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Rustam Kasimdzhanov vs Ivan Cheparinov
FIDE Jermuk Grand Prix (2009), Jermuk ARM, rd 9, Aug-18
Semi-Slav Defense: Stoltz Variation (D45)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Aug-04-19  goodevans: I recognised this instantly. Having spent so much time analysing it last time around I'd have been gobsmacked if I hadn't.

My post from last time around gives an analysis of the correct winning line which is <not what was played in the game>.

Aug-04-19  hcgflynn: 31. - Re8 seems way too passive.
Aug-04-19  RandomVisitor: After 26.Nxf7 Kxf7 27.Rd7+ Kg8 28.Qg4 Rh6 29.Rxb7 material is even but white is (apparently) winning:


click for larger view

Stockfish_19062709_x64_modern:

<60/127 6:28:05 +2.42 29...Rc8 30.Qg2 Rxc3 31.bxc3> Qd2 32.Rd1 Qxe3+ 33.Qf2 Qxf2+ 34.Kxf2 Ng7 35.Bg4 Rxh2+ 36.Kf3 Rc2 37.Rd6 Rxc3+ 38.Ke2 Rc2+ 39.Kd3 Rc8 40.Bxe6+ Nxe6 41.Rxe6 Rf8 42.Rxa6 Rf7 43.Rxf7 Kxf7 44.Rb6 Bd8 45.Rxb5 Ke6 46.Ke3 Bf6 47.Rb7 Bc3 48.Rb6+ Kf7 49.Kd3 Bf6

59/92 6:28:05 +3.08 29...Bxc3 30.Rxc3 Qb1+ 31.Kg2 Qf5 32.Qg5 Rh7 33.Qxf5 exf5 34.Rb6 Rg7 35.Rcc6 Rd8 36.Rxg6 Rd2 37.Kf3 Rxg6 38.Rxg6+ Kf7 39.Rxa6 Rxb2 40.Ra5 Kg6 41.Rxb5 Rd2 42.Rb1 Rd6 43.h4 Ng7 44.Rb5 Nh5 45.Bc4 Ng7 46.Rb8 Rc6 47.Bb3 Rf6 48.Rc8 Rd6 49.Rc5 Rb6

Aug-04-19  RandomVisitor: After 22.Bd2 black can play 22...Rh8 instead of immediately taking the c5 pawn


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Stockfish_19062709_x64_modern:

<43/67 08:49 0.00 22...Rh8 23.Qf2 Qxc5> 24.Rac1 Qe7 25.h4 Rac8 26.Rxc8 Rxc8 27.Bxh5 gxh5 28.Qe2 Bxg5 29.hxg5 b4 30.a3 e5 31.Bxb4 Qe6 32.Bc3 Qh3 33.Rd6 Kg8 34.Qd2 Qh1+ 35.Kf2 Qf3+ 36.Ke1 exf4 37.exf4 Qh1+ 38.Kf2 Qg2+ 39.Ke1 Qh1+

Aug-04-19  mel gibson: Why are we repeating games?
I replied to this before and my reply is above.
Aug-04-19
Premium Chessgames Member
  saffuna: <Why are we repeating games? >

Asks <Mel gibson>, star of "Mutiny on the Bounty," Mad Max 2 , Mad Max 3, Lethal Weapon 2, Lethal Weapon 3, and Lethal Weapon 4.

Aug-04-19  mel gibson: saffuna - very funny.
Aug-04-19  goodevans: Actually the repetition of this puzzle gives me the opportunity to expand a little on a couple of the throw-away remarks in my earlier analysis. This starts with the sequence <26.Nxf7 Kxf7 27.Rd7+>. I said:

"Now the only move that doesn't lose heavily is <27...Kg8>."

<Later in this post I'll show how 27... Ke8 compares.>

I went on with:

"White's next move is crucial. 28.Rxb7 is met by 28...Nxf4 so white must play the clever intermezzo <28.Qg4> (threatening 29.Qxg6+) before taking the B next move."

<Here's what happens if white DOESN'T play 28.Qg4>:

After <28.Rxb7 Nxf4 29.Qf3 Nxe2+ 30.Qxe2> we reach this position.


click for larger view

Black can now take almost all the sting out of white's attack with <30...Bxc3>. Hence the need for 28.Qg4.

Compare this with what happens after <27... Ke8>. After <28.Rxb7 Nxf4 29.Qf3 Nxe2+ 30.Qxe2> we reach the same position except with the K on e8 rather than g8.


click for larger view

Now <30...Bxc3> would lose to <31.Qf3> with joint threats of 32.Qc6+ and 32.Qf7+. Unable to play 30...Bxc3 black will end up losing at least a piece.

I was never truly happy with those two off-hand statements in my earlier post, but I'm happier now.

Aug-04-19  SpamIAm: After 26.Rd7 couldn't black have replied 26...Nxf4? Does white have a knockout punch after 27.Rxf7+ Kg8? Just asking.
Aug-04-19
Premium Chessgames Member
  Pedro Fernandez: Okay, I saw 26.Rd7 Bxc3, but 27.Qxe6!!? Never ever! I analyzed 27.Rxb7 but I got nothing.
Aug-04-19  RandomVisitor: After 26.Nxf7 Kxf7 27.Rd7+ Kg8 28.Qg4 Rh6 29.Rxb7, but this time with 6 piece tablebases turned on:


click for larger view

Stockfish_19062709_x64_modern:

<56/78 11:40:41 +2.95 29...Bxc3 30.Rxc3 Qb1+ 31.Kg2 Qf5> 32.Qg5 Rh7 33.Qxf5 exf5 34.Rb6 Rg7 35.Rcc6 Kh7 36.Kf2 Kh6 37.Bd3 Kh7 38.Rd6 Rf8 39.Rxa6 b4 40.Rab6 Rff7 41.Kf3 Rf8 42.Bc4 Rc8 43.Bb5 Rgg8 44.Bd3 Rcf8 45.Kf2 Rg7 46.Be2 Kh6 47.Kf3 Rgg8 48.Bc4 Rg7 49.h4 Kh7

56/128 11:40:41 +3.71 29...Rc8 30.Qg2 Bxc3 31.Bxh5 Rf8 32.Bxg6 Qxb2 33.Bc2+ Kh8 34.Rd1 Bf6 35.Ra7 b4 36.Kh1 b3 37.Ra8 Bg7 38.Rxf8+ Bxf8 39.Rg1 Qg7 40.Qa8 Qe7 41.Bxb3 Rf6 42.Qxa6 Qb4 43.Bc2 Qc5 44.Qa1 Qd5+ 45.Rg2 Qd8 46.Rg5 Qe7 47.Qa8 Rh6 48.Rg1 Rf6 49.Rg2 Qf7

Aug-04-19
Premium Chessgames Member
  Pedro Fernandez: <<SpamIAm>: After 26.Rd7 couldn't black have replied 26...Nxf4?> It would be a suicide my dear <SIAm>, due to 27.Bxf6+! Kxf6 <unique!>, and now 28.Rxf7+! <much stronger than 28.Rxb7?!>


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28...Ke5 <again unique, 28...Kxg5? 29.exf4 mate> 29.exf4+!


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<this opens third row for the white queen> 29...Kd6 30.Qd3+ Qd5 31.Ne4 mate.


click for larger view

Aug-05-19
Premium Chessgames Member
  al wazir: I screwed up the notation in my post. Here is what I should have written:

After 42. Rxe6+ Kg7, there is nothing better than 43. Rg6+ Kxf7 44. Rg1 a1=Q 45. Rxa1 Rxa1 ...

I think the rest of the moves are right. The exact sequence after 48...Rc3 isn't fixed, but the key move is Bb5, preparing to promote on d8.

Aug-11-19  NBZ: This game must be well-connected. It managed to get invited to the Chessgames front page 3 times this summer!
Aug-11-19
Premium Chessgames Member
  agb2002: Level 4: 25.?
Lasker vs Teichmann, 1909


click for larger view

Aug-11-19
Premium Chessgames Member
  morfishine: Re-re-re-recycled
Aug-11-19  mel gibson: <Aug-11-19 morfishine: Re-re-re-recycled >

Obviously someone running this could be sick or out of time. Maybe they could hand over the job to a keen
paid up member to keep it going with new puzzles - until the problem is over?

Aug-11-19  Hercdon: Thanks agb2002 for taking the boredom out of the Sunday puzzle!
Aug-11-19
Premium Chessgames Member
  Breunor: I didn't have a chance of getting this the first time but I got it right away this time!
Aug-11-19
Premium Chessgames Member
  agb2002: <Hercdon> 'Recycled' became too much recycled and there are better alternatives: Kasparov vs G Hjorth, 1980 (kibitz #73)
Aug-11-19  HaydenB: Terrible choice for a Sunday insane puzzle. The first move was only 3rd best and should've led to a draw. SOUND COMBINATIONS ONLY PLEASE!
Aug-11-19  jes47: No seems to have posted an easy refutation. After 26 Rd7 Bc3 27 Qe6 Bd5! is equal. For example 28 Rf7+Kh6 29 Qd7 Bg7 30 Rg7 Ng7 31 Rc7 Qb2 32 Qd5 Qe2 33 Nf7+ Kh7 34 Ng5+ Kh6 and stockfish gives the position as dead even.
Aug-11-19  cormier:


click for larger view

Analysis by Houdini 4 Pro w32:

1. = (0.09): 17.Ne4(!! this line is winning with correct play) Bxe4 18.Bxe4 Rae8 19.Bf3 Be7 20.Qe4 Rc8 21.Bd2 cxd4 22.Rac1 Nc5 23.Qb1 dxe3 24.Bxe3 Qe5 25.Qc2 Rcd8 26.b3 Rxd1+ 27.Rxd1 Qf5 28.Qc1 b4 29.Qc4 a5 30.Qb5 Ne4 31.Qd7

2. = (-0.20): 17.g4 Nf6 18.gxh5 Nxh5 19.dxc5 Bxc5 20.b4 Qe5 21.Bb2 Qxb2 22.bxc5 Nf6 23.Be4 Bxe4 24.Nxe4 Nxe4 25.Qxe4 Rac8 26.c6 Rfd8 27.a4 Rxd1+ 28.Rxd1 Qc3 29.axb5 axb5 30.Rd6 Kg7 31.Qf3 b4 32.Rd7 Qf6 33.Qxf6+ Kxf6 34.Rb7 Rxc6 35.Rxb4 e5 36.Rb7 g5 37.Kg2 Kg6 38.Kf3 f5 39.Kg3 Kf6 40.h4

Aug-11-19  cormier:


click for larger view

Analysis by Houdini 4 d 23 dpa done

1. = (0.14): 13...Bb7 14.Bd3 g6 15.Qh4 c5 16.Ng5 h5 17.Ne4!

2. + / = (0.28): 13...c5 14.Qxa8 Bb7 15.Qa7 Ra8 16.Qxa8+(! winning at long term with precise play) Bxa8 17.dxc5 Nxc5 18.Bd2 Ne4 19.a4 Nxd2 20.Rxd2 Bxf3 21.Bxf3 bxa4 22.g3 Bb4 23.Rd4 a5 24.Bd1 a3 25.bxa3 Be7 26.Rd3 Qc6 27.Rb1 g6 28.Rb8+ Kg7 29.a4 f5 30.Rb5 Bb4 31.Bb3 Kf6 32.Rd1 Bc3

Aug-11-19  RandomVisitor: After 26.Rd7 Bxc3 medium length runs show that white has no advantage:


click for larger view

Stockfish_19062709_x64_modern:

47/14 32:43 0.00 27.Qxe6 Qxe6 28.Nxe6+ Kh6 29.Ng5 Bc8 30.Nxf7+ Kg7 31.Rc7 Ba5 32.Re7 Bb4 33.Rec7

46/44 32:43 0.00 27.Rxf7+ Kg8 28.Rxb7 Nxf4 29.Qf3 Nxe2+ 30.Kf1 Rxh2 31.Qf7+ Kh8 32.Qxg6 Ng3+ 33.Kg1 Rh1+ 34.Kf2 Rf8+ 35.Nf7+ Rxf7+ 36.Rxf7 Qxb2+ 37.Kxg3 Be5+ 38.Kf3 Rh3+ 39.Ke4 Rxe3+ 40.Kxe3 Qxc1+ 41.Ke2 Qc4+ 42.Kd1 Qa4+ 43.Kd2 Bf4+ 44.Ke2 Qc4+ 45.Qd3 Be5 46.Qxc4 bxc4 47.Ra7 Kg8 48.Rxa6

46/52 32:43 0.00 27.Qg4 Rhf8 28.Qxe6 Bd5 29.Qxd5 Qxd5 30.Rxd5 Nf6 31.Rd3 Bb4 32.Rc7 Rac8 33.Ra7 Rce8 34.Rxa6 Bc5 35.Kf2 Rxe3 36.Rxe3 Re8 37.Ne6+ fxe6 38.Rc6 Bxe3+ 39.Kxe3 Nd5+ 40.Ke4 Rf8 41.Bxb5 Rxf4+ 42.Ke5 Rf5+ 43.Kd6 Rh5 44.Bc4 Kf6 45.Rc5 Rxh2 46.Bxd5 Rd2 47.b4 exd5 48.b5 d4 49.Rd5 Rb2 50.Kc5 d3 51.Rxd3

46/75 32:43 -0.45 27.Rxb7 Nxf4 28.Rxf7+ Kg8 29.Qf1 Nxe2+ 30.Qxe2 Qd5 31.Rf4 Qxg5+ 32.Rg4 Qh5 33.bxc3 Kg7 34.Qg2 Rad8 35.Kh1 Rh6 36.c4 bxc4 37.Rg1 Kh7 38.Qb7+ Kh8 39.Qb2+ e5 40.Rxc4 Qf3+ 41.Qg2 Qxe3 42.Rc6 a5 43.Rf1 Rg8 44.Ra6 Rh4 45.Rxa5 Rf4 46.Rg1 g5 47.Qc6 Kh7 48.Ra6 Qe4+ 49.Qxe4+ Rxe4 50.Rf1 Rg6 51.Raa1 Kh6 52.Rae1 Rxe1 53.Rxe1 Re6 54.Kg2 Kg6 55.Kg3 Kf5 56.Rf1+ Ke4

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