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Ljubomir Ljubojevic vs Georgi Tringov
Lucerne Olympiad (1982), Lucerne SUI, rd 3, Nov-01
Formation: King's Indian Attack (A07)  ·  1-0



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Kibitzer's Corner
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May-09-08  dakgootje: Oh right... I got it more or less... the less-part being I didn't think about the fact black wasn't forced to take the bishop... -_-'

Why is crafty's eval that low btw? For instance after 44. Qc7+ Kf8 45. d6 Qe6 46. Qxh7 Qxd6 47. Qg7+ Ke8 48. h7 black looks dead lost.

May-09-08  johnlspouge: <<whiteshark> wrote: I got 39.Bg8. After 39...Qxg8 it's a rather forced line>

Nice going, <whiteshark>! I looked at the advance d6, but did not calculate accurately enough and thought that the Pd6 was lost. After a superficial computer evaluation, my line trapping the N seems to justify 39.Bg8, but your line is beautifully clean. Thanks!

May-09-08  Avarus: If this hadn't been a problem I wouldn't have thought of 39.Bg8 but since it was, it all became clear. Imo this was easy for friday.
May-09-08  Pianoplayer: I would have never have guessed ♗g8.
May-09-08  znprdx: Yeah well Bg8 is the gold coins move - but I'm always wary about leaving my opponent with a knight...I was too lazy to realize that ultimately White's 'd' pawn will decide the issue as suggested by <Stelling>.

Actually I think there is a very cute continuation with 39.Qb5 which almost works works if Black accepts to exchange queens and after b6 plays Na6, (which isn't really forced) Unfortunately Black would queen the 'a'pawn with check - 39. Qb5 Qx[Q]b5 40. a4x[Q]b5 a4(not forced) 41. b6 Na6 (again not forced - Kd8 holds)42. Bg8 a3 43.Bxh7 a2 44. Bxg6 a1=Q+ BUT IF K already at g2 45.h7 :) Once again the lesson is KEEP IT SIMPLE SILLY

May-09-08  Anatoly21: Man, I was 4/4 until today. Man this was a tricky bugger. Even after knowing the answer I think its hard to see.
May-09-08  dramas79: For a change, I got this one completely. Yay!
May-09-08  jsilver: I got that one. Also, how about 39. Qb5 Qxb5 40. axb5? If after k moves, b6 Na6, then Bc8. Otherwise, with Bg8, white snags the king side pawns.
May-09-08  doglikegroove: This the weirdest week in a long time. I haven't gotten one since Monday, and yet this one I saw right away.

Once your realize black can't really take the bishop, it sort of flows from there.

(Insert obligatory over-the-board comment here, though)

May-09-08  Magic Castle: Well the key move is easy to see. However, as usual I did not calculate all the moves up to its conclusion. Since I am a believer of chess intuition and acting upon educated guesses based on a strategic position or patterns. Taking risks can really be exciting and more rewarding. What I normally do is after figuring and making the key move, without looking at the moves score and just focused on the board, I click the move arrow to see black's reply. Then I figure my reply, then click the move arrow to see if I made the right move. Its like playing "Guess the Move". This way I have improved my game and not fell into time trouble in the majority of my actual games.
Premium Chessgames Member
  benveniste: The first move I tried was 39. ♗g8. The best line for Black I found was.

39. ♗g8 ♕b7
40. ♗xh6 ♔f7

I guess white follows up by pushing the f and g pawns, but is there a more forcing line?

May-09-08  DarthStapler: Didn't get it
May-09-08  MiCrooks: If it were not for this shot, White would be in big trouble! His Bishop though at least in front of the pawns, it going to be inferior to the knight in this endgame, so White must be wary of any queen trades. The fact that Bg8 works is his saving grace! I wonder how far ahead Ljubo saw this coming?
May-09-08  johnlspouge: <<znprdx> wrote: [snip] ultimately White's 'd' pawn will decide the issue as suggested by <Stelling>.>

Yes, thanks to <Stelling>, before <whiteshark>.

All my calculations probably horrified you as usual, <znprdx>, and if so, (much to my unwilling amusement) today I agree. With the resource of the advance d6 in hand, there is no need to notice that Nb4 is probably fatally exposed after acceptance of the sacrifice 39.Bg8.

To win other positions might require <all> their resources, but apparently not today's puzzle.

May-09-08  lopium: I got the first move and that was enough for me.
May-09-08  SickedChess: got it in just 10 seconds! this Friday puzzle was easy :)
Premium Chessgames Member
  kevin86: My choice of Qb5 fails because after the exchange of queens,black can lasso the white pawn with the knight while white's bishop is helpless to stop the black pawn.

In the text,white's bishop becomes a desperato while black's knight is helplessly out of play.

May-09-08  YouRang: Got it! (Somewhat of a relief after missing on Tuesday and Thursday.)

Clearly, this was going to be all about working for a promotion with the h and/or d pawns. The obvious move to threaten promotion is the bishop sac 39.Bg8!, threatening to create a huge promotion threat on the h-file after Bxh7.

Black can stop it with 39...Qxg8, but at the cost of moving his queen (1) where it no longer prevents the white queen from delivering a series of nasty checks & skewer threats, and (2) where it is somewhat trapped in a corner making it all but useless.

I could see far enough ahead to know that white would be able to eat the d6 pawn and start a new batch of promotion & mating threats as his d-pawn starts rolling.

Good puzzle.

Premium Chessgames Member
  ClassZPlaya: This one was way over my head. I might have found it if I could have envisioned the position in whiteshark's nice post after 48. d6, but even after seeing the position it took me some calculation to convince myself that White's position is really winning (for example 48. ... Qf7 49. Qd8+ Qe8 50 Qxf6 is crushing) I must have a blind spot to the multiple checks available in Queen endings. I only considered lines that resulted in trading Queens, tried to find a win with B v N in the resulting positions - most of which were better for Black, couldn't find a win for White and gave up.
May-09-08  ruzon: Did Black blunder with 38...Ke7? Kf8 instead seems to hold things together. Can anyone find a continuation for White?
May-09-08  firebrandx: I keep forgetting to check the main page for these puzzles. Got this one in a matter of a few seconds. Bg8 just looked too tempting to ignore.
May-09-08  wals: Static Evaluation: Material is even. White has a light square Bishop for a Knight. Rooks are off the board.

Dynamic Evaluation: White is well advanced into Black territory and has more space.

Abstract Assessment: Would taking the Queens off the board be to White's advantage? Say Qc8, black must take, bishop takes c8. That leaves black a knight or pawn or king move. Cannot see any of them doing anything worthwhile.
Different track. Bishop goes to g8, if left will take h7. Queen must take. Queen c7+, King moves to f8 Qxd6+
Candidate move= Bg8

39.Bg8 ...Qxg8 40.Qc7+ ...Kf8 41.Qxd6+ ...Kf7


Had the right idea, but not the right moves. Qc8 QxQ BxQ was a no-no, allows the black knight to swing into action and gives black an advantage of more than 2 pawns.

Ljubomir Ljubojevic - Georgi P Tringov, Luzern olm ;BIG 1982

Analysis by Fritz 11: depth 24 time 6min 12

1. (2.14): 39.Bg8 Qb7 40.Bxh7 Kf7 41.f4 exf4 42.gxf4 Na6 43.f5 gxf5 44.Bxf5 Nc5 45.h7 Qb1+ 46.Kg2 Kg7 47.Qe2 Qb8 48.Qg4+ Kh8 49.Qg6 Qf8 50.Kf3 Nd3 51.Ke3 Ne5

2. (1.86): 39.Kh2 Kf8 40.Kg2 Qb7 41.Qc3 Qb8 42.f4 Na6 43.fxe5 Nc5 44.Qxa5 fxe5 45.Qb5 Qb7 46.Qxb7 Nxb7 47.Kf3 Na5 48.Ke3 Nc4+ 49.Ke2 Na5 50.Kd3

(, 10.05.2008)

May-09-08  Jolly Wally: Yeah I got the idea Bg8 pretty quickly and concluded it looked good for white. No deep analysis from me though sorry.
May-09-08  YouRang: <ruzon: Did Black blunder with 38...Ke7? Kf8 instead seems to hold things together. Can anyone find a continuation for White?>

Interesting question. I agree that 38...Kf8 would have been better.

However, I still think black would ultimately lose. He's practically in zugzwang even after Kf8. His queen must hang around b7/b8/d8 to prevent our queen from coming to c8 or c7. His knight must continue to guard c6. His king must stay at f8 to prevent Bg8.

So I'm thinking that white has plenty of time to tighten the screws.

We should start by making a couple defensive adjustments to prevent black's queen from finding counter-checks. First 39.Kg2 (getting off the a7-g1 diagonal) and 40.Qc3 (guarding against incursions at c2 or e3 AND pins the e5 pawn).

As we make these strengthening moves, black can do little but shuffle his queen (say, between b7 and b8).

After this, we might try 41.f4 (diagram). Black can't play ...exf4 due to Qxf6. But black is also in trouble if 42.fxe5.

click for larger view

What can black do?

Premium Chessgames Member
  patzer2: For the Friday May 9, 2008 puzzle solution, White plays the decoy poisoned piece offer 39. Bg8!!

Capturing the decoy Bishop fails, as analyzed by <johnlspouge>. Declining the offer also loses as in the game continuation and in the follow-up line given by <wals> on Fritz 11.

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