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Ingi Johannsson vs Nikolay Minev
Halle Zonal (1963), Halle GDR, Jul-??
Zukertort Opening: Symmetrical Variation (A04)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Mar-05-05  rochade18: Wow, that's a quite deep combination beginning with Nf7+!
Mar-05-05  hintza: Black could have avoided the combination with, for example, 23...Nxe5. If White recaptures with the bishop he gets a fine position, but Black is not immediately lost as in the game. One line is 23...Nxe5 24.Bxe5 f4 25.Bd5+ Kh8 26.Bxf4 and White is much better.

Recapturing with the rook instead gives Black much better chances of survival: 23...Nxe5 24.Rxe5 f4 25.Bxb7 Bxd3 26.Qxc3 Ba5 27.Rxe8 Bxc3 28.Rxd8 Rxd8 29.Bxc3 Bxb1 30.Bxa6 is quite even, although there may be some improvements for White in this line.

Feb-13-07  beenthere240: The position after 26....Bxd3 is in a puzzle book I own (It's your move, by Teschner). Unfortunately, the position in the book omits white's bishop on f7, making the problem much more difficult!
Feb-13-07  beenthere240: 29....Kh8 loses after 30. Bd4+ Kh7 31 Be4+ when white is up a rook.
Aug-17-13  agb2002: The material is identical.

Black threatens 24... Nxe5, weakening d3.

The first idea that comes to mind is 24.Bd5+ Kh8 25.Nf7+ Rxf7 26.Bxf7

A) 26... Nd6 27.Rbe1

A.1) 27... Nxf7 28.Re8+ Bg8 29.Rxd8 + -.

A.2) 27... Nd4 28.Bxd4 cxd4 29.Re8+ Nxe8 30.Rxe8+ Qxe8 31.Bxe8 + -.

B) 26... Nf6 27.Bxf6 Qxf6 28.Re8+ Bg8 29.Rxg8+ Kh7 30.d4+ g6 31.Rxg6 Qxf7 32.Rxc6+ and 33.Rcxb6 + -.

C) 26... Nc7 27.Rbe1

C.1) 27... Qxd3 28.Re8+ Bg8 29.Rxg8+ Kh7 30.Qxd3+, etc.

C.2) 27... Bxd3 28.Qc3 Qd4 (28... Nd4 29.Qxd3) 29.Re8+ Nxe8 30.Rxe8+ Kh7 31.Bg8+ Kg6 (31... Kh8 32.Bd5+ Kh7 33.Qc1 traps the black queen) 32.Re6+ Kf(h)5 (32... Kg5 33.Nf3+ and 34.Nxd4) 33.g4+ followed by 34.Nf3+ and 35.Nxd4, etc.

C.3) 27... Nd4 28.Bxd4 as in A.2.

C.4) 27... Ra8 28.Re8+ Nxe8 29.Rxe8+ Qxe8 30.Bxe8 Rxe8 31.gxf4 and White should win.

Aug-17-13
Premium Chessgames Member
  An Englishman: Good Evening: White's position looks so bad that at first I thought the assignment was Black To Move. You really have to see at least the first four moves to claim credit, and I was Not. Even. Close.
Aug-17-13
Premium Chessgames Member
  al wazir: The first three moves are obvious and don't cost white any material (after 26...Bxd3 he can always fall back on 27. Rxe8+ Qxe8 28. Bxe8 Bxc2 29. Rc1). I didn't see that 27. Qxd3 works before peeking and I don't think I would have seen it OTB even after 26...Bxd3.
Aug-17-13  morfishine: Looks like Ivanchuk vs Ivanchuk

A Unique position noted for Black's passive DSB & QR. In any case, I almost got the whole line:

24.Bd5+ Kh8 25.Nf7+ Rxf7 26.Bxf7 Bxd3 27.Qxd3 Qxd3 28.Rxe8+ Kh7 29.Bg8+ Kg6 30.Re6+ Kf5 31.g4+ Kg5 32.Ne4+ Kh4 33.Bxg7


click for larger view

**********
PM: I didn't see 33...h5 in my line

**********

Aug-17-13  Nick46: <al wazir: The first three moves are obvious..> Those were the ones I got, which is good going for me this far into the week.
Aug-17-13  Nick46: Will tomorrow be the third Nikolay in a row bombing out with black?
Aug-17-13  paramount: very nice puzzle. very deep!!
Aug-17-13  kevin86: Black's king is chased into the open after the queen is sac-ed.The king is left alone...to be mated.
Aug-17-13  cyclon: In Today's Puzzle my solution is ; 24. Bd5+ Kh8 25. Nf7+ Rxf7 26. Bxf7 and NOW ;

1. -26. -Bxd3 27. Qxd3 Qxd3 ( practically forced ) 28. Rxe8+ Kh7 29. Bg8+ Kg6 ( or 29. -Kh8 30. Bd5+ Kh7 31. Be4+ wins a whole Rook ) 30. Re6+ Kh5 ( or 30. -Kf5 31. Bh7+ Kxe6 32. Bxd3 wins a piece and 30. -Kg5 31. Ne4+ Black has to play 31. -Qxe4 32. Rxe4 White's Rook ahead ) 31. Bf7+ g6 32. Bxg6+ Qxg6 ( 32. -Kg5 33. Ne4+ similarly as in previous ) 33. g4+ Kg5 34. h4+ wins.

2. -26. -Nc7 White can play simply f.e. 27. Ne4 being healthy exchange up.

3. -26. -Nd6 27. Rae1 and White's intending 28. Re8+ winning material and attacking. -27. -Nd4 28. Bxd4 cxd4 29. Re8+ wins, or -27. -Nxf7 28. Re8+ and move like -27. -Qg5 gets 28. Re8+ Nxe8 29. Rxe8+ Bg8 30. Rxg8+ Kh7 31. d4+ wins outright.

4. -26. - Ne7 27. Rae1 ( I prefer this move over 27. Qc3 which nevertheless seems plausible ) -27. -Bxd3 ( what else? ) 28. Rxe7 Nf6 ( 28. -Bxc2 29. Rxe8+ and 28. -Qxe7 29. Rxe7 both wins a piece for White ) 29. Qc3 and if Black plays f.e. -29. -Ba5, comes 30. Re8+ and either -30. -Nxe8 31. Rxe8+ mates, or -30. -Kh7 31. Rxd8 winning too much material.

5. other inferior lines are -26. -Nf6 27. Bxf6 Bxd3 28. Bxd8 winning a Rook, or -26. -Nd4 simply 27. Bxd4 threatening again 28. Rxe8+.

These are some illustrations why it seems to me that Black gets a losing game after 24. Bd5+ Kh8 25. Nf7+ Rxf7 26. Bxf7 by force - but, there might be something else....

Black's problems were caused mainly in disposition of his Queen-side pieces. Let's see.

Aug-17-13
Premium Chessgames Member
  Jimfromprovidence: <agb2002> <24.Bd5+ Kh8 25.Nf7+ Rxf7 26.Bxf7 Nc7 27.Rbe1>

I could not find the answer to 26...Nc7. 27 Rbe1 is very nice.


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Notwithstanding you winning line, at first 27...Bxd3 looks good here for black, but white just avoids it with 28 Qc3.


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Aug-17-13  patzer2: I missed today's puzzle solution 24. Bd5+!! (going instead for 24. Be4 which only leads to equality with strong play by Black) because I saw 26...Bxd3 leads to only a level position after 27. Rxf8+ Qxf8 28. Qxd3 =.

What I missed was 26...Bxd3 27. Qxd3!! Qxd3 28. Rxe8+ Kh7 29. Bg8+ Kg6 30. Re6+ gives White a winning pursuit (i.e. king hunt) combination.

In the final position, Black has nothing better than 31...Qxe4 32. Rxe4, leaving White a piece up with an easy win.

If 31...Kf5, then 32. g4#.

If 31...Kh4, then 32. Bf7+ g6 33. Bxg6#.

P.S.: It's not clearly decisive like 24. Bd5+!!, but the simple idea 24. Bxc6!? bxc6 25. g5! leaves Black a weak pawn structure and gives White a solid advantage with winning chances.

Aug-17-13  patzer2: <morfishine> After 30...Kf5, your 31. g4+ idea with accurate calculation leads to a winning, but somewhat difficult, King hunt mating attack.

However, after 30...Kf5 simply 31. Bh7+!
(position below)


click for larger view

skewers the White King and leaves White a piece up and with an easy win after 31...Kxe6 32. Bxd3 .

P.S.: I like 30...Kf5 31. Bh7+, not because it's the strongest winning line, but because it shortens the amount of calculation required in a long and difficult combination, especially early on after 24. Bd5+!!.

Aug-17-13  agb2002: <Jimfromprovidence: ...

Notwithstanding you winning line, at first 27...Bxd3 looks good here for black, but white just avoids it with 28 Qc3.>

What I don't understand is why I considered Bxd3 at move 27th, after 26... Nc7, but I overlooked it at move 26th.

Aug-17-13
Premium Chessgames Member
  Jimfromprovidence: <agb2002> <What I don't understand is why I considered Bxd3 at move 27th, after 26... Nc7, but I overlooked it at move 26th.>

I overlooked the fact that you had already analyzed the 26...Nc7 27 Rbe1 line as well as the 26...Nc7 27 Rbe1 Ra8 one.

I noticed that that there is no win after 26...Nc7 27 Rbe1 28 Qxd3? below, as compared to the text.


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This is the text position after 27 Qxd3.


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White will have had to give up one of his rooks in the alternative position in the first diagram to get to the same point as 31 Ne4+ in the text, so black can afford to give up his queen for the knight and remain more or less even.

Aug-17-13  morfishine: <patzer2> Thanks for looking! This is a good example of the difficulties in visualization: After 31.Bh7+, all I saw was my rook was now not protected; I didn't see the Queen skewer at all!

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