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Ljubomir Ljubojevic vs Jan Hein Donner
Hoogovens (1973), Wijk aan Zee NED, rd 14, Feb-01
Pirc Defense: Austrian Attack. Weiss Variation (B09)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Mar-12-06  ckr: <DuaneTiemann> it looks as though if black protects the pawn with 26.Rf8 it loses to 26...Bc3 27.h6 Bxf6+ if the king recaptures it gets mated if not black loses the rook. I think it still holds water.

Mar-12-06  LIFE Master AJ: Probably the only question left is, "Why didn't Black capture the Queen?" (On his thirtieth move.)

After 30...Qxf6; 31.Re7+ Kg6; 32.Qg3+ Kh5; 33.Rg7, Black must give up his Queen or allow White to play something gnarly. (Like Qh3 mate.)

Mar-12-06  LIFE Master AJ: I got this one - by the way.
Mar-12-06  ckr: <psmith> 28.♕h5 ♕b7 <forced> 29.♘e6+ ♔g8 30.♖d3 <more guns> ♘g7 <or h6> 31.♖g3 <No leaks yet.>
Mar-12-06  LIFE Master AJ: What were Black's mistakes?

15...Qe8!? (Maybe - '?!') in connection with 17...f6?; looked like a really bad idea. And 23...Rf7 was probably better than 27...Re8. (All this was done without computer back-up, so feel free to disagree or check it.)

Mar-12-06  LIFE Master AJ: Many thanks to the person who deleted my earlier post ... I saw absolutely nothing wrong with it.
Mar-12-06  jmelton: al wazir: "Instead of 27...h6, black could have played Qg8. Then the continuation is slightly different: 28. Nxe6+ Qxe6 29. Re1 Qf7 30. Bxf6+ Kg6 31. Re7 Qxf6. Now if 32. Qg3+ then 32...Kh6. White has nothing better than 33. Rxc6, and the win is even harder."

jmelton: 27...Qg7 loses more quickly than the game continuation after 28. Rd7+.

Mar-12-06  myratingstinks: well, I suppose my rating is improving because I actually saw about 3 moves deep into sunday. & horse..... those horsey things trump
Mar-12-06  MindRotorVias: 24.Rxg7 Kxg7 25.Bc3! Rf8 (Re6 Nxf5) 26.Re1 wins for white
Mar-12-06  MindRotorVias: 24.Rxg7 Kxg7 25.Bc3! Rf8 (Re6 Nxf5 gxf5 g4) 26.Re1 and now:

A. 26...Be6 27.Ng5 h6 28.f5
B. 26...Qd8 27.Nxf5 gxf5 28.Nd4
C. 26...Qd7 27.Nxf5 gxf5 28.Qg5+
D. 26...Kg8 27.Re7

Mar-12-06  Fezzik: I got as far as move 30.Bxf6 and stopped.

This was a great Sunday puzzle because there were so many tempting sacrifices that just didn't work. Nxf5 was always in the combinations, but it took me a while to figure out that 24.Rxg7 just doesn't work out. (Maybe Fritz found something I didn't see.)

It took me a bit longer to realise that Black couldn't play 24.Nxf5 Qxf5 because of the simple Rxc7. Once I put those two pieces together, I just had to find out if there were any more forcing moves after material equality was reached on move 30.

Seeing 30.Bxf6 was probably the easiest part! But many chessplayers have not trained themselves to see the board clearly, so that may have been too difficult. Again, this was a great Sunday puzzle, far better than last week's! Keep up the good work!

Mar-12-06  Fezzik: @ckr:

I don't know if you're right about 26.Ng5, but 26.Bc3 was less spectacular and still won. Ljubo reached the position at the board and decided on 26.Bc3.

This is a more forcing move than yours, and it wins. But perhaps your move wins anyway. It's really messy though.

Mar-12-06  akatombo: ckr:

After 26. Ng5, what if 26...h6?

Mar-12-06  Parriotblue: <eqqman> 33...Ne8 34.Qg3+? Why not 34.Rxe8 Rxe8 35.Qf6+ Kh5 36.Qxf5+ Kh4 37.Be1#. But I thought first 30.Qxf6. Why did he play 30...Kg6?
Mar-12-06  dakgootje: Came home after being away the whole weekend, and thought at 10PM, well lets try a sunday puzzle =)

Didnt work out too well, clicked on the puzzle after maybe 1-2 minutes and saw to my surprice that i got the first 5 half-moves =)

Mar-12-06  CapAnson: <Parriotblue> 30...Qxf6 31. Re7! and white wins the queen and knight for the rook after 31...Qxe7 or the queen outright after 31...Kg6 32. Qg3
Mar-12-06  LivBlockade: <DuaneTiemann> After 26...♖f8 (instead of ...♖e6) White {can continue 27.Qg5+ (the f-pawn is pinned) and the f-pawn falls and White's advantage is decisive.

Back to the game. <Why didnt he take the bishop?> I think if 30...♕xf6 (instead of ♔g6) 31. ♖e7+ ♔g6; 32. ♕g3+ ♔h5; 33. ♕f3+ ♔g6; 34. ♖xc7 with many threats including ♖xc6 also looks decisive.

Mar-12-06
Premium Chessgames Member
  kevin86: A great finish by white! Mate is virtually inescapable!
Mar-12-06  MindRotorVias: For the curious, 24.Rxg7! wins as well..

24.Rxg7 Kxg7 25.Bc3! Rf8 (Re6 Nxf5 gxf5 g4) 26.Re1 and now:

A. 26...Be6 27.Ng5 h6 28.f5
B. 26...Qd8 27.Nxf5 gxf5 28.Nd4
C. 26...Qd7 27.Nxf5 gxf5 28.Qg5+
D. 26...Kg8 27.Re7

Mar-13-06  ckr: <akatombo> if 26.h6 ...Bc3

it really doesn't change any thing

then if 27...hxg5 28. Qxg5+ Kh7 29. Qh5+ Kg8 30. Qg6+ Kh8 31. Bxf6#

Mar-14-06  patzer2: For the puzzle solution 24. Nxf5! White initiates a deflection to set up a decoy and a pin to set up a second decisive deflection in 27. Ng5 to remove the guard and win back the exchange with a decisive attack.
Mar-17-06  LIFE Master AJ: <patzer2>
#1.) How did you classify this problem?

# 2.) What do you see as the losing move?

(just curious)

Mar-20-06  ckr: <Fezzik messy?>

[Event "Wijk aan Zee"]
[Site "Wijk aan Zee"]
[Date "1973.??.??"]
[Round "?"]
[White "Ljubojevic Ljubomir (YUG)"]
[Black "Donner Jan-Hein"]
[Result "1-0"]
[ECO "B09"]
[Source "ChessGames.com Sunday March 12,2006"]
[PlyCount "64"]

1. e4 d6
2. d4 Nf6
3. Nc3 g6
4. f4 Bg7
5. Nf3 O-O
6. Bd3 Nc6
7. e5 dxe5
8. dxe5 Nd5
9. Bd2 Ncb4
10. Be4 Nb6
11. a3 Na6
12. Qe2 Nc5
13. O-O-O Nxe4
14. Nxe4 c6
15. Ba5 Qe8
16. Qf2 Nd5
17. Qh4 f6
18. exf6 exf6
19. Rhe1 Bf5
20. Ng3 Qc8
21. c4 b6
22. Bd2 Nc7
23. Re7 Re8
24. Nxf5 gxf5
25. Rxg7+ Kxg7
26. Bc3

( 26.Ng5 fxg5
( 26...h6 27.Bc3 Rh8 28.Bxf6+ Kg8
( 28...Kxf6 29.Nh7+ Kg6 30.Qf6+ Kh5 31.Rd3 Kg4 32.Qg7+ Kh5 33.Rh3# )
29.Bxh8 Qf8 )

27.Bc3+ Kg8

( 27...Kf8 28.Qh6+ Kf7 29.Qf6+ Kg8 30.Qg7# )

( 27...Kf7 28.Qxh7+ Ke6 29.Qg6+ Ke7 30.Qf6# )

( 27...Kg6 28.Qxg5+ Kf7 29.Qf6+ Kg8 30.Qg7# )

( 27...Re5 28.Bxe5+ Kf8 29.Qh6+ Ke8 30.Qxc6+ Ke7 31.Qf6+ Ke8 32.Qh8+ Ke7 33.Qxh7+ Ke8 34.Qg8+ Ke7 35.Qxg5+ Ke8 36.Qg8+ Ke7 37.Qg7+ Ke6 38.Bxc7 )
28.Qxg5+ Kf7 29.Qf6+ Kg8 30.Qg7# )

26. ... Re6
27. Ng5 h6
28. Nxe6+ Qxe6
29. Re1 Qf7
30. Bxf6+ Kg6
31. Re7 Qxc4+
32. Bc3
1-0

Mar-20-06  LIFE Master AJ: I finally looked this game up.

In Informant # 15, it is analyzed by Trifunovich. He gives 17...f6 a full question mark ('?') ... I guess that had to be the losing move.

At one time, Ljubojevic was one easily in the "Top Ten" players in the world. See http://www.chessmetrics.com/CM2/Pla...)

Apr-03-06  patzer2: <LIFE Master AJ> Thanks for encouraging me to take a second look at this one. You caught me blitzing through the puzzles again, making a few quick comments while taking a short break from work.

< #1.) How did you classify this problem?> Initially I only saw it a simple deflection (i.e. removing the guard). However, on reconsideration I classified it as an attack on the weakened castled position, utilizing multiple tactical themes (deflection, decoy, pin, double attack and multiple mating threats).

<# 2.) What do you see as the losing move?> I won't disagree with Informant, but it seems to me that Black starts to get into trouble after 10...Nb6?!, when 10...c6 = would have avoided much of the problems he ran into later. I can see where Informant found 17...f6? ugly for Black, but finding a good improvement is not easy. I suppose 17...b6 18. Bd2 c5 19. Rhe1 Qb5 20. g4 Qc6 21. h3 is better than the game continuation, but White's initiative and space advantage is sufficient to keep Black on the defensive for quite a while.

I realize "weakened castled position" is not a category favored by informant and other modern problem books, but it's an old Reinfeld standby that's been useful for me in trying to research and understand this attacking theme.

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