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Alexander Tolush vs Vladimir Antoshin
USSR Championship (1956), Leningrad URS , rd 16, Feb-05
Nimzo-Indian Defense: Normal Variation. Schlechter Defense (E52)  ·  0-1

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Apr-15-06  LIFE Master AJ: Its still rather easy for a weekend puzzle.
Apr-15-06  JustAFish: <AJ> Yes, I agree. That I got it is indicative of the fact that it was easy for a weekend puzzle.

I spent about 2 minutes trying to figure out a way to sac a piece in front of the queen on the g-file in order to make way for the mate on g2, but nothing worked. I then noticed the discovered attack on the queen, and looked for a way to make it happen. My first thought was to trade rooks on the first rank, but I noticed that the bishop could interpose. Then taking the bishop on d3 came naturally. All I had to do was count up the material and make sure black was coming out on top in the end. Black was.

Apr-16-06
Premium Chessgames Member
  WannaBe: <Jim Bartle> I've been 'clocked' at approx. 115 words a minute.

Plus I know how to 'hot key' on the keyboard. Those tab key comes in really handy... :)

Apr-20-06  LIFE Master AJ: The key position (problem of the day) was given with Black to play and make his twenty-sixth move ... is that correct?
Apr-27-06
Premium Chessgames Member
  patzer2: Black's decoy pseudo sacrifice 26...Rxd3! is followed by the deflection 27...Re1+ as the initial part of a winning discover attack combination with 28...Ne4+.
Dec-26-12  The Last Straw: 25.♗xd4! ♖xd3 26.♖g4! ♕d7 27.♗xf6 wins for white!
Sep-10-20  saturn2: 26...Rxd3 27. Rxd3 ( Qxd3 Qg2)  Re1+ 28. Kf2 Ne4+ wins the queen
Sep-10-20  Walter Glattke: The queen is unguarded like yesterday, several win ways fails, I found 27.-Rxd3 28.Rxd3 Re1+ 29.Kf2 Ne5+ 30.Kxe1 Qxg6 31.h3 Nf6 black wins 30.Qxe5? Qxe5 31.Rg4 Qe2+ 32.Kg3 Qxd3+ 27.-Rxd3 28.Bxf6 Rxd1+ 29.Kf2 e.g. Qxf6
Sep-10-20
Premium Chessgames Member
  agb2002: Black has a bishop and a knight for the bishop pair and a pawn.

White threatens Bxe3 and Bxf6.

The black queen x-rays the white queen, protected by the bishop on d3. Therefore, 26... Rxd3 27.Rxd3 (27.Qxd3 Qxg2#) 27... Re1+ 28.Kf2 Ne4+ 29.Kxe1 (29.Qxe4 Qxe4 wins) 29... Qxg6 - + [q+n vs 2R+P].

Sep-10-20  Brenin: As yesterday, capturing a hanging Q, rather than checkmating an exposed K, is the key to today's puzzle. White's 26 Bxd4 was a move too late: 25 Bxd4 would have maintained the attack, e.g. 25 ... Rxd3 26 Rg4 (threatening mate on g7) followed by Qxd3. Earlier, Black's 15 ... f6 looked weakening, and 17 Qg6, threatening captures on e4 and h6, appears to refute it; however 17 ... dxe3 refutes the refutation, e.g. 18 Bxe4 Qd1 mate, or 18 Rxe3 Qd4 19 Rb1 fxe5 with advantage.
Sep-10-20  RandomVisitor: 21...Nc3 is a surprising missed win for black:


click for larger view

Stockfish_20090418_x64_modern:
NNUE evaluation using nn-308d71810dff.nnue enabled

<42/67 08:11 -5.25 21...Nc3 22.Rh3 Rd8 23.Re1 dxe3> 24.Rexe3 Rxe3 25.Rxe3 Qd4 26.Bc1 Be4 27.Bxe4 Nxe4 28.Qe2 Nc3 29.Qb2 Qd1+ 30.Kf2 Rd3

Sep-10-20  Brenin: <RandomVisitor>: Yes, one point about 21 ... Nc3 is that the natural response 22 exd4 loses to 22... Qxd4+, followed by 23 ... Qxd3, with back-rank threats to add to White's misery, while 22 Bxc3 dxc3 23 Rh3 Rd8 gives Black overwhelming pressure and initiative.
Sep-10-20  malt: Got 26...R:d3

(26...Q:d3 27.Q:g2# )

27.R:d3 Re1+ 28.Kf2 Ne4+ 29.K:e1 Q:g6

Sep-10-20  mel gibson: I didn't see it.

Stockfish 12 follows the same line:

26... Rxd3

(26. .. Rxd3 (♖e3xd3 ♖d1xd3 ♖e8-e1+ ♔g1-f2 ♘f6-e4+ ♔f2xe1 ♕c6xg6 f4-f5 ♕g6xf5 ♗d4-e3 ♕f5-a5+ ♗e3-d2 ♕a5xa2 ♖d3-d8+ ♔g8-f7 ♖d8-d7+ ♔f7-e8 ♖d7-d3 ♕a2xc4 ♖d3-e3 ♕c4-d4 ♖h4xe4+ ♗b7xe4 g2-g4 ♕d4-a1+ ♔e1-e2 ♕a1-h1 ♗d2-e1 ♕h1xh2+ ♗e1-f2 ♕h2-f4 g4-g5 h6xg5 ♗f2-g3 ♕f4-g4+ ♔e2-e1 ♕g4-e6 ♖e3-e2 ♔e8-f7 ♔e1-f2 ♕e6-g4 ♖e2-e3 a7-a6 ♗g3-c7 b6-b5 ♗c7-g3 ♕g4-f5+ ♔f2-e1 b5-b4 ♔e1-d2 a6-a5) +7.51/35 161)

score for Black +7.51 depth 35

Sep-10-20  TheaN: <26....Rxd3> is the Thursday move, but seeing the motives might not be apparent on move 26. After <27.Rxd3 (Qxd3 Qxg2#) Re1+ 28.Kf2 Ne4+> the point, which reveals a lateral discovered check. It's rather easy to miss this, I lost a rapid game due to a similar capture <29.Kxe1 Qxg6 -+> and converting Q+N vs 2R is relatively easy in this case.

What surprises me most is that this was a <Saturday> puzzle back in 2006. Originally I thought Sunday (someone incorrectly posted Sunday earlier), which would have even be more excessive, but it's still a major difference in relative difficulty. Have we really become that much better over the years?

Sep-10-20
Premium Chessgames Member
  perfidious: Difficult to believe this was once a Sunday POTD.
Sep-10-20
Premium Chessgames Member
  thegoodanarchist: 36. Rg4 was pointless. Why even play it?
Sep-10-20  Brenin: <thegoodanarchist>: My guess is that 36 Rg4 was desperation in time trouble: with time to think, White could reasonably have resigned after 30 ... Nf6, which prevents any counterplay with 31 Rg4. By move 36 White had no reasonable moves: the R on d2 is en prise, and is needed on the second rank to defend the B on f2; 36 Re2 leads to mate by Qh1+, while 36 Rc2 or Rb2 lose a piece after 36 ... Qh1+ 37 Ke2 Nxf2 38 Kxf2 Qg2+, and 36 Rd8+ Kh7 37 Bd4 loses the R on h4 to Qg3+. Presumably 36 Rg4 was intended to protect that R, revive the pressure on g7, and answer Qh1+ with Rg1, overlooking the loss of the R on d2.
Sep-10-20  cormier: 21.Rh4?
Sep-10-20  alexrawlings: I saw the game line up to <28 Kf2> but hadn’t spotted the X-ray attack and winning of the queen after <28.. Ne4+> so can’t award myself the points. Nice tactic!
Sep-10-20  Brenin: <cormier>: I find 21 Rh4 hard to explain. My guess is that White hoped to play Rg4, attacking g7 and defending g2. However, by taking the guard off e3 it allowed 21 ... Nc3!, which Black missed as <RandomVisitor> has pointed out. Solving the problem of e3 with 21 exd4 might have been better now, rather than a move later.
Sep-10-20  petemccabe: I spent a pleasant five minutes looking for a good line. Came up with two candidates, both of which seemed relatively easy. Imagine my surprise to learn that it was black to move, not white. Oh well!
Sep-10-20  Pedro Fernandez: My quick Analysis:

26...Rxd3 27. Rxd3 Qe6 28. Bf2 Qe2 29. Qg3 Ne4 30. Qe3 Nxf2 31. Qxe2 Rxe2 32. Ra3 Nd1 33. h3 Rxg2+


click for larger view

with an easy win for black.

Sep-10-20  Pedro Fernandez: Dear <Chris>, continuous threat of mate destroys white position.
Sep-10-20  messachess: Tricky one!
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