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Ljubomir Ljubojevic vs Judit Polgar
Melody Amber Blind 3rd (1994) (blindfold), Monte Carlo MNC, rd 6, Apr-??
Sicilian Defense: Alapin Variation. General (B22)  ·  0-1

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 1 OF 2 ·  Later Kibitzing>
Sep-29-04  Jesuitic Calvinist: The key to drawing in this type of ending is of course to get the king into a corner of the opposite colour to the bishop. I think Ljubo missed an opportunity with 84.Kd6, when instead 84.Kf7 takes the king towards the corner he needs.

This was apparently a blindfold game, he may have been short of time and tired, but I still would have expected a player of Ljubo's strength to find this.

Sep-29-04
Premium Chessgames Member
  Eggman: The key to drawing this type of ending? The ending isn't drawn, it's lost. It was just a matter of time, no matter what White did.
Sep-29-04
Premium Chessgames Member
  vonKrolock: <Jesuitic Calvinist> In Ljubo or Judy level - even blindfold - i believe that we cannot speak of some sure drawing methode; one can let the lone King arrive to his desired corner (here a1 or h8) and apply the "Método dos Triângulos de Deletang" (i remember to have learnt it from a brazilian Chess book around 1970, it`s easy and unforgettable) < Re: How do you mate with knight and bishop?

In 1923 the distinguished gentleman chess amateur Daniel Deletang of "Club Argentino" published his method of triangles.
The hypothenuse is formed by the squares of the same color of the bishop and the cathetus are the sides of the chess board.
As the black king must be checkmated in the corner of the same color square of the bishop and facing the board as white, for explanation purposes, the small triangle is f1-h3-h1, the medium triangle is d1-h5-h1 and the big triangle is b1-h7-h1
The white king pushes the black king toward the conjunction of the knight and bishop (the knight controls the squares the bishop can not control) that forms a barrier and drops the black king into the smaller triangle and so until it reaches the corner >
You find this on-line - so far i remember the mate can be forced - from the most difficult position - in around 30 to 35 moves

Sep-29-04
Premium Chessgames Member
  paulalbert: Yes, heading for the opposite color corner just prolongs the agony, but the key is understanding the method to force K to other corner. Ljubo probably played this out against Judit because it was blindfold and maybe time. I have learned how to win this, but whether I could do it blindfolded under a time limit is another matter. < Paul Albert>
Sep-29-04  Jesuitic Calvinist: Yes, prolong the agony - make the player with the B+N work for the win, maybe under pressure he won't be able to find it and the defender might get a draw under the 50 move rule. If you are going to play out a lost ending, you might as well make it as difficult for the opponent as possible.

I was moved to post here after a discussion somewhere else on this site, in which it appeared that many people had no idea about how to win this ending and some seemed to think it is a book draw.

Sep-29-04
Premium Chessgames Member
  technical draw: This can't really be a blindfold game, can it?
Sep-29-04
Premium Chessgames Member
  Sneaky: These tips won't explain how to mate with ♗♘ but it does explain the philosophy behind the procedure:

(1) You herd the enemy king against the edge of the board. This should not be a memorized technique--you just have to use your natural chess skills to be a big bully with your two extra pieces.

(2) Invevitably he runs towards the "safe" corner. (One that is of the opposite color square as your bishop.) You can't stop him from doing this. So you follow him towards the safe corner.

(3) Then you eject him toward the mating corner, preventing his return to the safe corner, keeping him trapped against the edge of the board at all times.

(4) Here's where it gets tricky... at a certain point you have to allow the enemy king to escape the edge of the board!! If you think you can just force the king along the side all the way to his doom, you're wrong--you need to reposition and give him a little leeway in the process. For most players this is very scary--they fear that if the king escapes now they will have to start all over again and miss the 50 move deadline.

But if done correctly the king cannot escape and will be forced back into the corner of doom, and at the very end there is usually more than one way to actually finish the job.

Dec-04-05  avidfan: Position after the sac 24...Rf7xf3 25.g2xf3 up to move 32 is so full of tension, cross-pins and tactics against the queens by bishops on both sides. How can such complexities be visualised for 106 moves! It must be exhausting on the brain.


click for larger view

At move 41 the endgame becomes a battle of white rook against N and B.

At move 83 white gives up rook for the last black pawn yielding an ending where he is mated by N and B at move 106 - a most instructive game.

Mar-14-06  AlexanderMorphy: incredible game considering it was blindfold!
Aug-06-06  vizir: wow
Polgar-is-so-strong
Sep-18-06  amtr: this ended in stalemate
Sep-18-06
Premium Chessgames Member
  paulalbert: If Judit accidentally let this go to stalemate by Bh3 for example, it's too bad because she was perfectly set up for the mate. 105.... Kg3. 106. Kg1 ( only move but attacks N ) Bh3 ( protects N )107. Kh1 ( only move ) Nd2 ( setting up for Nf3+ ) 108. Kg1 ( back again to only square ) Nf3+ 109. Kh1 ( only move ) Bg2#

Playing blindfolded, perhaps she forgot that K was still on f2.

Paul Albert

Jun-21-07
Premium Chessgames Member
  Gilmoy: Um ... <paulalbert> 105..Bf3# :)
Aug-15-07  triangulation: mate can be forced in 33 moves from any position provided the king isn't winning a piece by forking the knight and bishop.
Aug-15-07
Premium Chessgames Member
  paulalbert: <Gilmoy> Just saw your comment from June. You are absolutely right. I was so focused on the mating pattern I use to force the B&N mate that I overlooked that it was immediate mate with a different pattern. Paul Albert
Aug-22-07  Rook in the 7th rank: Does anyone want to learn this endgame exactly? Go to http://en.wikipedia.org/wiki/Bishop...!
Feb-26-08  musicmanTRIBALx: what's with 27. ...d4?
Jun-12-08
Premium Chessgames Member
  Eggman: Thanks for that wikipedia link, <Rook in the 7th rank>.
Oct-18-08
Premium Chessgames Member
  Jonathan Sarfati: <vonKrolock>Here is a video explaining the Deletang three triangle method.

http://www.youtube.com/watch?v=PWZ7...

One chessplaying aquaintance said:

With the [standard] Philidor system I have around a 30% success rate. After viewing this twice, I'm mating fritz every time, its really simple and I could do it at 10 seconds a move with ease.

Oct-19-08
Premium Chessgames Member
  paulalbert: I watched the video. Another interesting pattern to achieve this mate. I use the big W method taught in Tarrasch's Game of Chess. Really easy pattern because the K goes across the board always on 6th rank and N goes in big W,( in case of White B ) F7,E5,D7,C5,B7. B must go to appropriate squares to take squares away from K or tempo moves until K in appropriate colored corner. This is so easy, even I can do this without sight of board. Once you learn an effective method, this mate is not really very hard. Paul Albert
Nov-21-08  withingrace: fun game to watch, that end game was humorous, end educational.
Dec-20-08  WhiteRook48: Why not just play the mate in 1 or did White resign right after Kh1?
Dec-28-08
Premium Chessgames Member
  Jonathan Sarfati: <paulalbert>, I didn't know it was in Tarrasch; has the book been published in English like 300 Chess Games? The method originally came from Philidor -- see a fascimile of his pioneering book "Analyse du jeu des échecs" http://books.google.fr/books?hl=fr&...
Jan-03-09  Kasputin: According to the chessbase site in the Amber Rapid tournament the players do actually see a board - it is a computer screen without pieces. But this article from the NY Times says that the players simply keep track in their heads:

http://gambit.blogs.nytimes.com/200...

I suspect that the chessbase description is the more accurate. Afterall, how do you settle any possible disputes? It would make sense if the moves are actually recorded on a computer - just not have the pieces visible to the players.

But the NY Times article does mention the time control for the blindfold games in the event: 25 minutes per game with a 20 increment each move.

Whether they see a blank chess set on a computer screen or not, this is impressive!

Jan-07-09  WhiteRook48: Why not just play 106...Bf3# right away?
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