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Alexey Vyzmanavin vs Jaan Ehlvest
USSR Championship (1984), Lvov URS, rd 9, Apr-??
Trompowsky Attack: General (A45)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Feb-22-09  Woody Wood Pusher: Hey I got most of this, must be my lucky day!

haha

Feb-22-09  Patriot: At first glance, I thought well just play 25.Nxd6 threatening the queen by discovery and threatening 26.Nxf7+ winning a few pawns and a rook. But then I noticed white is down a piece! That changes everything. 25.Nxd6 could be met with 25...Bxd6 26.Rxb6 Bxf4 27.Qxf4 axb6 and black may be the one winning.

Another idea was 25.Rxe7 Kxe7 26.Bxd6+ Qxd6 27.Nxd6 Kxd6 and it still looks bad for white. It didn't occur to me to play 26.Nxd6 and I'm still having a hard time visualizing this. But whether white planned this position or not, he is forced to play something "insane" while down a piece and gain the initiative. Maybe black could play 26...Qxb1 giving some material back and possibly helping stem the attack, although he is getting rid of one of the few active pieces.

Feb-22-09  ruinme: I think there are some interesting continuations after move 20... once black plays e4. What if instead of moving the queen, black takes right away? I mean, why doesn't black take right away? Please answer my question ASAP. Thanks.
Feb-22-09  ruinme: I mean, I saw some pretty lines and could see why black could lose if he didn't protect the d6 square he'd be in trouble, I just want another opinion and more lines.
Feb-22-09
Premium Chessgames Member
  johnlspouge: Sunday (Insane):

Vyzmanavin vs Ehlvest, 1986 (25.?)

White to play and win.

Material: Down N+P. The Black Kd8 has 1 legal move, e8, on the file of the White Re1. The White Bf4 reinforces an attack on Pd3, so only the Black Be2 is likely to be able to recapture. The other White Rb1 has a discovered attack on Qb3 after Nb5 moves, and it can reload Re1. The White Qc1 and Bd3 require activation. The White Kg1 is momentarily secure, ironically, because of the Black Pg2.

Candidates (25.): Rxe7, Nxd6, Bxd6

25.Rxe7

Black can decline the sacrifice, but retains only a P to compensate for a K in the center. Moreover, Pf7 and Pd6 cannot both be held. Thus,

25...Kxe7

Candidates (26.): Bxd6+, Nxd6

26.Nxd6 (threatening 27.Qe1+ or 27.Qe3+)

The alternative 26.Bxd6 permits Black to sacrifice Qb6 for a further B+N. White must not let Black close the e-file with …Ne5.

(1) 26…Qxd6 27.Qe1+ Ne5 [else, Black has at least R+N for Q]

28.Bxe5 (threatening 29.d6+ 30.Bxf6)

White recovers the material in the course of a lethal mating attack.

(2) 26…Qa6 [or Qa5] [Qb6-other is no better] 27.Qe3+

27…Ne5 [Kd8 28.Nxf7#] [Kf8 28.Re1 (threatening 29.Qe7+ or 29.Qe8+)]

28.Qxe5+ (threatening 28.Nxf7 or 28.Re1)

Similar to the variations immediately preceding 28.Qxe5, Black is facing a fatal mating attack.

Feb-23-09  DarthStapler: I got the first 3 moves. Also, Ehlvest has left the building
Jul-29-09
Premium Chessgames Member
  Phony Benoni: More like Ehlvest got kicked down the back stairs into the alley.

By the way, the game is actually from the 1984 USSR Championship in Lvov. Neither player participated in the 1986 event.

May-29-12  vinidivici: is it whites 20.Nxb5 is strong? letting blacks e-pawn to fork the knight and the bishop???
Jan-24-21
Premium Chessgames Member
  An Englishman: Good Evening: Good news! Solved the weekend! Bad news! Flubbed Wednesday! C'est la guerre. Will start over on Monday.
Jan-24-21  stacase: I would have moved Last: 26.Bxd6 but then what do I know.
Jan-24-21  Walter Glattke: First comment about that supermarket chess, 25.Rxe7 crashes the Black doll collection for sale, the B- Version could be 25.Nxd6 Qa6 26.Nxf7+ Ke8 27.Nxh8 / 25.Rxe7 Kxe7 26.Nxd6 Qxd6 27.Bxd6+ Kxd6 28.Qf4+ Ke7 29.Re1+Kd8 30.d6 Rb8 31.Be4 Rh7 32.Bc6 a5 33.Bxc6, this line should win, without queen sacfitice white always wins in several ways.
Jan-24-21  Walter Glattke: Puzzle 2: 35.-Rg7 36.f6+ Kh8 or 36.-Ng6 37.Qxg7#
Jan-24-21  Brenin: 25 Rxe7 is begging to be played, and since Black has little choice but to take the R, the question is then whether to capture d6 with the N or B. As <johnispouge> and others explained twelve years ago, 26 Nxd6 is good enough to win. Black can give up his Q (on d6 or, after Qa5, e1) to slow down the attack, but White still has a strong advantage.
Jan-24-21
Premium Chessgames Member
  johnlspouge: @<Patriot>: In reply to your bio’s query, I am still alive and well, just pursuing musical interests instead of chess. I must admit, the <johnlspouge> of 2009 was a superbly methodical chess analyst compared to the <johnlspouge> of 2021. In particular, I remember some chess romantic complaining about the venal material count at the start of my analyses, but sometimes it indicated, as in today’s puzzle, that certain candidates were insufficiently rewarding.
Jan-24-21  lentil: 25. Rxe7 is pretty much instinctual. But then I followed with ... Kxe7 26 Bxd6+ Kd8 27 Bc7+, but that only wins a Q + N for R + N + B, which is not so convincing. After 26 Nxd6, B can reach the same balance by trying ... Qxd6, but maybe the K is too exposed after 27 Bxd6+ Kxd6 28 Qf4+ Ke8 29 Re1+.
Jan-24-21  morfishine: <25.Rxe7> is not that insane

nice attack by white

Jan-24-21  Refused: 25.Rxe7 is the obvious move. The problem starts to get hairy with the right follow up.

25.Rxe7 Kxe7 now how to capture on d6? two candidates, let's start with the straightforward and easier to calculate line.

a) 26.Bxd6+ Qxd6 (virtually forced) 27.Nxd6 Kxd6 28.Qf4+ looks okayish the passed pawn on d5 and the lack of coordination on black's side means that white should be somewhat better, but if black manages to untangle things could get uncomfortable for white.

b) 26.Nxd6 Qa5 (better to keep an eye on e1) 27. Qe3+ Kf8 So far so good. now what? b1) 28.Bxh6+ Rxh6 29.Qxh6+ Kg8~ White should be alright, but I don't like the position that much, that White can't play Re1 here is very annoying. having that said b2) let's play 28.Re1 here first. 28...Kg7 (Bxh6 was a real threat now). 29.Qg3+ ok, this look good. Black has the choice between 29...Kf8 30.Nxc8 (threatening Bd6+) and 29...Kh7 30.Re7 and I fail to see how black can survive this.

Jan-24-21  Refused: <lentil: 25. Rxe7 is pretty much instinctual. But then I followed with ... Kxe7 26 Bxd6+ Kd8 27 Bc7+, but that only wins a Q + N for R + N + B, which is not so convincing. After 26 Nxd6, B can reach the same balance by trying ... Qxd6, but maybe the K is too exposed after 27 Bxd6+ Kxd6 28 Qf4+ Ke8 29 Re1+. >

Nope, that's not the problem.
The problem for black is
26.Nxd6 Qxd6 27.Qe3+ Ne5 28.Bxe5 and this is k.o.

Jan-24-21  RandomVisitor: After 24...Kd8:


click for larger view

Stockfish_21011709_x64_modern:

<49/90 1:24:35 +10.01 25.Rxe7 Kxe7 26.Nxd6 Qd8> 27.Qe3+ Kf8 28.Bxh6+ Rxh6 29.Qxh6+ Ke7 30.Nxc8+ Qxc8 31.Re1+ Kd8 32.d6 Ne8 33.Rxe8+ Kxe8 34.Be4 Nb8 35.Qg5 Qd8

49/97 1:24:35 +2.55 25.Qc3 Rb8 26.Rxe7 Kxe7 27.Qe1+ Kf8 28.Bxd6+ Kg7 29.Bc7 Qa6 30.Bxb8 Nxb8 31.Qg3+ Kh7 32.Qxb8 Qxa2 33.Qf4 Qa5 34.Rd1 Re8 35.Nd6 Re1+

Jan-24-21
Premium Chessgames Member
  chrisowen: Ligament lookout rxe7 garrelous abridge lengthy ain’t arrives at awooga evermore 2 3 it ok javelin ligament jamb footliege reinvest flight file leg leo ork rankquip hup on within as district Vyzmanavin its aether cheffeck reinvest gruffs avid blippawn totadd grubby adagio boffin iota rxe7 count it was edict!
Jan-24-21  mlskdney: knight takes on d6 maybe but this one is too difficult for me
Jan-24-21
Premium Chessgames Member
  agb2002: White is one knight and one pawn down.

After 25.Nxd6 Qxd6 26.Bxd6 Bxd6 White has lost probably the most useful pieces. This suggests 25.Rxe7 Kxe7 26.Qe3+:

A) 26... Kd8 27.Nxd6

A.1) 27... Qa6 28.Nxf7#.

A.2) 27... Rf8 28.Rxb6 axb6 29.Bxh6 Rg8 30.Nxf7+ Kc7 31.Bf4+ Kb7 32.Nd6+ looks winning.

A.3) 27... Qxb1+ 28.Bxb1 Rf8 29.Bxh6 as above.

B) 26... Kf8 27.Bxh6+ Rxh6 (27... Kg8 28.Qg5+ Kh7 29.Qg7#) 28.Qxh6+ Ke7 (28... Kg8 29.Rb2 and Rxg2) 29.Re1+ Ne5 (29... Kd8 30.Qh8+ and mate soon) 30.Rxe5+ dxe5 31.d6+ Kd7 32.Qxf6 looks winning.

C) 26... Ne5 27.Bxe5 dxe5 28.Qxe5+

C.1) 28... Kd7 29.d6 Re8 30.Qxf6 looks very good for White.

C.2) 28... Kf8 29.Nd6

C.2.a) 29... Qa6 30.Qxf6 Rh7 31.Qd8+ Kg7 32.Ne8+ Kg8 33.Nf6+ Kg7 34.Nh5#.

C.2.b) 29... Qa5 30.Qxf6 Rh7 31.Qe5 Ba6 32.f6, with the double threat, Bxh7 and Re1-Qe8+.

C.2.c) 29... Kg7 30.Rxb6 axb6 31.Ne4 wins decisive material.

Jan-24-21
Premium Chessgames Member
  agb2002: I missed 29... Qd8 in my line C.1.
Jan-24-21  Brenin: <agb2002: I missed 29... Qd8 in my line C.1>: 30 Qxf7+ seems give White a win, e.g. 30 ... Re7 31 dxe7+ Qxe7 32 Qd5+ and 33 Qxa8, or 30 ... Kc6 31 Bc2, followed by 32 Ba4 or 32 Qd5+.
Jan-25-21  RandomVisitor: After 26.Nxd6 black does not appear to have a drawing line:


click for larger view

Stockfish_21011709_x64_modern:

<50/93 29:58:50 +10.44 26...Qd8 27.Qe3+ Kf8> 28.Bxh6+ Rxh6 29.Qxh6+ Ke7 30.Nxc8+ Rxc8 31.Re1+ Ne5 32.Rxe5+ Kd6 33.Re1 Rc7 34.Qg7 Rb7 35.Bc2 Kc7 36.Re6 Nd7

50/73 29:58:50 +15.13 26...Rh7 27.Qe3+ Kd8 28.Re1 Kc7 29.Qe7 Rh8 30.Nxf7+ Kb7 31.Nxh8 Nh5 32.Bd6 Qa5 33.Rb1+ Ka6 34.Nf7 Qc3 35.Bxc5 Qf6 36.Qd6+ Qxd6

50/81 29:58:50 +24.76 26...Bb7 27.Rxb6 axb6 28.Nxb7 Ng4 29.Bd6+ Kf6 30.Qe1 Kg7 31.Qg3 Rhe8 32.Qxg4+ Kh8 33.Qh4 f6 34.Qxh6+ Kg8 35.Qg6+ Kh8 36.Qf7 Re1+

49/75 29:58:50 +20.83 26...Qa5 27.Qe3+ Kf8 28.Re1 Kg7 29.Qg3+ Kf8 30.Ne4 Ne8 31.f6 Ne5 32.Bxe5 Bg4 33.Rb1 Rd8 34.Qxg4 Rg8 35.Qf4 Rg6 36.Nd6 Rb8

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