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Shakhriyar Mamedyarov vs Vassily Ivanchuk
"Mamed Said Knock You Out" (game of the day Nov-14-2007)
Tal Memorial (2007), Moscow, rd 3, Nov-12
Semi-Slav Defense: General (D43)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Given 21 times; par: 55 [what's this?]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 4 OF 4 ·  Later Kibitzing>
Oct-31-11  notyetagm: http://webcast.chessclub.com/Tal07/...

<LARRYC VARIATION>


click for larger view

37 ... ♕e8-a4


click for larger view

38 ♖d1-d5!! <overloaded: a4,d5> Δ ♖d1-h5+, mating


click for larger view

Oct-31-11  notyetagm: Game Collection: OVERLOADED: TTTCIE: THE THREAT TO CAPTURE IS ENO

Mamedyarov vs Ivanchuk, 2007 38 Rd1-d5!! Black b6-knight cannot protect a4-queen, d5-square

May-20-12  LoveThatJoker: Guess-the-Move Final Score:

Mamedyarov vs Ivanchuk, 2007.
YOU ARE PLAYING THE ROLE OF MAMEDYAROV.
Your score: 57 (par = 53)

LTJ

Mar-17-18  stacase: I went off the rails with 36. NxR instead of 36. Nexf4
Mar-17-18  Cheapo by the Dozen: I thought the answer was

33 Nxf4 exf4
34 e5,

but the engine thinks that's thoroughly unsound.

Mar-17-18  Walter Glattke: I also think, 33.Nxf4 exf4 34.e5 would win less spectacular.
Mar-17-18  Walter Glattke: 33.Bb7 Bxb7 34.d7 also wins.
Mar-17-18  alphee: I love this combination ... great
Mar-17-18
Premium Chessgames Member
  malt: Looked at 33.N:f4 ef4 34.e5 Kg7 35 Be4 first attempt

Then deflecting the Queen with
33.Bf7 Q:f7 34.N:e5 Qe8 35.N:g6 Rg8 36.Ne:f4 Bf6 37.Ne7 B:e7 38.R:g8 Q:g8 39.de7

had looked at 35.R:g6+ Kh7 also could not make it to work

Mar-17-18
Premium Chessgames Member
  patzer2: A Bishop sham sacrifice (i.e. 33. Bf7!!) leading to the win of three pawns and a decisive attack against the Black King wasn't on my radar in attempting to solve today's Saturday puzzle.

The pawn fork sham sacrifice (i.e. 37. d7!) follow-up deflects the Knight away from the action, and prepare the winning clearance move 38. e5!

After 38. e5!, Black is hopelessly lost in a mating net. For example if 38...Rg8, then 39. Qf5 Be2 40. Rd6 +- is crushing. The reply 38...Qxe5, allowing 39. Nxe5 +-, was apparently Black's way of admitting the obvious and resigning.

Mar-17-18
Premium Chessgames Member
  cormier:


click for larger view

Analysis by Houdini 4 : d 24 dpa done

<1. = (0.04): 16...Rb8> 17.h4 Re8 18.Ne2 e4 19.Nd2 Nf6 20.Ng3 Kg8 21.Rac1 Bd7 22.Ba2 b6 23.Bb1 c5 24.dxc5 bxc5 25.Qxc5 Rxb2 26.Qxe7 Rxe7 27.Nc4 Rb3 28.Nxa5 Rxa3 29.Nc4 Ra6 30.Red1 Bc6 31.Ne2 Rd7 32.Nc3 Rxd1+ 33.Rxd1

<2. = (0.20): 16...Re8> 17.Rac1 e4 18.Nd2 f5 19.Red1 Rd8 20.h3 Bf6 21.Ba2 Ra6 22.Bc4 Ra8 23.Ne2 Nb6 24.Ba2 Ra6 25.Re1 a4 26.Red1 Kg7 27.Rf1 Kh7 28.Nb1 Be6 29.Bxe6 Qxe6 30.Nf4 Qf7 31.Nc3 Bg5 32.Nfe2 Bf6 33.Rfe1 Ra7 34.Rf1 Qb3 35.Nf4

Mar-17-18
Premium Chessgames Member
  ChessHigherCat: I came up with the first move according to puzzle logic that Nxf4 is the most forcing, although my line probably doesn't foresee black's best defenses:

33. Nxf4 exf4 34. Rxg6+ Kxg6 35. e5+ Kh6 36. Qf5 Qg6 37. Qxf4+ Kh5 38. Bf7

Mar-17-18
Premium Chessgames Member
  ChessHigherCat: I guess I can take the cold comfort that I was not the only one to fall into that "thoroughly unsound" variation. Our charred bodies litter the wayside of the path to glory.
Mar-17-18
Premium Chessgames Member
  cormier: for the puzzle i tried the Ns sac but not the B one
Mar-17-18
Premium Chessgames Member
  cormier:


click for larger view

Analysis by Houdini 4

1. + / = (0.45): 20...Rd8 21.e4 Nc5 22.Na4 Nxa4 23.Bxa4 Qe6 24.Bb3 Qg4 25.Qe2 Bc8 26.Qd3 Qf4 27.Qc3 Bd7 28.Re3 Bh8 29.Bc4 b5 30.Ba2 a4 31.Qb4 Rg8 32.Rc1 Bg7 33.Qc5 Rb8 34.Bb1 Ra8 35.h5 gxh5 36.g3 Qf6

Mar-17-18
Premium Chessgames Member
  ChessHigherCat: <CHC: I guess I can take the cold comfort that I was not the only one to fall into that "thoroughly unsound" variation. Our charred bodies litter the wayside of the path to glory.>

Come off it man, what a cornball post! Are you even sure that your variant doesn't work?

Well, I was too busy to find the refutation earlier but I think this is it:

33. Nxf4 exf4 34. Rxg6+ Kxg6 35. e5+ Kh6 36. Qf5 Rf8 37. Qg4 Qh5

Mar-17-18
Premium Chessgames Member
  Breunor: I also went for 33 Nxf4 exf4 34 Rxg6ch Kxg6 35 e5 ch Kh6 36 Qf5;

According to Stockfish, this loses:

1) -6.55 (21 ply) 36...Nxd5 37.d7 Qh5 38.dxc8=Q Bxc8 39.Qxc8 Qxf3 40.Qc6+ Bf6 41.Qxd5 Qxf2+ 42.Qg2 Qxh4+ 43.Qh3 Qxh3+ 44.Kxh3 Bxe5 45.Kg4 Bxb2 46.Rd6+ Kg7 47.axb4 cxb4 48.Rb6 Rf8 49.Rb5 f3 50.Rg5+ Kh7 51.Rb5 Bg7 52.Rb7

Never considered Bf7!! Stockfish has 33 Bf7 as the only winning move:

1) +5.75 (21 ply) 33...Qxf7 34.Nxe5 Qe8 35.Nxg6 Rg8 36.Nexf4 Qf7 37.e5 b3 38.Qd2 Nc4 39.Qc1 Qf5 40.Ne6+ Bg5 41.Rxg5 Qxf2+ 42.Rg2+ Qe3 43.Ne7 Rxg2+ 44.Kxg2 Qxc1 45.Rxc1 Ra8 46.d7 Ne3+ 47.Kg3

Second best is 33 axb4, 0.23

2) +0.23 (28 ply) 33.axb4 Kg7 34.d7 Nxd7 35.bxa5 Bxh4 36.Kg2 c4 37.Rh1 Qe7 38.Qc3 Bf6 39.Rxh8 Rxh8 40.Bxc4 Bb7 41.Qd2 Nc5 42.Qd6 Bxe4 43.Qxe7+ Bxe7 44.Nc3 Bf5 45.Nxe5 Bf6 46.Nf7 Ra8 47.Nd5 Rxa5 48.Nd6 Bd7 49.Kg1 Be6 50.Nxf6

The computer confirms that the losing move is 32 Rh8:

1) -0.04 (27 ply) 32...Bb5 33.Rg2 g5 34.Bb7 Rb8 35.d7 Nxd7 36.Rd6+ Kh7 37.Bd5 Rb6 38.Rxb6 Nxb6 39.Nxg5+ Kh8 40.Ng1 Bf1 41.Qd1 Bxg2 42.Nf7+ Rxf7 43.Bxf7 Qxf7 44.Qxd8+ Kh7 45.Kxg2 Qg8+ 46.Qxg8+ Kxg8 47.axb4 cxb4 48.Nf3 Nd7 49.Nh2 Nf6 50.Nf3 Nxe4

A few years ago 18 Rc8 was questioned, but Stockfish has it as best:

1) -0.05 (34 ply) 18...Rac8 19.dxc6 Bxc6 20.Bd5 Bb5 21.Qd2 Ba6 22.Bb7 Bxb7 23.Qxd7 Qxd7 24.Rxd7 Rb8 25.e4 Bc8 26.Ra7 Be6 27.Rd1 Rfc8 28.h3 Rc6 29.Kh2 Rc4 30.Rd2 Kg8 31.Kg1 b5 32.Rxa5 b4 33.axb4 Rcxb4 34.Nxe5 Rxb2 35.Rxb2 Rxb2 36.Rc5 Bxe5 37.Rxe5 Rd2 38.Rb5

Mar-17-18
Premium Chessgames Member
  cormier:


click for larger view

Analysis by Houdini 4: d 24 dpa done

<1. = (0.00): 32...Kg7> 33.Rg4 Rh8 34.Bf7 Kxf7 35.d7 Qe7 36.dxc8Q Bxc8 37.Rg2 Bb7 38.axb4 axb4 39.Ra1 Bc8 40.Ra5 Nd7 41.Ra8 Nb6 42.Ra5 Nd7

<2. = (0.00): 32...Bb5> 33.Rg2 g5 34.Neg1 c4 35.axb4 axb4 36.Nh3 Ba4 37.Qe2 Bxd1 38.Qxd1 c3 39.bxc3 bxc3 40.Bb3 gxh4 41.Nxh4 Bxh4 42.Qg4 Bf6 43.Nxf4 exf4 44.Qxf4+ Kh7 45.Qf5+ Kh6 46.Qf4+ Kh7

Mar-17-18
Premium Chessgames Member
  agb2002: I know this game.
Mar-17-18
Premium Chessgames Member
  morfishine: Supposedly unsound is: <33.Nxf4> 33...exf4 <34.e5>

but I'm not so sure

*****

Mar-17-18
Premium Chessgames Member
  ChessHigherCat: <Morfishine> WG agrees with you:

<Walter Glattke: I also think, 33.Nxf4 exf4 34.e5 would win less spectacular.>

What's the continuation?

Mar-17-18  frdes: B4 is correct
Mar-17-18
Premium Chessgames Member
  morfishine: <ChessHigherCat> Thanks for looking. No update yet, but it doesn't look as good as it originally looked

*****

Mar-18-18  scholes: I had 33 Nxf4 exf4 34 e5 Nxd5 35 Rxd5 Qe6 36 Qe4 Rg8

According to stockfish this wins but black has very strong 36 .. Kg7. With one move black defends it king and launches very strong attack on white.

Jul-25-18  posoo: WHO wrote these NOTES? Uterly USELESS an SUPERFLOUS information! not helpful at ALL, especialy when da compoter is trying to tlak like a HUMAN!?

Bad analisis.

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