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Sergei Movsesian vs Mihail Saltaev
Bundesliga (2015/16), Muelheim GER, rd 14, Apr-23
Caro-Kann Defense: Advance. Tal Variation (B12)  ·  1-0

ANALYSIS [x]

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sac: 18.Rd1 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Feb-01-18  diagonalley: wow! ... completely missed this one - (went looking for a more dramatic initial move) ... excellent puzzle!
Feb-01-18  lost in space: No blossoms for me again. Tried to make Bxe6 work but failed.

Nice solution.

Feb-01-18  newzild: I also suspected that 18. Bxe6 was the key, as 18...fxe6 19. Qxe6+ wins quickly, although I couldn't find a win after 18...Qxe4.
Feb-01-18  saturn2: I thought 18 Bxe6 QxNe4 19 Bxf7 Kf8 20 Bg6 threaten8ng Rf7+ is decisive
Feb-01-18  gofer: I want to play <18 Bxe6>, but the sacrifice doesn't have to be accepted. So the that leaves me with a lot of options for black and I have to look at them one by one. In the end, I think the line might be...

<18 Bxe6 ...>

18 ... fxe6?
19 Qxe6+ ...

19 ... Be7 (Ne7 20 Nd6+ +-)
20 Rxe7+ Kf8 (Nxe7 Qxe7# or Kd8 Rd7++ +-)
21 Qxf5+ +-

19 ... Kf8
20 Qxf5+ Kg8
21 Qe6+ Kf8 (Kh7 21 Qh6+! Kg8 22 Qxg7#)
21 Nxd6 mating

<19 ... Qxe4>
<20 Bxf7+ Kf8>
<21 Bg6! ...>

white has set up a windmill of death starting with Rf7+, with so many twists and turns that black has no choice, but to block the a2-g8 diagonal with its queen!

<21 ... Qc4>

Now this is where I get a little stuck. I am pretty sure this is a simple win for white, but finding the sequence is not so clear to me. I think I would try...

22 Qxc4 Nxc4
23 Bxf5

This looks okay!


click for larger view

~~~

Doh!

Feb-01-18
Premium Chessgames Member
  Once: That's clever. Way too clever for me.

The whole point is to clear away the pieces on the back rank and the d file so that White can play Rd8#. To do that, we have to deflect the Black queen, bishop and the rook on a8.

18. Rd1 forces the black queen to move. She may as well snack on the unimportant Ne4 with 18...Qe4

19. Rb8+!


click for larger view

This deflects both the Ra8 and the Bd6:

If 19...Bxb8 20. Rd8#.

If 19...Rxb8 21. Qxb8+ Kd7 22. Qb7+ Ke8 23. Qc8#

If 19...Kd7 20. Qb8#

So we need to rewind for black and look for an improvement. Fritzie recommends 18. Rd1 Qxd1 as the least worst option.

Like most other folk, in human mode I went for 18. Bxe6. Fritzie says that this is okay for white. After 18...Qxe4 19. Bxf7+ Kf8 20. Bg6 we arrive here:


click for larger view

White is a piece down, but as compensation he has a rook on the seventh, the Black king is exposed and it's hard to see how the Rh8 gets going.

Fritzie says +2.13 after a few minutes siliconising. That seems fair. But we still have a lot of work to do as Black tries to get his pieces mobilised.

So, 18. Rd1 is clearly the best move, but black can complicate things with 18...Qxd1. Black is material down but there are still a lot of pieces on the board.

The alternative is 18. Bxe6 which is more complicated but also leads to a comfortable (but smaller) edge for white.

Feb-01-18
Premium Chessgames Member
  Richard Taylor: <TheBish: <areknames: Looked at 18.Rd1 for a while but couldn't make it work so settled for Bxe6 instead...> Same here! I rushed it a little, knowing I wouldn't have a lot of time later, but wish now I hadn't. Missed the whole idea of mating on d8 after giving up the queen on b8! Very nice puzzle, could have easily been a Friday (difficult) one.>

I did the same. I focused on Bxe6. In fact it seems to win but I didn't even see some of the Black replies.

So I give myself a zero for this one!

The actual method was beautiful indeed.

Feb-01-18
Premium Chessgames Member
  Richard Taylor: Why did the e6 square hypnotise me!? I think it is the White Q and B lined up on it...

Looking at it, of course now knowing what happened, that kind of combination is very common. I know that kind and I should have seen it... Such is life.

Feb-01-18
Premium Chessgames Member
  Richard Taylor: <dumbgai: I think 18...Qxd1+ is met by 19. Qxd1 Nxd4 20. Qd3 when the black pieces canít defend one another.>

Yes! That is winning...

Feb-01-18
Premium Chessgames Member
  profK: 5.g4 looks pretty useful! A lot more aggressive than 5a3.
Feb-01-18
Premium Chessgames Member
  Honza Cervenka: Very nice. It resembles me famous game Morphy vs Duke Karl / Count Isouard, 1858
Feb-01-18
Premium Chessgames Member
  agb2002: White has the bishop pair for a bishop, a knight and two pawns.

Black threatens Qxe4, Nxc4 and Qxc4.

White can attack the black king with 18.Bxe6:

A) 18... fxe6 19.Qxe6+

A.1) 19... Kf8 20.Qxf5+

A.1.a) 20... Ke8 21.Qe6+ Kf8 (21... Bxe7 22.Bxe7 wins; 21... Ne7 22.Nxd6+ wins) 22.Nxd6 wins.

A.1.b) 20... Kg8 21.Qe6+ Kf8 (21... Kh7 22.Qh6+ Kg8 23.Qxg7#; 21... Nf7 22.Nxd6 wins) 22.Nxd6 as above.

A.2) 19... Be7 20.Bxe7 wins.

A.3) 19... Ne7 20.Nxd6+ wins.

B) 18... Qxe4 19.Bxf7+ Kf8 (19... Nxf7 20.Qxf7#) 20.Bg6

B.1) 20... Nxg6 21.Qf7#.

B.2) 20... Rb8 21.Rf7+ Kg8 (21... Ke8 22.Qe6+ Be7 23.Rxe7+ wins) 22.Rb7+ and mate soon.

B.3) 20... Qd5 21.Bxf5 Qxb3 22.Rxb3 with even material but White keeps the bishop pair and the better ending.

B.4) 20... Rh6 21.Ra7+ and mate soon.

C) 18... Nf3+ 19.gxf3 only seems to give a piece away.

-----

Another option is 18.Nxd6+ but after 18... Nxd6 19.Re7+ Kf8 (19... Rd8 20.Ra7+ wins decisive material) 20.Bxe6 fxe6 21.Qxe6 Qd5 22.Qg6 Nef7 followed by Qf5, Re8, etc. the attack seems to vanish.

-----

I think I'd play 18.Bxe6.

Feb-01-18
Premium Chessgames Member
  agb2002: Very instructive. I rejected 18.Rd1 because of 18... Qxd1 19.Qxd1 Nxc4 and the black bishop is defended but White has 20.Qd4.

Probably, 18.Bxe6 looked too attractive.

Feb-01-18
Premium Chessgames Member
  malt: First thing I looked at was the weakness at e6 (18.B:e6)
Feb-01-18  morfishine: <Once> True, 19.Rb8+ deflects Black's DSB since this opens the d-file for White's rook.

However, 19.Rb8+ technically does not deflect Black's Queen rook since the forced move to capture on <b8> does not uncover a different vital square for White to exploit (the only squares being uncovered are <a7> & <a6>).

If the position was such that it was fatal for Black to leave either of those squares undefended, then yes, 19.Rb8+ would deflect Black's Queen rook.

*****

Feb-01-18
Premium Chessgames Member
  patzer2: Missed the clever mating threat 18. Rd1! Qxe4 (18...Qxd1+ 19. Qxd1 Nxc4 20. Qd3 +-) 19. Rb8+ Rxb8 (19...Bxb8 20. Rd8#) 20. Qxb8+ Kd7 21. Qb7+ Ke8 22. Qc8#, which is the solution to today's Thursday puzzle.

Instead, I went with 18. Nxd6+ which gives White a clear advantage after 18...Nxd6 (not 18...Qxd6? 19. Bxe6 fxe6 20. Rd1 +-) 19. Rb8+ Kd7 20. Rxh8 Rxh8 21. Be2! Qe4 22. Rd1 ± to +- (+1.61 @ 39 ply, Stockfish 8). Though it probably wins with perfect play, 18. Nxd6 ± to +- is less strong and more complicated than 18. Rd1! +-.

P.S.: Black's decisive mistake appears to be the pawn grab 12...Qxb2?, allowing 13. Nge4 Bxe4 14. Nxe4 Nf5 15. Rb1 Qxd4 16. Rxb7! ± to +- (+2.00 @ 31 ply, Stockfish 8).

Instead, 12...Nf5 offers practical drawing chances as strong play might continue 13. Na4 Qa7 14. Bd3 Nxg3 15. Bxg6 Nxf1 16. Qb3 Be7 17. Qxe6 0-0 18. Qxe7 Qxd4 19. Bxh5 Rae8 20. Rd1 Qxd1 21. Bxd1 Rxe7 22. Bxe7 Nd2 23. Bxf8 Kxf8 24. f4 b5 25. Nc3 Nc4 26. Bf3 c5 27. Bb7 Nxb2 28. Bxa6 b4 29. Nd1 Nb6 ± (+1.20 @ 32 ply, Stockfish 8).

Earlier, the computer indicates Black can improve over 10...Ne7?! 11. Bg5 Qb6 12. 0-0! ⩲ to ± (+0.70 @ 30 ply, Stockfish 8) with 10...c5 11. Bg5 Be7 = to ⩱ (-0.31 @ 30 ply, Stockfish 8).

Feb-01-18  cormier: patzer2: ths ...

Earlier, the computer indicates Black can improve over 10...Ne7?! 11. Bg5 Qb6 12. 0-0! (+0.70 @ 30 ply, Stockfish 8) with 10...c5 11. Bg5 Be7 = (-0.31 @ 30 ply, Stockfish 8).

Feb-01-18
Premium Chessgames Member
  Once: morfishine> Before 19. Rb8+, Black is defending against Rd8# with both the Bd6 and the Ra8. Both are "protecting" b8.

The move 19. Rb8 either deflects the bishop from the d file or the rook from its safe square of a8 to b8 where it can be captured by the white queen.

Two deflections. As I said.

Feb-01-18  takchess: got it 8). There are a large number of Ct-art problems where a bishop points to a back rank square where a rook delivers mate. you may have to throw every piece away before reaching that position. This intuitively felt like one of those once the rook got in position.
Feb-01-18  BOSTER: I did not see well known pattern, I did not see that "d8" is a target , but I saw 18.Rd1 without idea to open "d" file. Maybe we should learn how to make pieces transparent or invisible, or to learn how to read player's mind, and ask self why he put the pieces where they are.
Feb-01-18  Carlos0012358: <agb2002> on your second post I think you meant 20.Qd3. Looks to me like Qd4 would be disastrous for white.

About the puzzle, as <agb2002> pointed out, Bxd6 looks deceitfully attractive. 18.Rd1 is clearly the non-obvious right move.

That said, black's 18......Qxe4 is a blunder, perhaps a death wish. White has a clear advantage and will win but 18.....Qxd1+ will extend substantially black's life.

Feb-01-18  stst: b8 and c/d/e7 are heavily guarded.
Although Nf6+ might have some tempo, more forceful would be 18.Rd1 driving the Q, QxN
19.RxB (remove guard for b8) NxR
20.Rb8+ RxR
21.QxR+ etc should prevail
Feb-01-18  stst: <...Probably, 18.Bxe6 looked too attractive.>

Love in the eyes of the beholder... Bxe6 got refuted right the way by PxB, QxP+ yes, but right from start, e7 is heavily guarded, by Black's B & N, so ... even by brute, Rxe7 B/N x R, etc... it should be way below Movessian, quite a tough player...

Feb-01-18
Premium Chessgames Member
  Jimfromprovidence: In the sequence 18 Rd1 Qxd1+ 19. Qxd1 Nxc4 it takes some processing to trust that 20. Qd3, below, evokes no good counter play.


click for larger view

For example, if black tries 20...Ne5, below, attacking the queen...


click for larger view

...then white wins with 21 Nxd6+ Kf8 (if 21...Nxd6 then 22 Qxd6 with forced mate follows) 22 Qe1, or even better with 22 Qxa6!, below.


click for larger view

Feb-02-18
Premium Chessgames Member
  agb2002: <Carlos0012358> Yes, you're right.

<Jim> also considers Qd3.

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