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Rauf Mamedov vs David Shengelia
Batumi op (2001), Batumi GEO, rd 8, Jul-04
Sicilian Defense: Najdorf Variation (B90)  ·  1-0

ANALYSIS [x]

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sac: 39.Rf7+ PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Apr-28-06  YouRang: <azchess> On the other hand, Black can improve with 39. Qh6+ Kg8 40. Ra7 Rxd6 41. Ra8+ <Rd8>. After exchanging rooks, White can take the g6 pawn (with check) and then the a6 pawn. White is better, but only by a pawn...
Apr-28-06  YouRang: <Open Defence> But after 41...Re6, I think 42. Ra8+ will be mate shortly.
Apr-28-06  fgh: I got this one complete. Nice puzzle.
Apr-28-06
Premium Chessgames Member
  Richard Taylor: I solved this - I found the key move immediately it is clear that White is winning - Black needed to do better against the English varition of the Najdorf - someone played f3 v me and I got a good game by getting d5 in... The combination played was excellent by White and also his overall attack was instructive.
Jan-22-20  Cheapo by the Dozen: White wants to divert Black's queen and, surprisingly, the forceful 39 Rf7+ diversion actually works!

I'll confess, however, to not having worked through every nuance of avoiding perpetual check. :)

Jan-22-20
Premium Chessgames Member
  agb2002: Black threatens Rxd6.

White can simplify the position with 39.Rf7+ Qxf7 40.Qh8+ Qg8 41.Qf6+ Qf7 (41... Ke8 42.Qe7#) 42.Qxd8+:

A) 42... Kg7 43.Qc7

A.1) 43... Qxc7 44.Qxc7 and 45.c8=Q wins.

A.2) 43... Kf8 44.d7 followed by d8=Q.

A.3) 43... c3 44.d7 Qf1+ 45.Ka2 Qf7+ 46.b3 Qf2 47.d8=Q+ Kh6 48.Qxe3 wins.

B) 42... Qe8 43.Qc7 as above (43... Qa8 44.d7 Ke7 45.d8=Q+ wins).

Jan-22-20  ndg2: I started with the right idea 39.Tf7, but couldn't make it work after 41..Qe8, because I couldn't imagine how forcing 43.Qc7 already is. Pawn d6 is unstoppable and will queen. There's no perpetual and no black queen/king combo can interfere and block the white d pawn.
Jan-22-20  Walter Glattke: Petite combinaison with rook change, forces d-pawn transformation. 37.-Rxd6 38.Qh7+ Kf8 39.Rb7 Rd1+ 40.Ka2 Qf6 I am not sure, whether 37.-c4 is a blunder.
Jan-22-20  mel gibson: I wish I would have looked longer -
it seems simple once you're shown.

Stockfish 10 says mate in 24:

39. Rf7+

(39. Rf7+ (♖e7-f7+ ♕f6xf7 ♕h7-h8+ ♕f7-g8 ♕h8-f6+ ♕g8-f7 ♕f6xd8+ ♔f8-g7 d6-d7 c4-c3 b2xc3 ♕f7-f1+ ♔b1-b2 ♕f1-f7 ♕d8-c8 ♕f7-f5 d7-d8♕ ♕f5xc8 ♕d8xc8 a6-a5 ♕c8-c7+ ♔g7-f6 ♕c7xa5 g6-g5 ♕a5xb5 g5-g4 ♔b2-a2 ♔f6-e6 a3-a4 g4-g3 a4-a5 g3-g2 ♕b5-c6+ ♔e6-e7 ♕c6xg2 ♔e7-f7 ♕g2-f3+ ♔f7-g6 a5-a6 ♔g6-g7 ♕f3-f5 ♔g7-g8 a6-a7 ♔g8-g7 a7-a8♕ ♔g7-h6 ♕a8-f8+) +M24/52 248)

Jan-22-20  saturn2: I looked at 39. Rf7+ 

39...Qxf7 40. Qh8+ Qg8 (Ke8 41.Qe7 mate) 41. Qf6+ Qf7 42. Qxd8+ Kg7 

and the advanced free pawn decides for example 43. d7 Qf8 44. Qc8 

Jan-22-20
Premium Chessgames Member
  woldsmandriffield: 39 Rd7 is also very strong.
Jan-22-20  GlennOliver: If today's puzzle was "Medium / Easy" then I despair for my game.

Not only is White's key winning move 39. Rf7 entirely counter-intuitive to a lesser player.

The seemingly natural White consolidation move 45. c3 cedes the draw -

45. c3 Qe1+ 46. Ka2 Qd1 etc.

Jan-22-20  GlennOliver: I mean playing the natural but mistaken move 45. c3 rather than Mamedov's correct winning move of 45. Qc8
Jan-22-20  goodevans: <Walter Glattke: [...] I am not sure, whether 37.-c4 is a blunder.>

Depriving his own Q of the c4 square certainly hampered black's defence so I would say it was.

Imagine the same combo if instead he'd played <37...a5>. After <38.Qh7+ Kf8 39.Rf7+ Qxf7 40.Qh8+ Qg8 41.Qf6+ Qf7 42.Qxd8+ Qe8> we reach this position.


click for larger view

If white now tries <43.Qc7> as in the game then black has <43...Qe1+ 44.Ka2 Qe2>


click for larger view

... and the threat of repetition with <45...Qc4+ 46.Kb1 Qf1+> prevents white making any further progress.

Jan-22-20  TheaN: What a forcing show of deflections here. Pretty unique queen maneuver; after <39.Rf7+! Qxf7 40.Qh8+ Qg8 41.Qf6+ Qf7 (Ke8 42.Qe7#) 42.Qxd8+ Qe8 (Kg7 43.Qc7 +-)> the queens have 'danced' around the short diagonals and the f-file, essentially just trading rooks. The key is that it's White to move in a favorable position.

Initially I thought White could force the 'dance' back with 43.Qf6+? Qf7? (if Black plays it methodologically) 44.Qh8+ Qg8 45.Qxg8+! +- and the d-pawn wins it. However, after 43....Kg8 White is tempos short to bring the d-pawn home, and 44.d7?! Qxd7 45.Qxg6+ with 46.Qxa6 ⩲ is unlikely enough for the win.

However, then you notice the simple <43.Qc7 +-> and you realize Black's helpless against the d-pawn because the king's cut off. Everything that follows is just technique and avoiding the perpetual.

Jan-22-20
Premium Chessgames Member
  chrisowen: The winding road nah?
Jan-22-20  laskereshevsky: See quite easily the line Rf7+/Qh8+/Qf6+/Qxd8+, but here on the 2 possible B's defences (Qe8/Kg7) took me a quite long tought to see Qc7...
Jan-22-20  Momentum Man: I found all the moves through 42.Qxd8+

I am ok with this

Jan-22-20  Damenlaeuferbauer: After long pondering, my old Azeri friend Rauf, who was just 13 years young, when the game was played, finally found 39.Rf7+!,Qxf7 40.Qh8+,Qg8 41.Qf6+,Qf7 42.Qxd8+,Qe8 (42.-,Kg7 43.Qc7! +-), but should have continued 43.Qc7! +-. In both cases, white will get a second queen.
Jan-22-20  AlicesKnight: Found the right line; after regaining the R White will queen the P and the question is how Black will prolong things.
Jan-22-20
Premium Chessgames Member
  samvega: Witty combination. Put a smile on my face.
Jan-22-20
Premium Chessgames Member
  gawain: Very instructive puzzle. (No, I did not get it.)
Jan-22-20  saturn2: <goodevens> After <37...a5 instead of c4> black could be lost anyway if white apllies the game combo

38. Qh7+ Kf8 39. Rf7+ Qxf7 40. Qh8+ Qg841. Qf6+ - Qf7 42. Qxd8+ Qe8 

<by 43.Qxa5 instead of Qc7> Kf7 (Qd7 44. Qc7 Ke8) 44. Qc7+ Ke6 45. Qxc5

I dont see a good move 37 for black but it is not a Stockfish analysis.

Jan-23-20
Premium Chessgames Member
  Check It Out: This combination made a lot more sense on second look.
Jan-23-20  goodevans: <saturn2: [...] I dont see a good move 37 for black...>

White is definitely better in this position whatever black plays. My point (or, to give credit where it's due, <Walter Glattke>'s point) was that <37...c4?> turned the position from bad to completely lost.

Against your suggested <43.Qxa5> I would again threaten perpetual with <43...Qe2>. White may still win from there but there's work to do.

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