Showing posts with label Straight Back Draws. Show all posts
Showing posts with label Straight Back Draws. Show all posts

Wednesday, October 5, 2011

Endgames: Position Pieces Prior to Pushing Pawns

The most common mistake I see players on the lower boards make in the endgames is pushing pawns  before their pieces are in a position to support the advance.  Sometimes the game does come down to a race between unobstructed pawns, but I think it is much more common that a pawn will need support to advance.  A player should always ask himself whether he needs to improve the position of his pieces before pushing a passed pawn.


This position occurred on 5th Board in the Conant match.  White has an extra passed a-pawn, but all three of Black's pieces are well positioned to oppose its advance.  The only piece supporting the pawn is the White rook, but since it is front of the pawn, it will have to move off the a-file in order for the pawn to reach the queening square at which point the pawn will be completely unprotected.  Since the a-pawn is perfectly secure on its present square, White's first priority should be to get his king and knight involved in the game.  Bringing the knight to c4 via e3 is one obvious plan.


The game eventually reached a king and pawn ending.  The winning technique here is for White to get his king in front of his pawn with 57.Kg5 Kf7 58.Kh6 Kg8 59.Kg6 Kh8 60.g5 Kg8 61.Kh6 Kh8 62.g6 Kg8 63.g7 Kf7 64.Kh7 and the pawn queens.  After 57.g5, which White played, Black should have been able to draw with 57...Kf7 58.Kh5 Kg7 59.g6 as long as he remembered that Straight Back Draws 59...Kg8 60.Kh6 Kh8 61.g7+ Kg8 62.Kg6 stalemate.
 

This endgame occurred on 6th Board against Conant.  It should be a fairly easy win for Black. In an open position with pawns on both sides of the board, the rook is a much stronger piece than the knight. All Black needs to do is to find a square for the rook that maximizes its attacking capabilities.   Any square on the 2nd rank would give the rook many targets. 26...Re1 is a logical way to start.



Unfortunately, Black chose to advance pawns instead. Rooks are much better at attacking than defending. Even after several pawn moves, Black still could have gone on the offensive with 32...Rd2.


In this final position, the Black pawn doesn't need any support, but Black still needs to improve his piece before pushing it.  In the game, Black played 50...b3? and lost after 51.a7 b2 52.a8=Q+ Ke7 53.Qa2.  Black could have won with 50...Kb8! 51.a7+ Ka8 52.c5 b3 53.c6 b2 57.c7 b1=Q+.

Monday, October 26, 2009

The First Rule of Endgames: Straight Back Draws

Here is the first thing every player should know about endgames: in an ending with king and pawn v. king, Straight Back Draws. Consider the following position:

POS. 1

With White to move, he draws if he drops his king straight back to e1 but loses if he drops the king back to f1 or d1. After either 1.Ke1 Kd3 2. Kd1 e2+ 3.Ke1 and 1. Kd1 Kd3 2. Ke1 e2, the following position is reached:

POS 2.

So why does it matter whether White drops straight back or not in POS 1? BECAUSE IT DETERMINES WHOSE MOVE IT IS IN POS 2! If White dropped straight back, it is Black's move and he must abandon his pawn or play 3...Ke3, which is STALEMATE. If White dropped back at an angle than it is his move and he must play 3.Kf2 to which Black responds 3...Kd2 with 4...e1=Q coming next move and checkmate soon thereafter.


While it is only that last drop back that determines whether White draws or not, I recommend that all the drop backs are handled that way. Consider the following position:
POS 3.
It does not matter whether White plays 1.Kd3, 1.Ke3, or 1.Kf3. It only matters that he drops straight back from e2 to e1 at the appointed time. However, I always feel much better when I see one of my players move 1.Ke3 because it gives me confidence that he understands STRAIGHT BACK DRAWS.
Their is an entire body of endgame theory regarding the principle of "opposition" which applies to most endings where only kings and pawns are left and the player who understands it will be able to figure out this position at the board. However, even if a player does not remember the opposition or is too low on time to figure it out, STRAIGHT BACK DRAWS will enable him to save the half point. It will also tell him whether he want to trade off rooks in a position where he has a rook and king against his opponent's pawn, rook and