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Vladimir Epishin vs Yuri Dokhoian
USSR (1986)
King's Indian Attack: Sicilian Variation (A08)  ·  0-1
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Given 9 times; par: 50 [what's this?]

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find similar games 1 more Epishin/Y Dokhoian game
sac: 34...Bxf4 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Jul-23-11  stukkenjager: How to proceed after 31.f4 ??
Jul-23-11  sevenseaman: I've looked at the positon long and hard for over
5 minutes.

The best looking option in fromt of Black is if
somehow he could open his strongly tenanted 'f'
file which is presently blocked by the two opposing
pawns.

In my view the most suitable candidate to achieve
that is the N moving to g4. Its a sac but is
clearly double-edged. The opposing Ps gracefully
move out and the 'f' file becomes a flash point.

The assumption is White will not take the N. Its
not easy to decide the best move for White but
Black's next looks to be f4 and we go on from there.

I cannot say I see the denouement clearly.

Jul-23-11
Premium Chessgames Member
  David2009: Epishin vs Y Dokhoian, 1986 Black 30?

Try 30...f4 expecting 31.Rxe5 fxg3 32.hxg3 Rh1 33.Rf5 - no good, Or 32...Rh2 33.Rxf5 Bc5 34.Re2 Rh1 35.Rg2 - no good either Try 30...Qh5 expecting 33.Rxe5 Qxh2 and now (A) 34.Rxf5 Bc5 is strong, so (B) 34.R5e2 Qxg3 - this is unclear and I don't like it. A quiet alternative is 30...Nc6 when it is uncomfortable for White and would be my OTB choice. Time to check and see what I have missed:
====
30...Ng4! - so simple when you see it. Here's the puzzle position


click for larger view

and here's it colours reversed


click for larger view

with Crafty End Game Trainer link http://www.chessvideos.tv/endgame-t...

The EGT meets 30...Nc6 with 31.b4! forestalling the intended 31...d5, and meets the game line 30...Ng4 with 31.h3! Time to read the other kibitzes to see how Black should continue after 31 h3.

No-one has suggested 31.h3. The EGT does indeed meet my team-mate (on Team White vs Team Black, 2011) <morfishine>'s 30...f4 with the line I had analysed, so I got that bit right. The challenge is to find a winning line without using silicon: enjoy!

Jul-23-11  gofer: I can see a nice little threat that starts with a knight sacrifice, but I don't think white will accept the knight sacrifice. In which case, we have a more difficult proposal on our hands! But after a while it looks like black may have no choice but to accept, there isn't much else he can do, losing Ph2 isn't going to help his chances in the longterm!

<30 ... Ng4>

31 fxg4 fxg4+
32 Kg7 Qh5
33 Kh1 Bxg3 (33 Kxg3 Qf4+ 34 Kg2 Rxh2#)
34 h3 gxh3 (34 Qc2 Qh4! winning)

Time to check...

Jul-23-11  scormus: Didnt get this. I went with 30 ... f4 expecting 31 g4 Nxg4 32 fxg4 f3 33 Rf2 but then none of the continuations looked decisive.

33 ... Bc5 is tempting but after Rxf3 the Qsac it doesnt quite work, and ... bxh2 and ... Qf4 are unclear as well.

Jul-23-11  VincentL: "Very Difficult."

I only have about two minutes to look at this. The move that springs to mind is 30.....Ng4. If white takes the knight, it looks curtains after the discovered check fxg4+. If white declines the sacrifice, I am sure there are challenging defences, which unfortunately I havenīt got time to consider.

Letīs check to see if I am on the right track.

Jul-23-11  LIFE Master AJ: White was slowly outplayed, this was actually a line in the Grunfeld, however, colors are reversed.

No time for a full analysis (or checklst) this morning, I am going to be gone all day teaching chess.

White threatens to capture the Knight on e5, so a ♘ move is pretty much forced, I would not take the time to protect it nor retreat it.

Black plays 30...Ng4; taking is suicide for White. (31.Qc2 to guard h2?) Then Black has "sack" (line opening) ideas with ...f5-f4.

Funny, I think I remember gping over this game with a friend - we had the latest "Informant" at the time. (Old days! No PC, No Internet, only way to get those kind of games was INF for subscribe to a magazine.) Don't remember how the game ends though, maybe I will have a chance for more analysis and comments later on this evening.

Jul-23-11
Premium Chessgames Member
  kevin86: I had no idea-this was too deep for me.
Jul-23-11  Creg: As expected these weekend puzzles give me a headache. I've been lookking at this for awhile. I think black needs to open lines to the white king. This means, to me, opening the f-file, and the dark diagnol b8-h2 for our bishop. To accomplish these goals I am looking at:

30...f4 if,
31.gf Qxf4 I think this is bad for white to have his king so exposed. There are too many ways for black to infiltrate. So I looked at

30...f4 31.g4 Nxg4 32.fxg4 f3 33.Rf2 Rxh2 34.Rxh2 (34.Rxf3? Rf2+ and mate next move) 34...f2 35.Re2 Bxh2 36.Nh3 Qf3 37.Nxf2 (37.Rxf2 allows 37...Qxh3+ and Black regains his piece with advantage) 37...Qh1 mate! I forgot the knight at f2 will be pinned. Some of this might be wrong, but I think I'm on the right track. -----------
LOL - Not even close. I eschewed black's key move so fast that I never thought about it again... LOL, that's funny. :)

Jul-23-11
Premium Chessgames Member
  Jimfromprovidence: I loved 31...f4 for two reasons. It sets up 32...Ne3+, winning the exchange after 32 h3.


click for larger view

It prevents 32 fxg4 because after 32...fxg3+, below, white cannot play 33 Rf2, which was the point of 31 Qc2.


click for larger view

Still, as <stukkenjaggger> noted, what if white got to f4 first with 31 f4?


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All I see here is through 31...Nxh2+ 32 Kg2.

Jul-23-11  stukkenjager: again no ko-win on saterday

30...Ng4 31.f4 Nxh2+ 32.Kg2 g5
(32...Bc5 33.Qd1 Qh5 34.Bc4! dxc4 35.Qd5+ Qf7 36.Qxc5 b6 37.Qd4 Qb7+ 38. Kf2) (32...Bxf4 33.gxf4 Qg6+ (33...Qh5 34.Re3 Rg6+ 35.Rg3 Rxg3+ 36. Kxg3 g5) 34.Kf2 Ng4+ 35.Kf1 Rh1 36.Qc1 Qh5 37.Rg2 Qh3 38.Qd1 Kh8) (32... Bb8)

33.fxg5 Rh5 34.Re6 Bxg3 35.Kxg3 Qc7+ (35... f4+ 36. Kf2 Ng4+ 37.Kf3) 36.Kf2 Qf4+ 37.Ke2 Nf1 38.Nf3 Ng3+ 39.Kd1 Qxf3+ 40.Kc2 Rh2+ 41.Kb3 Ne4 42.Bxe4 dxe4 43.Re7

Jul-23-11  Patriot: Time limit: 10 minutes with chess clock.

Material: Even
Threats: 31.Rxe5
Initial candidates: Nxd3, Nxf3, Rxh2

30...Nxd3 was the only reasonable candidate here, but it doesn't look strong after 31.Qxd3. It's not unreasonable to consider a move like this OTB but you should be looking for something better if you have the time--something promising. I thought white may be a little better there since it centralizes the queen which hits d5, even though anything immediately tactical didn't present itself. After several minutes into this puzzle, I added another candidate: 30...Ng4. White's position looks very bad after 31.fxg4 fxg4+ 32.Kg2 Qh5. I figured white's best may be 31.Qc2 to add additional support. I didn't really see what may happen here but it's not like 31.Qc2 is going to really worry white. The only thing you have to be careful about is the knight being snapped off where white is able to defend.

After seeing what was played I thought...WOW! I never considered 31...f4 but it's an even more amazing finish after that.

Jul-23-11  Patriot: That's interesting. I thought 30...Nxd3 31.Qxd3 favored white but Houdini says it slightly favors black *IF* 31...f4 is played. Everything else favors white. Again I missed ...f4. Maybe I need to study pawn play.
Jul-23-11  jheiner: <Jimfromprovidence said: All I see here is through 31...Nxh2+ 32 Kg2.>

Nice analysis. I particularly liked the comments on 32...Ne3+ winning the exchange.

As for: 31...Nxh2+ 32.Kg2

Simply the quiet retreat 32...Ng4

I don't know what the computers say, but just on principal, I would hate to be White here.


click for larger view

Black is a P up, probably more shortly.
The Black K is secure.
Black controls the center.
Black has an outpost N.
Black has a R lift to h6 and the h file is open.
The Black Q is coming to h5, maybe after Rh2+, maybe before. The White Pg3 is weak.

Jul-23-11
Premium Chessgames Member
  patzer2: Is there a win for Black in our Saturday puzzle with 30...Ng4! after all?

The position gets difficult as several posters observe after 30...Ng4! 31. f4!? Nxh2+ 32. Kg2 (diagram below).


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It would seem Black gets a strong and lasting advantage with 32...Bc5! 33. Qd1! (33. Qa2 Rd8 34. Nh3 Nf3 35. Re8+ Rxe8 36. Rxe8+ Qxe8 37. Qxd5+ Qf7 38. Qxc5 Ne1+ 39. Kg1 Nxd3 40. Qc8+ Qf8 41. Qc4+ Kh8 42. Ng5 Qc5+ 43. Qxc5 Nxc5 ) 33... Qh5 (diagram below)


click for larger view

In this position, White seems to be walking a tight rope to barely hang on, but may be able to survive after 34. Bc4! dxc4 35. Qd5+ Qf7 36. Qxc5 b6! 37. Qd4 Qb7+ 38. Kf2 Ng4+ 39. Kf1 Qc6 40. Re7 Rg6 41. R1e6 Qxe6 42. Rxe6 Rxe6 43. Nf3 Rfe8 44. Kg1 Kh8 45. Qd7 (diagram below).


click for larger view

While there is no quick forced win, Black is clearly better in this position. This suggests to me that today's 30...Ng4! is at least a sham sacrifice to win a pawn for a clear positional advantage.

P.S.: I'm analyzing with an old Fritz program, so would appreciate if anyone with a strong program would share any improvements.

Jul-23-11  CHESSTTCAMPS: In this opposite-colored bishops middlegame position, material is even, but white has a passive knight and a loosening of the king's pawn shelter. The lifted black rook at h6 provides additional evidence of a black advantage. It took me a while to find the most promising candidate, but the doubled majors on the file of the WK should have tipped me off quickly:

30... Ng4! is just the right move to probe the weakened castle. The DSB gives black an extra piece on the kingside to make up for the sacrificed knight.

31.cxb4 cxb4+ 31.Kg2 Qh5 (32... Bxg3? appears to be refuted by 32.Rf1!) 32.Kh1 Bxg3 33.Qc2 Bxe1 34.Rxe1 g3 (threatening mate-in-2) 35.Re2 (h3 Rf2 36.Re2 Rf1 37.Kg2 Rxg1+ 38.Kxg8 Qxh3 wins) Rf1 39.Kg2 (otherwise 39... Qf3+ 40.Rg2 Rxh2#) gxh2! and black gets a winning promotion.

If white declines with 31.h3, Bxg3 continues a ferocious attack, but I don't have time for detailed analysis now.

Time for a quick review...

Jul-23-11
Premium Chessgames Member
  patzer2: While 30...f4 "wins the exchange" after 31. Rxe5 Bxe5 32. Rxe5 Rxh2 33. g4 g6 34. Re2! Rxe2 35. Nxe2 (diagram)


click for larger view

White is equal or even slightly better with two pieces for the Rook.

Jul-23-11  CHESSTTCAMPS: As I suggested in my post (and as mentioned by <David2009>) the EGT declines with 31.h3 (h6 in the colors-reversed position). I immediately essayed my suggested Bxg3 (Bxg6) and a tactical melee followed that ended in a draw. But there are likely improvements to be found...
Jul-23-11
Premium Chessgames Member
  patzer2: For a winning line against Crafty's 31. h3 try 31...Bxg3! 32. hxg4 fxg4 33. Re7 Qf4 34. R1e3 Rh2 35. Bxh7+ (35. Re2 Rh1 36. R2e3 Bh2 37. Kf2 gxf3 38. Nxf3 Qg3+ 39. Ke2 Qg2#) 35... Kh8 36. Qg6 Rf2+ 37. Ke1 Rxf3+ 38. Kd2 Rf2+ 39. Ne2 Rxe2+ 40. Kxe2 Qf1+ 41. Kd2 Rf2+ 42. Re2 Bf4+ 43. Kc2 Rxe2+ 44. Rxe2 Qxe2+ 45. Kb3 g3 46. Qf5 (46. Qf7 Qc4+ 47. Kc2 Kxh7 48. Qh5+ Bh6 49. Qf5+ Kg8) 46... Bc1 47. Qb1 Qxb2+ 48. Qxb2 Bxb2 49. Kxb2 Kxh7 .
Jul-23-11  WhiteRook48: I got it!
Jul-23-11
Premium Chessgames Member
  patzer2: <jheiner> After 31. f4! Nxh2+ 32.Kg2 Ng4 (diagram in your post above), simply 33. Nf3 relieves the immediate tactical pressure on White's position and makes Blacks task more difficult.

Putting on more pressure is 32...Bc5! as it impedes White's development with the threat 33. Nf3?? Nxf3 34. Kxf3 Qh5+ 35. Kg2 Qh3+ 36. Rg3 with a mating attack.

Jul-23-11  stst: Again late & tired from a long working day (is it a Saturday?) Try this line, which contain "soft" spots:
30.... Ng4 (eyeing h2)
31.fxg4 fxg4dis+
32.Kg2(R or N inter-block invites fierce attack by Q) Qh5 33.h4 Bxg3 (remove guard of h4P)
34.Kxg3 Qxh4+
35.Kg2 Qh2#
not much energy left, just check....
Jul-23-11  stst: at least got the idea in 1st move 30....Ng4
(should explore the heavy defense of bring W's Q to help R to guard h2.)
Jul-25-11  LIFE Master AJ: 30.Rde2 Ng4! 31.Qc2!?

[<31.fxg4?? fxg4+ 32.Kg2 Qh5 ;

Best was: 31.f4! Nxh2+ 32.Kg2 Bc5! 33.Re5 Ng4! 34.Nf3 (</= 34.Rxf5?! Rh2+ 35.Kf3 Nh6! 36.Rxf7?? Rf2#) 34...Nxe5 35.Rxe5 (</= 35.Nxe5? Qh5 36.Rh1 Qxh1+ 37.Qxh1 Rxh1 38.Kxh1 g6; ) 35...Qh5 36.Nh4 Re8! 37.Rxf5 Qg4 38.Rg5 Re2+! 39.Bxe2 Qxe2+ 40.Kh3 Be7! 41.Rg4 Qf3 42.Qg1 Kf7!! 43.a5 Bf6 44.Qg2 Qd3! 45.Kh2 Be7! (zugzwang) (" ") (45...Be7! 46.f5 Qxf5 47.Qe2 Bxh4 48.Rxh4 Rxh4+ 49.gxh4 Qf4+ 50.Kh3 g6 51.Qd1 Ke6 52.Qb3 h5! 53.Qxb7 Qg4+ 54.Kh2 Qxh4+ 55.Kg2 Qg4+ 56.Kh2 Qc4 ) ]

31...f4! 32.Rg2?!

[Best was 32.h3▢]

32...fxg3!! 33.hxg3 Rh1 34.f4 Bxf4! 35.gxf4 Qxf4+ 36.Ke2 Ne3 37.Qb3 Nxg2 0-1

Jul-25-11
Premium Chessgames Member
  NM JRousselle: Can anyone help me to understand White's 11th move? White is playing a Gruenfeld Defense with a move in hand. For all the years I have played this defense, I don't ever recall moving the King's Bishop back to his home square so soon.
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