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Lev Polugaevsky vs Boris Gulko
"Lev and Let Die" (game of the day Mar-16-2006)
43rd USSR Championship (1975), Yerevan ARM, rd 12, Dec-??
English Opening: Anglo-Indian Defense. Queens Indian Variation (A17)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 4 OF 4 ·  Later Kibitzing>
Mar-16-06  EmperorAtahualpa: This last move 28.Nd6 is truly beautiful. I don't mind that this game served as a puzzle only a few days ago. Now we can worship 28.Nd6 some more. :)
Mar-16-06
Premium Chessgames Member
  kevin86: Why the rerun? It was a fine puzzle-and the pun fit,so that's the reason.

I really enjoyed the irony of black's dark bishop. It was a BAD bishop all game,but right after it was exchanged,it became indespensable-lol

Mar-16-06  schnarre: Hmmnnnn....wonder if there's any Guns n' Roses fans on this site.....
Mar-16-06  Jim Bartle: Just have some Patience...
Mar-16-06  Nostalgia: <schnarre: Hmmnnnn....wonder if there's any Guns n' Roses fans on this site....> I'm sure there are some Beatles fans, too ;)

-Joe

Mar-16-06  McCool: This looks familiar. Hmmmmm..
Sep-10-19  Cheapo by the Dozen: Cute one. I spent some time trying to make 28 Ng5 work, but in fact it fails miserably to 28 ... Qxf6. So that's the defense to prevent. It can't be prevented by maintaining coverage of the pawn, if White hopes to attack, so it needs to be prevented via tempo instead.

29 Nd6 fits the bill, in a kind of clearance sacrfice. Since it forks queen and rook, the only possible defense is 29 ... cxd6. Now White plays 30 Rxe6 threatening a couple of checkmates, and Black can't prevent both mates with a single defensive move.

Sep-10-19
Premium Chessgames Member
  FSR: I had the same solving experience as <Cheapo by the Dozen>.
Sep-10-19
Premium Chessgames Member
  agb2002: The rook x-rays the black knight. This suggests 28.Nd6:

A) 28... cxd6 29.Rxe6 and mate in two.

B) 28... Qxf6 29.Nxe8 Qe7 (29... Qd8 30.Rxe6 and mate next; 29... Qxh4 30.Rxe6 wins) 30.Ng7 ends up a rook ahead.

C) 28... Qa5 29.Rxe6 and mate soon.

Sep-10-19
Premium Chessgames Member
  Jimfromprovidence: After 28 Nd6, if 28...Qxf6 is black's response, then after 29 Nxe8, you have to respond to 29...Qe7, below.


click for larger view

One cute way to protect/offset the attacked knight is with 30 Qg7+! So after 30...Nxg7 31 Rxe7, below, white should be happy giving up his knight for black's queenside pawns.


click for larger view

Sep-10-19  newzild: <jimfromprovidence> Nice.

Additionally, White can play the simple 30. Rxe6 fxe6 31. Qxg6+ Kf8 32. Nf6.

Sep-10-19  saturn2: After 28. Nd6 there is

28...cxd6 29. Rxe6 or

28...Qxf6 29. Nxe8 

Sep-10-19
Premium Chessgames Member
  malt: Have 28.Nd6 Q:f6 29.N:e8
Sep-10-19  charlesdecharemboul: Bad pun just as the title of the movie!
Sep-10-19  zb2cr: 28. Nd6 with fork seems to do the job.
Sep-10-19
Premium Chessgames Member
  gawain: I jumped, wrongly, to the conclusion that the knight jump to 28 Ng5 would work.
Sep-10-19  King.Arthur.Brazil: <Jimfromprovidence> For the continuation 29...♕e7 other possibility could be 30.f4 ♕xe8 31.f5 ♕f8 32.♕xf8+ ♘xf8 33.fxg6 fxg6 34.♖e7 c5 35.♖xa7... which is not better than yours... therefore, I agree with the answer 30.♕g7+ , because White earns 2♙ (instead of 1).
Sep-10-19  King.Arthur.Brazil: <Newzild For the sequence {28...Qxf6 29.Nxe8 Qe7 30.Rxe6 fxe6 31.Qxg6+ Kf8
32.Nf6>
Qf7 (forced), then 33.♕h6+ with ♕g7 34.♕xg7+ ♔xg7 35.♘e8+ ♔f7 36.♘xc7 ... For {33...Ke7 34.Nxh5 and White can exchange the ♕, keep the earned ♘ and win position. Seems even more quick.
Sep-10-19  RandomVisitor: Black got into trouble at move 22. Better just to kill the pawn early, before it can advance and cause problems.


click for larger view

Stockfish_19082608_x64_modern:

<38/50 04:48 0.00 22. ... Nxe5 23.Nxd4 Rd6> 24.Qe2 Bg7 25.f4 f5 26.Nxf5 gxf5 27.fxe5 Rde6 28.Re3 Qd4 29.Qxh5 Rxe5 30.Qf3 Rxe3 31.Rxe3 Rxe3 32.Bxe3 Qxd3 33.Qg3 Kh7 34.Qf4 c5 35.Kf2 b5 36.h5 a5 37.Qc7 Qc2+ 38.Kg3 Qe4 39.Bxc5 Qe1+ 40.Bf2 Qe5+ 41.Qxe5 Bxe5+ 42.Kf3 Bxb2 43.Bc5 Be5 44.g4 fxg4+ 45.Kxg4 b4 46.axb4 axb4

38/67 04:48 +1.71 22. ... Bg7 23.Bf6 Bxf6 24.exf6 Qf5 25.Qg5 Rxe4 26.dxe4 Qxg5 27.hxg5 d3 28.Rd1 Rxe4 29.Rxd3 Re8 30.Rc3 Re6 31.b4 a6 32.a4 Ne5 33.Rxc7 Nxf3+ 34.gxf3 Re5 35.f4 Re4 36.Rc8+ Kh7 37.Rf8 Rxb4 38.Rxf7+ Kg8 39.Rg7+ Kf8 40.f5 Rg4+ 41.Kh2 Rxg5 42.fxg6 Rf5 43.Rf7+ Kg8 44.Kh3 Rf4 45.f3 Rxf3+ 46.Kh4 Rf5 47.Ra7 Rxf6 48.Kg5 Rd6 49.Kxh5 Rd4 50.Rxa6 Kg7 51.Ra7+ Kf8 52.Kh6 Rh4+ 53.Kg5

38/66 04:48 +2.18 22. ... Qa5 23.Qxa5 bxa5 24.Bf6 Rb8 25.R1e2 Bg7 26.Bxg7 Kxg7 27.Nxd4 Nxd4 28.Rxd4 Kf8 29.Rd5 Reb6 30.Rxa5 Rxb2 31.Rxb2 Rxb2 32.Rxa7 Rc2 33.Ra4 Rc1+ 34.Kh2 Rc3 35.d4 Ke7 36.d5 Rd3 37.Ra5 f6 38.e6 Kd6 39.a4 Rd4 40.g3 g5 41.hxg5 fxg5 42.Kg2 g4 43.f4 Rd2+ 44.Kf1 Rd3 45.Kf2 Rf3+ 46.Kg2

Sep-10-19  RandomVisitor: After 27...Ne6


click for larger view

Stockfish_19082608_x64_modern:

<44/60 32:44 +9.39 28.Nd6 Qxf6 29.Nxe8 Qf4 30.Qxf4 Nxf4 31.Nxc7> a5 32.Re4 Nxd3 33.Rxd4 Nc1 34.Rd6 Kf8 35.Rxb6 a4 36.Nd5 Nd3 37.Rb8+ Kg7 38.Rb5 Nc1 39.Rb6 Nd3 40.Kf1 Kf8 41.Rb8+ Kg7 42.Rb7 Kf8 43.Ke2 Ne5 44.Rb4 Nc6 45.Rxa4 Ne5 46.g3 Kg7 47.Re4 Ng4 48.Re7 Nf6 49.Nxf6 Kxf6 50.Ra7 Ke6 51.Ra6+ Kd5 52.Kf1 Kc4 53.Rf6 Kb3 54.Rxf7 Kxb2

44/79 32:44 +8.32 28.g3 Rb8 29.Ng5 Qxf6 30.Qh7+ Kf8 31.Rxe6 Qg7 32.Qxg7+ Kxg7 33.Re7 Rc8 34.Rxf7+ Kg8 35.b4 a6 36.Rf6 c5 37.Rxg6+ Kf8 38.Rxb6 c4 39.dxc4 Rxc4 40.Rxa6 Ke7 41.Ra7+ Kd6 42.Ne4+ Kd5 43.Nf6+ Ke6 44.Ra6+ Kf5 45.Nxh5 d3 46.Kg2 Ke5 47.Nf4 d2 48.Re6+ Kd4 49.Rd6+ Kc3 50.Nd5+ Kb2 51.Ne3 Rc8 52.Rd3 d1R 53.Rxd1 Kxa3 54.Nd5 Rh8 55.b5 Ka4 56.b6 Kb3 57.Rd3+ Kc4

44/103 32:44 +7.70 28.g4 Qf3 29.g5 Rd8 30.Ng3 Rd7 31.Rxe6 fxe6 32.Qxg6+ Kf8 33.Qh6+ Kg8 34.Nxh5 Qd1+ 35.Kh2 Qf3 36.Ng3 Rf7 37.Ne4 Qf4+ 38.Kg2 Qg4+ 39.Ng3 Qf4 40.Qg6+ Kf8 41.Qh5 Rxf6 42.Qh8+ Ke7 43.gxf6+ Qxf6 44.Qc8 Qf4 45.h5 a5 46.h6 Qxh6 47.Qxc7+ Kf8 48.Qxb6 Qg6 49.Qxd4 Qg5 50.Kf3 Ke8 51.Ne4 Qd5 52.Qc3 Kd7 53.Ke2 Kd8 54.Ke3 e5 55.Ke2 a4 56.Qb4 Kc7 57.Qxa4 Kd8 58.Qa7 Qb3 59.a4 Qxb2+ 60.Kf3

Sep-10-19
Premium Chessgames Member
  patzer2: <RandomVisitor> Thanks for the deep Stockfish analysis of today's Tuesday puzzle solution 28. Nd6! +-.

As you note, Black's game goes bad after 22...Bg7? 23. Bf6! ± to +- (+1.63 @ 30 ply, Stockfish 10).

The correct move, as your deep computer analysis indicates, is 22...Nxe5 =.

Even though 22...Bg7? 23. Bg6 ! ± to +- left Black in really bad shape, from the practical perspective of playing against a human instead of a computer, it may not have been the decisive error.

From a human player perspective, the clearly decisive mistake appears to be 25...Rxe4?, allowing 26. Nxe4 + - (+3.07 @ 41 ply, Stockfish 10).

Instead, 25...Re5 26. Rxe5 Rxe5 27. Ne4 Nd8 28. Qc1 ± (+1.46 @ 40 ply, Stockfish 10) appears to offer Black practical drawing chances, especially against a human opponent.

Sep-10-19  TheaN: I thought the sequence 28.Nd6 Qxf6 29.Nxe8 Qe7 30.Qg7+?! (to ! perhaps) Nxg7 31.Rxe7 +- would be easy curtains as White goes up the rook, but exactly at that position I missed 31....Kf8 which picks up (at least) the knight. Yes, White's clearly won after 32.Rxc7 and Rxa7 but it's still an exchange only and White has some work left. I still think it's the easiest <practical> win.

The alternative after move 29 is 30.Rxe6! (objectively better) fxe6 31.Qxg6+ Kf8 32.Nf6 +- where White has an additional piece instead of the exchange. Problem, queens on the board and any upcoming trade may put the knight in a somewhat awkward position. Typically in these semi-closed positions I might even prefer an exchange over a full piece (especially if it involves bishops): the rook just slices through the position with the threat at any time to give the exchange back with a won pawn endgame.

Sep-10-19  scormus: I had the same experience as <FSR> !

<gawain> as you know, Knights don't always make the moves that you expect ...... Green or not ;)

Sep-10-19
Premium Chessgames Member
  playground player: I thought Ng5 worked. What was I missing?
Sep-10-19  samiam7458: After 28.Nd6 Qxf6 29.Nxe8 Qe7, 30.Ng7 leaves white up the full rook.
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