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Laszlo Szabo vs Cenek Kottnauer
Przepiorka Memorial (1950), Szczawno Zdroj POL
Semi-Slav Defense: Meran. Lundin Variation (D47)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
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Apr-05-20
Premium Chessgames Member
  An Englishman: Good Evening: Much to impossible for me, of course. The even more difficult puzzle consists of this--Kottnauer had walloped Kotov four years earlier in C Kottnauer vs Kotov, 1946 when Kotov played the same defense. One might think that Kottnauer might have played something else.
Apr-05-20  Walter Glattke: Brilliant idea for Qh7, congrats! 19.-Kh8 20.Bxh6 Bf8 wins at least a pawn, or 20.-gxh6 21.Qf5 Nf6 22.Ne5 Nxh7 23.Nxf7+ Kg7 24.Rd3 Rf8 25.h4 Qc7 26.hxg5 Qxg3 27.gxh6+ Kg8 28.fxg3 Rxf7 rather unclear, there are many other moves possible between. 20.Bf5 Nf6 no visible advantage.
Apr-05-20  Brenin: <Walter Glattke>: 20 Bf5 Nf6 21 d6 Bd8 (what else is playable?) 22 d7 or Ne5, with a big advantage.
Apr-05-20  goodevans: I spotted the idea of giving up the B to get the Q to h7 straight away. I looked at 21.Bd7 first but 21...Nxd7 allows the N to get to f6 to defend so it just had to be <21.Bc8>.

I had <24.Nf5> rather than <24.Bxh6>. That, after all, was the main point of 23.Nh4. It seems to win quicker than the game move, e.g. 24.Nf5 Ke8 25.Nxg7+ and now:

25...Kd7 26.Qf5#

25...Kf8 26.Re1 and there's no answer to white's multiple threats (Bxh6, Nf5, etc.)

25...Kf7 26.Re1 is just as bad for black

Apr-05-20
Premium Chessgames Member
  Messiah: Hory fek, this one was very difficult. I need a several hundred ELO points more to solve these in an acceptable time.
Apr-05-20  Walter Glattke: To Brenin, I had 19.-Kh8 20.Bf5 Nf6 21.d6 Bf8 22.Ne5 g5 23.Nxf7+!? Kg7 or 23.d7!? gxf5 seems to become a black counter attack, but 19.-Kh8 is obviously more complicated, so as 19.-Kf8? brings a "stockfishly", computer-like end.
Apr-05-20  RandomVisitor: 14...Qa5 is not good, instead 14...c5 would likely be equal for black.


click for larger view

Stockfish_20040215_x64_modern:

<48/25 06:14 0.00 14...c5 15.Be3 Qc7> 16.Rac1 Rac8 17.h3 h6 18.Nd2 Qb8 19.d5 exd5 20.exd5 Nf6 21.Bxh6 Rfe8 22.Be3 Nxd5 23.Qh5 Nf6 24.Qh4 Ne4 25.Qf4 Bd6 26.Qh4

Apr-05-20  RandomVisitor: After 8.Bd3 black has an equal game:


click for larger view

Stockfish_20040215_x64_modern:

<51/32 57:00 0.00 8...a6 9.e4 c5> 10.e5 cxd4 11.Nxb5 axb5 12.exf6 gxf6 13.0-0 Qb6 14.Qe2 b4 15.Rd1 Bc5 16.a4 bxa3 17.bxa3 Ba6 18.Bb2 0-0 19.Bxh7+ Kxh7 20.Qe4+ Kh8 21.Qh4+ Kg7 22.Qg4+ Kh8

45/72 31:46 +0.05 8...b4 9.Ne4 Bb7 10.Nxf6+ Nxf6 11.0-0 Be7 12.e4 Nd7 13.a3 a5 14.e5 bxa3 15.bxa3 c5 16.dxc5 0-0 17.c6 Bxc6 18.Bxh7+ Kxh7 19.Qc2+ Kg8 20.Qxc6 Rc8 21.Qe4 Nb6 22.h3 Qd5 23.Qg4 Qd3 24.Qg3 Nd5 25.Bg5 Nc3 26.Rfe1 Bxg5 27.Qxg5 Qh7

Apr-05-20
Premium Chessgames Member
  OhioChessFan: Didn't Tal explain saccing a Pawn by answering, "It was in the way."?
Apr-05-20
Premium Chessgames Member
  chrisowen: Bumblebee Boss.
Apr-05-20
Premium Chessgames Member
  chrisowen: And it was buckets?
Apr-05-20  Pyrandus: Szabo (der László)?
Apr-05-20  scormus: Didn't get this. I fancied 21 d6 followed 22 d7, which at least ispla yable. I'll take some solace from the fact that my engine spent 60 s going with d6 as well before "finding" that Bc8 was the best move.

21 Bd7 also came to my mind, but has the drawback allowing 21 ... NxB. The N is now covering g8 so 22 Qh7 isn't threatening mate.

21 Bc8 gives B the painful choice between 22 Qh7 which is stronger because of the mate threat, or losing the LSB. I imagine it came as quite a surprise :O

Apr-05-20
Premium Chessgames Member
  samvega: If you're not Laszlo Szabo, you could just win a humble exchange with 21. Bc7 followed by Be7.
Apr-05-20
Premium Chessgames Member
  takchess: Wrong....it felt like a trap the Queen puzzle.
Apr-05-20
Premium Chessgames Member
  chrisowen: Like a rockstar.
Apr-05-20
Premium Chessgames Member
  agb2002: Black threatens B(N)xd4.

White has Bc8, clearing the queen's path to h7 with tempo, and d6, trying to make the most of the advanced passed pawn.

In the case of 21.d6 Bf6 22.d7 Red8 23.Bc7 wins an exchange but the d-pawn is doomed.

In the case of 21.Bc8:

A) 21... Bxc8 22.Qh7

A.1) 22... f6 23.Bxh6

A.1.a) 23... gxh6 24.Nh4 looks winning (24... Reb8 25.Ng6+ Ke8 26.Qxe7#; 24... Bf5 25.Nxf5 wins).

A.1.b) 23... Rd8 24.Qxg7+ Ke8 25.Re1 Nxd5 (25... Rd7 26.Qg8#) 26.Qg8+ Kd7 27.Qxd5+ wins.

A.2) 22... f5 23.Ne5 (23.Bxh6 Bf6) 23... Bf6 24.Qh8+ Ke7 25.Nc6+ Kd7 26.Qxe8+ Kxe8 27.Nxa5 wins an exchange.

A.3) 22... Bf6 23.Bd6+ and 24.Qh8#.

B) 21... Nxc8 22.Qh7

B.1) 22... Bd6 23.Re1 Rxe1+ 24.Rxe1

B.1.a) 24... f6 25.Qh8+ Kf7 26.Qe8#.

B.1.b) 24... f5 25.Qh8+ Kf7 26.Qe8# Kf6 27.Q(R)e6#.

B.1.c) 24... Ne7 25.Bxd6 looks winning.

B.2) 22... f6 23.Bxh6 gxh6 24.Nh4 Rd8 25.d6

B.2.a) 25... Nxd6 26.Ng6+ Ke8 27.Qxe7#.

B.2.b) 25... Bxd6 26.Ng6+ Ke8 27.Re1+ and mate in two.

B.2.c) 25... Rxd6 26.Rxd6 Bxd6 27.Ng6+ Ke8 27.Qxb7 Nb6 28.Re1+ Kd8 29.Qc6 with the double threat Re8# and Qxd6+.

B.3) 22... f5 23.Be5 Bf6 24.Bxf6 gxf6 25.Qxb7 Nb6 26.Nh4 looks winning.

C) 21... Rc8 22.Qh7 seems to be similar to previous lines.

21.Bc8 looks preferable.

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Apr-05-20
Premium Chessgames Member
  chrisowen: Breakout no?
Apr-05-20  Cheapo by the Dozen: It seemed likely that the solution involved saccing the bishop to unblock the queen, but this particular move to do so never even occured to me.
Apr-05-20  ajile: <samvega: If you're not Laszlo Szabo, you could just win a humble exchange with 21. Bc7 followed by Be7.>

You mean followed by Bd7 correct?

Apr-05-20  ajile:


click for larger view

Analysis by Rybka 3 32-bit :

1. ± (1.31): 21...Bf6 22.Bd7 Kg8 23.Bxe8 Rxe8 24.Re1 Rf8 25.d6 c4 26.Bxb6 Qxb6 27.Qxc4 Bxf3 28.gxf3 Qxd6 29.Rad1 Qb8 30.Re4 a5 31.Qc5 Rd8 32.Rxd8+ Qxd8 33.b3 g6 34.Kg2 Kg7 35.f4

2. +- (1.68): 21...Qb5 22.Ne5 Bd8 23.Bd6+ Be7 24.Be6 fxe6 25.Ng6+ Kg8 26.Nxe7+ Rxe7 27.Bxe7 Nxd5 28.Qxc5 Qa4 29.Bh4 Qa6 30.Bg3 Rc8 31.Qd6 Rc2 32.Qxa6 Bxa6 33.Be5

Apr-05-20  schachfuchs: What a wired line of Stockfish upon 24.Nf5:
24....Qc7 25.Qxg7+ Ke8 26.Qg8+ Kd7 27.Qe6+ Ke8 28.d6 Nxd6 29.Rxd6 Bd5 30.Rxd5 Rxd5 31.Qxd5 Qd8 32.Ng7+ Kf8 33.Ne6+ Ke8 34.Nxd8 Rxd8 35.Qg8+ Kd7 36.Rd1+ Kc6 37.Rxd8 Bxd8 38.Qxd8 +16.4

I think I could not withstand Bxc7 sooner or later ;-)

Apr-05-20  JustAnotherMaster: Damn thought bd7 in 1 second...too lazy
Apr-05-20  dhotts: 21.Be6 is as good as or even better than 21.Bc8 as it keeps the Black knight far away and starts breaking apart the King's defenses. 21.Be6 fxe6 22.Qh7 and Black is hopeless.
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