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Mark Danilovich Tseitlin vs Anatoly Abramovich Krutiansky
Leningrad-ch (1971)
Caro-Kann Defense: Panov Attack. Modern Defense (B13)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Nov-08-13  M.Hassan: <Infohunter>:
Thanks. Did not ponder enough to see Black's threat
No credit for tonight and thank you again.
Nov-08-13
Premium Chessgames Member
  Infohunter: <M.Hassan>: Seeing that threatened mate made finding the solution difficult, but doable. As a matter of fact, your choice of move was indeed correct when placed after 22.Bf4. If Black had answered 22.Bf4 with 22...Bxf4 then of course there would have followed 23.Qc5+ Bd6 24.Qxe6#.
Nov-08-13
Premium Chessgames Member
  Infohunter: Oops, I meant 24.Qxd6#.
Nov-08-13  LIFE Master AJ: I spent several minutes on this one.
(Turned into over half an hour!)

I think White is forced to act quickly, Black has threats of mate in four, starting with ...♗x♙/h2+.

I went for 20.Rxe7+! Kxe7▢;
It seems suicidal to play anything else.

< [Or 20...Bxe7; 21.Re1 Rc8; (Box?)

This seems like the only move, Black could not allow the WQ to get to c7.

<(Not 21...Qxf3?; 22.Rxe7+! Kxe7; 23.Qc7+ Ke8; If Black goes <immediately> to f8, then ♕f7 is mate.

24.Bf7+ Kf8; 25.Bb4#.)>

22.Bb4 Qd7; 23.Rxe7+ Qxe7; 24.Bxe7 Kxe7; 25.Qxa6, ]>

21.Re1+ Kf8▢;

< [Once more, playing the Black King out into the open board looks very bad: 21...Kd7; 22.Qa4+ Kc7; 23.Ba5+ Kb8; 24.Qb3+ Kc8; 25.Be6+ " "] <<<<>>>>> >

22.Bf4! " "

Now if Black takes, a check by the WQ on the a3-f8 diagonal will lead to mate.

Of course, Black cannot defend:
< [22...Qd7; 23.Qd5 Rd8; 24.Bxd6+ Qxd6; 25.Qf7#.] <<<<<>>>>> >

Maybe I missed something along the way. The box will probably find an improvement (or two) along the way, it always does.

Nov-08-13  Nick46: I got the first few moves: 20. Rxe7+ Kxe7 21. Re1+ Kf8) but then thought white should play 22. f4 (my defensive nature I guess). Still, getting this far on a Friday is unheard of for me which either indicates the puzzles are getting easier or my chess skills are progressing...
Nov-08-13  gofer: Apart from black's mate threat of <20 ... Bxh2+ 21 Kh1 Bg3+ 22 Kg1 Qh2+ 23 Kf1 Qxf2#> there seems to be nothing much available to black, whereas white has multiple threats. So white needs to react with vigour, but how...?

<20 Rxe7+ ...>

20 ... Kf8 21 Rf7+ mating
20 ... Bxe7 21 Qd5 winning

<20 ... Kxe7>
<21 Re1+ ...>

21 ... Kd7
22 Qa4+ losing the queen for a bishop or mating

<21 ... Kf8>

White still isn't out of the woods yet! White must find a defense against Bxh2+ and Qxh2+

<22 Bf4! ...>

The black king is in a mating net, so although Bd6 is part of an attack it is also a crucial defender! So cannot wander off...

22 ... Bxf4
23 Qc5+ mating

~~~

Okay, so the king hunt is on. I had already seen Qd5 in some variations, but didn't think it was necessary. Even after <22 ... g6> <23 Bxd6+> is more than sufficient to start a king hunt to victory!

Nov-08-13  alkinoos: <infohunter> The line you give in case of 22.Bf4 is completely wrong because 22...Bh2+ is illegal move since Bb4 pins the black bishop on D6.
Nov-08-13
Premium Chessgames Member
  morfishine: In assessing the basic position, Black is set for the combination 20...Bxh2+ 21.Kh1 Bg3+ 22.Kg1 Qh2+ 23.Kf1 Qxf2 mate. Therefore, White must begin his own series of checks to prevent this. White can start checking with either 20.Bb5+ or 20.Rxe7+. After analyzing both, I found 20.Bb5+ to be weaker as the continuations became longer and longer to the point that Black can actually defend himself, thus 20.Rxe7 must be the first move

<20.Rxe7+> 20...Kxe7 (not 20...Bxe7? 21.Qd5 Ra7 22.Qf7+ Kd8 23.Ba5+ Kc8 24.Be6+ and the Black Queen is lost)

21.Re1+Kf8 (best)

But now I went astray with 22.Bb4? missing 22.Bf4! :(

*****

Nov-08-13  Alphastar: I too went with 22. Bb4.

Crafty then gave a hilarious line that ended up in an evaluation of 0.00:

22. Bb4 Qxh2+ 23. Kf1 Qh1+ 24. Ke2 Re8+ 25. Kd3 Qxf3+ 26. Kxd4 Qxf2+ (admittedly black can deviate here) 27. Kd5 with apparently an equal position, since Bxb4 is pretty much forced for black and after that white can force draw by perpetual check.

Nov-08-13
Premium Chessgames Member
  Infohunter: <alkinoos> You are correct: I somehow misread "22.Bb4" as "22.Bb5" in that post.
Nov-08-13  WoodPushkin: Greetings: The critical move here is 22. Bf4. Two ideas come to mind, pin and the less obvious interference. Moving the bishop must happen as checks are pleantiful. I went for the more cautious 22. Bb4 which goes from winning to slightly worse. Of course 22. f4 opens light squares to attack. Its clear Black can open a lasting checking account so this must be avoided. Lesson, see past the easy pin. Calculate the possibilities. Color complex control, here the dark squares associated w/ a3-f8 and h2-b8 must be examined from all angles. JAH Love.
Nov-08-13
Premium Chessgames Member
  agb2002: White has the bishop pair for a bishop and a knight.

Black threatens 20... Bxh2+ and mate in three.

There's no time for moves like 20.Qd5, so how about 20.Rxe7+, removing one defender and diverting the black bishop or exposing the king?:

A) 20... Bxe7 21.Qd5

A.1) 21... Rd8 22.Qf7+ Kd7 23.Re1 + -, with the double threat 24.Be6+ winning the queen and 24.Q(R)xe7+ with a mating attack.

A.2) 21... Rc8 22.Qf7+

A.2.a) 22... Kd7 23.Re1 Rxc4 24.Rxe7+ Kd6 (24... Kc6(8) 25.Qxc4+; 24... Kd8 25.Ba5+ and mate soon) 25.Bf4+ Kc5 26.Rc7+ wins.

A.2.b) 22... Kd8 23.Be6 + -, with the double threat 24.Bxh3 and 24.Ba5+ Rc7 25.Rc1 (23... Qf5 and 23... Qh5 just lose the queen).

A.3) 21... Rb8 22.Qf7+ Kd8 (22... Kd7 23.Re1 as in A.1) 23.Be6 as in A.2.b.

A.4) 21... Ra7 22.Qf7+

A.4.a) 22... Kd7 23.Re1 Kc6 (23... Kd8 24.Ba5+ wins; 23... Kd6 24.Qd5+ Kc7 25.Rxe7+ with a mating attack) 24.Qd5+ Kb6 (to shorten the unavoidable disaster) 25.Ba5#.

A.4.b) 22... Kd8 23.Be6 as in A.2.b.

B) 20... Kxe7 21.Re1+

B.1) 21... Kd7 22.Qa4+ (looks better than 22.Be6+ Qxe6 23.Rxe6 Kxe6)

B.1.a) 22... Kc8 23.Be6+ wins.

B.1.b) 22... Kc7 23.Ba5+ Kb8 (23... Kb7 24.Bd5+ and mate soon) 24.Qb3+ Kc8 (24... Ka7 25.Qb6#) 25.Be6+, etc.

B.1.c) 22... Kd8 23.Ba5+ Bc7 (23... Kc8 24.Be6+) 24.Bxc7+ Kxc7 25.Re7+ with a winning attack (for example: 25... Kd8 26.Qb4 and Black is defenseless against 27.Qd6+; 25... Kd6 26.Qb4+ Kc6 27.Qb7+ Kc5 28.Qd5+ Kb4 29.Rb7+ Ka4 30.Bb3#).

B.2) 21... Kf8 22.Bf4 Qd7 (22... Bxf4 23.Qc5+ Bd6 24.Qxd6#; 22... Be7 23.Qd5 Ke8 24.Qxa8+ or 24.Qf7+ or 24.Rxe7+, etc.) 23.Qd5 Rd8 24.Bxd6+ Qxd6 25.Qf7#.

B.3) 21... Be5 22.Rxe5+ fxe5 (else mate soon) 23.Qxe5+ with a mating attack.

C) 20... Kf8 21.Rf7+ Ke8 (21... Kg8 22.Rxf6+ Qe6 23.Bxe6#) 22.Re1+ Be5 23.Qa4+ Kd8 24.Ba5+ wins.

Nov-08-13  scormus: Instructive puzzle. Not really difficult but it took me a while before I started looking at it in the right way. Bf4 is the natural way to counter the threat on h2. Working backwards, Rxe7+ and Re1+ has to be the way to prepare it.

Nice way to prepare for the weekend :)

Nov-08-13  MiCrooks: Actually the natural way to counter the threat on h2 is f4...nothing "natural" about throwing away your Bishop on f4 and leaving the threat alive. But after Rxe7+ Kxe7 Re1+ Kf8 NOW you are no longer throwing it away for nothing as it is mate in two if the Bishop moves.

The Bb4 line as others have noted doesn't work, and that should be pretty obvious due to the coming Re8+ and the elimination of the Rook from the e-file. There are a number of lines emanating from Bb4 but none are better for White.

Nov-08-13  MiCrooks: Playing back through the game this is a pretty cool, razor's edge sort of game. Obviously here Black to move wins, so the game is that close. If White did not have the resource of Rxe7+ he would be at best even as there is no defense to Black's threat that doesn't allow at least a perpetual. Some of Black's earlier play is not best, but I am sure it was theory at the time. Even Ne7, which is not forced since the Knight isn't really hanging, is still considered best as is Bxf3. But through all of it White holds on to a comfortable edge due to greater King safety and the activity of his pieces.

One cool alternative for Black is Be5 instead of the blunt Qh3. But even here White has many options best is probably Rxe5! sacrificing the exchange in return for an immediate pawn and continuing his pressure on the king. After fxe5 Qxe5 White is much better still.

Nov-08-13  sambo: I didn't think rook takes immediately was best, since bishop takes followed by Qxf3 with checks seems decent for black. I thought 20…Bf4 21 Bxf4 first, followed by the rook sac. I haven't played through this all the way (so many lines!) but am curious if anyone else tried this.
Nov-08-13  Marmot PFL: Typical Panov attack, sometimes after 10 moves the game gets totally crazy and by move 15 both players are in time pressure. Whenever black played dc4 before white moved the king B it seems white gets a strong attack.
Nov-08-13
Premium Chessgames Member
  kevin86: White is in trouble in the puzzle position-so a drastic move is required.

white opens up the position for the long-line pieces and wins quickly.

Nov-08-13
Premium Chessgames Member
  benveniste: Missed the need for ♗f4. No points for me.
Nov-08-13
Premium Chessgames Member
  patzer2: <benveniste: Missed the need for Bf4.> Me too! Friday's first and second moves 20. Rxe7! Kxe7 21. Re1+ were fairly obvious.

However, the obstruction 22. Bf4! is the surprise follow-up move that makes White's attack work.

Nov-08-13
Premium Chessgames Member
  Penguincw: Pretty good for me, as I also got this puzzle (at least the first move). :)
Nov-08-13  Kikoman: 20. Rxe7! and that's it!
Nov-08-13
Premium Chessgames Member
  whiteshark: <Kikoman> He, that's my line!!
Nov-08-13  BOSTER:


click for larger view

This is another ex
where the same motif was decisive. White to play. Bg3.

Nov-08-13  Clodhopper: <benveniste: Missed the need for Bf4. No points for me.>

Ditto. I got to move 22 and all I could come up with was Bb4. This is my chess style - trying to avoid mate when all the while there is a clear when in the position!

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