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Detlef Neukirch vs Manfred Kalmutzki
Dresden Vdes op (2000), rd 7, Jan-29
Sicilian Defense: Scheveningen. Classical Variation (B84)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
May-28-14  therevolver17: 23.Re6! fxe6 (23..Qd8 24.Rxf6 Qe7) 24.Qxf6+ Ke8 (24..Kg8 25.Qxg5+ Kh8 26.Qf6+ Kg8 27.Rd3) 25.Qxg5 Qf8 (25..Kf8 26.Re1 exf5 27.Qxf5+ Kg8 28.Re6 Qc7 29.Qxd5 Rf8 30.Rg6+ Kh8 31.Qd4+) 4.Re1
May-28-14  therevolver17: Too hard for a Wednesday puzzle
May-28-14  awfulhangover: Strange, but I found this in 5 seconds, faster than most Monday puzzle. Must be easiest Wednesday ever.
May-28-14
Premium Chessgames Member
  patzer2: <Once><Fritzie finds a cunning semi-defence. After 23. Re6, he wants to play 23...Qd8 24. Rxf6 Qe7>

From your diagram above, simply 25. h3 (diagram below)


click for larger view

yields a position where, as you so eloquently state, <White should still win, but it might take a little longer until we dine together in Valhalla...>.

Fritz 12 assesses 25. h3 Rg8 26.c3 Qe4 27.Qf2 Qe5 28.Rb6 Rg5 29.f6 h5 30.Re1 Qg3 31.Qd2 Re8 32.Rxe8+ Kxe8 33.Rxa6 Re5 (+2.53 @ 20/47 depth).

May-28-14
Premium Chessgames Member
  keypusher: I solved this relatively easily because there is basically just one "shot" in the position. Also, White is a piece down, so he needs something big.

It's hard to come up with good puzzles every day.

May-28-14
Premium Chessgames Member
  patzer2: Left Fritz 12 on the assessment of <Once> and Fritz's recommended <23. Re6 Qd8 24. Rxf6 Qe7> and my 25. h3! (diagram above) for an extra hour and a half to 22/49 depth with the following result:

Detlef Neukirch - Manfred Kalmutzki, Dresden Vdes op 2000


click for larger view

Analysis by Fritz 12 (22/49 depth on 2.1 GHZ dual core processor):

1. (2.56): 25...Re8 26.Rxa6 Qe2 27.Rg1 Qe5 28.Qxe5 Rxe5 29.g4 h5 30.f6 Re8 31.Rd6 hxg4 32.Rxg4 Rge5 33.Kg1 Rc8

2. (2.80): 25...Rc8 26.Rxa6 Qe4 27.Qxd5 Qxf5 28.Rc6 Rxc6 29.Qxc6 Kg7 30.Qc3+ f6 31.Kg1 Qe6 32.Rd3 Kg6 33.a3 Qe5 34.Qxe5 Rxe5

3. (2.89): 25...Qe4 26.Qxd5 Qxd5 27.Rxd5 Kg7 28.Rfd6 Rh5 29.Kh2 Rh6 30.Kg3 b4 31.Rxh6 Kxh6 32.Rd7 Kg7 33.Rc7

4. (2.93): 25...Rg8 26.c3 Qe4 27.Qf2 Qe5 28.Rb6 Rg5 29.f6 h6 30.Re1 Qg3 31.Qe2 Kg8 32.Rb7 Rb8

5. (3.19): 25...a5 26.Rb6 Rd8 27.h4 Rg8 28.f6 Qc7 29.Re1 Rg6 30.Qe5 Qxe5 31.Rxe5 Rc8 32.Rxd5 Rg4 33.Rh5 Kg8 34.Rbxb5 Rxc2

6. (3.39): 25...Kg8 26.Qxd5 Qxf6 27.Qxa8+ Kg7 28.Rd8 Kh6 29.g4 Qe5 30.Qxa6+ Kg7 31.Qa8 Qe1+ 32.Kg2 Qe2+ 33.Kg3 Qe1+ 34.Kf4 Qc1+ 35.Ke4 Qe1+

May-28-14
Premium Chessgames Member
  beenthere240: The move Rxe6 has to be seen before 22. Bxg5. It's not as though white is thinking "Gee, I just lost a bishop, what am I going to do about that? Hmm, let me see if I have a countershot."

So I think Once's story should go more like "20...Nd7? That looks funny. How will he protect his d pawn if I simply play Rad1? He'll have to play Nf6. Ah, and then he can put a rook on d8 after which he can advance his knight to e4. What can I do while the knight is on the awkward f6 square, undefended except for the queen?"

So the combo really begins with 21. Rad1. Re6 had to be seen far in advance.

May-28-14
Premium Chessgames Member
  agb2002: White has a pawn for a knight.

Black threatens 23... Rxf5.

The defenseless black rooks and the pawn on f5 invite to play 23.Re6:

A) 23... fxe6 24.Qxf6+

A.1) 24... Ke8 25.Qxg5

A.1.a) 25... exf5 (or 25... e5) 26.Qg8+ Qf8 (26... Kd(e)6 27.Qxa8 + -) 27.Qe6+ Qe7 (27... Kd8 28.Rxd5+ Kc7 29.Rd7+ and mate in two) 28.Qc6+ and 29.Qxa8 + -.

A.1.b) 25... Rd8 26.Qg8+

A.1.b.i) 26... Kd7 27.fxe6+ Kc8 (27... Kc6 28.Qxh7 Qxe6 29.Qa7 + - [2P]; 27... Kc7 28.Qxh7+ + - [3P]; 27... Ke7 28.Qf7#; 27... Qxe6 28.Rxd5+ wins more material) 28.Qf7 + - [2P]. For example, 28... Rf8 29.e7 Rxf7 30.e8=Q+ and 31.Qxf7.

A.1.b.ii) 26... Ke7 27.f6+ Kd7 (27... Kxf6 28.Rf1+ Ke5 (28... Ke7 29.Rf7#) 29.Qg7+ Ke4 30.Qg4+ Ke3 (30... Ke5 31.Qf4#) 31.Re1+ and 32.Qe2#) 28.Qxh7+ + - [2P].

A.1.b.iii) 26... Qf8 27.Qxe6+ Qe7 28.Qxa6 + - [3P].

A.1.c) 25... Rc8 26.Qg8+ Kd7 (26... Qf8 27.Qxe6+ as in A.1.a) 27.fxe6+ Qxe6 (27... Kc7 28.Qxh7+ + - [3P]; 27... Kc6 28.Qxc8+, etc.) 28.Rxd5+ Ke7 29.Qg7+ (29.Qxc8 Qe1#) 29... Ke8 (29... Qf7 30.Rd7+, etc.) 30.Re5 wins.

A.2) 24... Kg8 25.Qxg5+ doesn't look much better than A.1.

B) 23... Rg4 24.Qxf6 (or even 24.Rxd6 Rxd4 25.Rxd4 + - [R+P vs N]) 24... Qf4 25.Re7 Rg7 26.Rde1 with the double threat 27.Rxf7+ Rxf7 28.Qh8# and 27.Ra7 Rc8 28.Qe7+ Kg8 29.Qe8+. If 26... Qg4 27.Re8+ Rxe8 28.Qd6+ and mate in two.

C) 23... Qd8 24.Rxf6 with an extra pawn and the threat 25.Rh6.

May-28-14  Chess Dad: I found Re6 after a few minutes, but wasn't sure it was the best move.

[edit]

And even though I found that move, I'm nearly certain I would not have found the 22. Bxg5 that set it up.

May-28-14
Premium Chessgames Member
  Sally Simpson: Knickers!

You spot Re6 within seconds then spend ages and ages finding the cute shot if Black does not take it.

So you click on the game see an endless stream of moves way passed the critical position where anything could have happended.

Puzzle combo's should play out like clockwork and if sacs are refused then another cute line opens up.

As is it we are now plugging in a computer for..what was it....an hour and a half - send your electricty bill to chessgames.

Knickers.

May-28-14
Premium Chessgames Member
  kevin86: I saw the key move...but didn't understand why . :(
May-28-14
Premium Chessgames Member
  Once: <beenthere240> I think you're right. But I'd rewind the clock even further. For me the action starts here, after 10...Bb7


click for larger view

From this point on, white launches a powerful attack aimed at the uncastled black king.

11. e5 Nd5 12. Nxd5 Bxd5 13. Bxd5 exd5 14. Nf5


click for larger view

White wants to deny black the chance to castle into safety.

14...g6 15. exd6 Bxd6 16. Re1+ Kf8


click for larger view

Mission accomplished. Now the black king can't find a safe haven and the black rooks will find it very hard to connect with each other.

17. Qd4 Rg8 18. Nxd6 Qxd6 19. f5!


click for larger view

I like this move a lot. White threatens the devastating Bh6+ and the annoying Bf4.

19...g5 20. Be3


click for larger view

White is building up some nice pressure against the weak black pawns. This little bishop move allows the Ra1 to add more pressure with Rad1. The bish also stops white from playing Nd7-b6 to protect the d5 pawn.

20...Nd7 21. Rad1 Nf6


click for larger view

We have arrived at the position just before today's POTD position. As we have seen, now white played 22. Bxg5 winning in 18 more moves.

But I guess the reason that CG didn't start from here is that white actually has a stronger move. Instead of 22. Bxg5 he could have played 22. Bd2 setting up the twin threats of Bc4 and Re6.

May-28-14
Premium Chessgames Member
  Once: <Sally> At the risk of passing comment on a lady's knickers...

One of the joys and frustrations of CG POTDs is that they are taken from real games and not composed puzzles. That means that there isn't always a clean kill. Just as in real life, we sometimes have to win ugly because a win is a win is a win.

I suppose it's a bit like the old courtroom dramas on television. Perry Mason, Colombo, that sort of thing. In the last reel the accused man would nearly always break down and confess. That way we would know without a shadow of a doubt that he was guilty. The puzzle would have a neat solution.

But real life isn't always like that. Sometimes we have to contend with messy solutions, ambiguity and ... at the risk of mentioning it in the same post as "knickers" ... shades of grey.

May-28-14  sombreronegro: I knew the knight was holding the position and saw the loose rook, but missed the e6 pawn interference...At least I missed it until with a glance I saw Re6 where it was an of course moment.
May-28-14
Premium Chessgames Member
  Longview: Agree with <ChessDad>. The key to it is the Bxg5 that preceded the set up. That would have been a hard one to find. Going through two sacrifices to pick up comparable pieces and pawns is some kind of vision.
May-28-14
Premium Chessgames Member
  Longview: <Once> great rundown. Like the blow by blow analysis on the attack. Trying to learn how to do that on my own games. Thanks for the example. Also like <Sally Simpson> pointing out the option for black of not taking the rook sacrifice. I can't get my head to reflex that yet. I don't see her cute retort reference though.
May-28-14  Cheapo by the Dozen: White is down a piece for a pawn. Interference with 23 Re6 gets the piece back in a hurry, because the only way to break the rook fork is 23 ... fxe6, and that just allows a queen fork instead. Black's main try is counterthreats, as per:

23 e6 Qc7
24 Qxf6/Rxf6 Qxc2

But that fails badly in the line:

23 Re6 Qc7
24 Qxf6 Qxc2
25 Qe7+ Kg8
26 Qxg5+ Kh8/Kf8
27 R(d))e1

White is a rook ahead, with strong mating threats as well.

May-28-14
Premium Chessgames Member
  Sally Simpson: Hi Once.

"One of the joys and frustrations of CG POTDs is that they are taken from real games and not composed puzzles..."

Which is good and there are millions of actual play combo's to choose from.

It only take half a dozen losses for you discover that one thing you must look at is what happens if your sac is refused (it appears to be a lesson that needs hammmering home - chess is not checkers, captures are not obligatory.)

So I shout "Knickers".

First of all because I do not recognise the names or position.

Second because I see a shot and then nothing else but technique - endgame technique! (why are they doing this to me?)

I want puzzles that I have seen before (so I can rake my memory cells for the answer and I don't have to think...I hate having to think.)

But if I have to think I want them to go sac-sac mate. All forced with no afters to think about.

I hate thinking...I think I mentioned that.

May-28-14  rossvassilev: For once, I guessed it right.
May-28-14  BOSTER: This is the pos. white to play 20.


click for larger view

Move 20.Be3 in the game is too timid to be the best.

Because black Ra8 and Nb8 have awkaward pos. my guess that white should play 20.Bxg5

if Rxg5 21. Qh8+ Rg8 22.Re8+ Kxe8 23. Qxg8 Ke7 24.Re1+ Kf6 , or many other sharp variations.

May-28-14
Premium Chessgames Member
  fm avari viraf: Well, the ostensible 25.Re6 seems to recover the piece with attack but the journey seems to be too long.
May-28-14  Whitehat1963: It took me way too long, but I did find it.
May-28-14  Cheapo by the Dozen: Good point by <Once>. Bd2 looks like it was a better way of leveraging the Re6 opportunity than Bxg5.
May-28-14
Premium Chessgames Member
  gawain: This is a week for quiet moves, apparently. I managed to light upon 23 Re6 fairly quickly.
May-29-14  Herma48852: The first shot of 23. Re6 didn't seem to work so I spent a lot of time seeing if I could deflect the N/f6 to open the a1/h8 diagonal allowing the white queen to mate on h8. But the black R/g5 could just interpose on g8.

Bummer, so back to my original 23. Re6 where I finally saw the interference when black responds with fxe6 opening up the Q fork on f6 picking up the N/f6 and the R/g5. This levels the material but I could not see any further.

I did enjoy the technique white used to finish off black .. very instructive for me.

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