...Kd5; 42 Kf5. Now if 42...Kc4; 43 Na5+, Kc3 (only way to try to get around the barrier formed by the Knight and Pawn on b4, c4 & b3); 44 Nc6. Now if 44...Kb3, the obvious sequence is 45 Nd4+, Kxa3; 46 Nxb5+. So White can force Black to waste tempoes, which he then uses to win the f-Pawn and the h-Pawn.

Jun-14-05  Marco65: <patzer2> <Had Black not resigned here, play might have continued 43...Kc4 44.Nc6 a6 45.Kh5> or even simpler 45.Nb8 Kxb4 46.Nxa6+ or 45...Kb5 46.Kf5
Jun-14-05  Shokwave: It didn't look like a mating puzzle, so I went into "win a piece" mode, looked for a knight fork, and saw c6 immediately, all in about a second. If it hadn't been a puzzle, it would have taken a lot longer :)
Jun-14-05  MatrixManNe0: <Sneaky>
Great minds think alike!! ;)
Jun-14-05
Premium Chessgames Member
  patzer2: <Peterk007> If <41...Kd5>, then White wins after 42. Kh5 f5 43. Kxh6 f4 44. h5 f3 45. Kg7 f2 46. Nd2 Kd4 47. h6 Kd3 48. Nf1 Ke2 49. Nh2 f1=Q 50. Nxf1 .
Jun-14-05
Premium Chessgames Member
  kevin86: A noncapture at move 35 would have led to 36 c7-winning the knight or queening.
Jun-14-05  peterk007: <patzer2> this race to the 8th rank required some precise calculation. Which you did! Thanks a lot.
Jun-14-05  Marco65: <peterk007><zb2cr> If 41...Kd5 42.Kf5 Kc4 43.Na5+ Kc3 44.Nc6 Kb3 45.Nd4+ of course Black doens't play 45...Kxa3 but 45...Kc4 46.Nc6 Kb3 repeating.

In my opinion 41...Kd5 makes life much harder for White, which must use his tempoes very careful. If my analysis is right White doesn't have the time to attack f7. Probably he should attack h6 and place the knight at d2 to try and control both b and f pawns, e.g.:

41...Kd5 42.Kh5 f5 43.Kxh6 f4 44.Nd2 Kd4 (or 44...a5 45.Kg5 b4 46.axb4 a4 47.Kxf4 a3 48.Nb3 ) 45.Kg5 Ke3 46.h5 and wins

41...Kd5 42.Kh5 Kc4 43.Nd2+ Kc3 44.Nb1+ (it's important that the knight lures the king in the b file, or ...a5 and ...b4 are too fast) Kb2 45.Kxh6 Kxb1 46.Kg5 Ka2 47.h5 Kxa3 48.h6 b4 49.h7 b3 50.h8=Q b2 White can win easily the endgame

Jun-14-05  halcyonteam: c5 !!
Jun-14-05  notyetagm: A very nice <double attack>, 36 c6!. This pawn move vacates the c6-square (<clearance>) for the <knight fork> 37 ♘c5+ and 38 ♘xb3, winning a whole piece. If that was the only threat created by the move 36 c6!, then it could be satisfactorily met. But this pawn move also creates the devastating threat of 37 c7 and <promotion> on either the c8- or d8-squares (38 c8=♕ or 38 cxd8=♕). <Black has no adequate defense to both of these threats, 37 ♘c5+ and 37 c7.>
Jun-14-05
Premium Chessgames Member
  YouRang: Rats. I missed a Tuesday puzzle, and I shouldn't have. Like Sneaky, I kept looking at f5 and Bh3. I didn't even notice the knight fork threat! Idiot, idiot, idiot...
Jun-14-05  Knight13: I didn't get this one but a 2200 rated player got this one.
Jun-14-05  ThomYorke: Moving a pawn to give place to another piece is a well known tool.
Jun-14-05  Jack Kerouac: C6 jumped out to me.Szabo Laszlo. One of the great chess names.
Jun-14-05  xxdsdxx: c6!!! Black's choice becomes take the pawn and lose the bishop (Forked by Knight [Kc5+]) or ignore the pawn, save the bishop, and lose the Knight (after c7!). Black's loss of a piece for a pawn [or 2] spells the end of this game when White trades down to the last remaining piece. GG.
Jun-14-05  Rocafella: I got this very quickly. I'm quite pleased with myself!
Jun-14-05  Turbine2k5: 30. c6 was my first thought, but I started to look at other options (Nd2,Bg3+,h4). Very good puzzle!
Jun-14-05  zb2cr: <Marco65>,

Your analysis coupled with <patzer2>'s looks convincing. Thanks. Trying to analyze without a board due to being at work does not make for accuracy.

Jun-14-05
Premium Chessgames Member
  Ron: This whole game seems to me to exemply Smyslov's approach to chess. I imagine that somewhere before his 35th move, Smyslov judged (intuitively?): "I have an objectively won game."
Jun-15-05  Marco65: <zb2cr> I also analyse just looking at the web page, therefore never trust me too much! While patzer2's analysis is normally flawless.
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