Apr-23-12
 | | HeMateMe: Instructive, how Short wins with the one pawn advantage in R + P endgame. |
|
| Apr-24-12 | | Nilsson: 69...Ra5?? 69...Rd5! and it is a draw.
/JN |
|
Apr-24-12
| | HeMateMe: After 69...R-d5, 70. R-h7 and white just advances his a file pawn one rank closer to Queening. He can't keep checking white's King, because of the Rook now on the h file. |
|
| Apr-24-12 | | Nilsson: 70.Rh7 Rd8 easy draw . If you don´t believe that, just check with Nalimov Database!
/JN |
|
Apr-24-12
| | HeMateMe: In any case, black can't stop the white king from coming over to assist the pawn to queen. There will be a point where, if a capture is made on a6, the black rook will check on h6, the other side of the board, and pick off the white Rook. I'm not sure this is a theoretical draw, with best play. I think it depends on the position of the Kings, and how far the pawn is advanced. Black seems to have lost earlier, when he gave up a pawn on the h file, with no compensation. Maybe that was done to facilitate trading Queens, but he remained down a pawn for the rest of the game. |
|
| Apr-24-12 | | Nilsson: Next question. How is it possible for the white king to coming over for assist the pawn, with the black rock on d-line?
Here is an address to endgame database. Where you can set up pieces.
http://www.shredderchess.com/online...
/JN |
|
Apr-24-12
| | HeMateMe: Black's King is too far away, that's my point. White can shift his Rook up, one rank at a time, approaching the 8th rank. At some point, he has to put the Rook on the a file, allowing the White King to get closer. Plus, the black King is so far out of the position, that the moment white gets his pawn on the seventh rank, his next move will be a check, moving his Rook from a8 to somewhere else on the back line, which allows him to Queen the pawn. If the black King should somehow get close enough (how, when he has spent all of his moves checking?) he still has to avoid traps such as taking the pawn on a7 with his rook, and then getting skewered because his king is somewhere else on the 7th rank, and white plays R-h7+, picking off the Rook. Perhaps the game was a draw earlier, when black had some counterplay, but he is just a spectator at the end. |
|
| Apr-24-12 | | Jason Frost: More instructive on how not to play a rook endgame by Amonatov. The strategy of bringing the king to h7 or g7 and sitting is correct when the opposing pawn is already advanced to a7, but it's absolutely suicidal otherwise. For example, the following position with black to move is a draw regardless of where the white king is 
click for larger viewSo long as black avoids moving his king off h7 or g7, to avoid the trick with 
click for larger viewRh8!! Rxa7 Rh7+ 
And so long as black checks the white king whenever it gets around the white pawn, and otherwise keeps his own rook on the a file. Whenever the pawn hasn't yet advanced to a7 however, black must either force the advance in some way (without allowing the white rook off the a-file, though there are a lot of draws there as well depending on king position) or essentially beat the white king to the spot, without allowing the aforementioned position with the white pawn on a7 and the black king stuck in no-man's land(e file with black to move or far back from the pawn, d-f file with white to move) Here, 70. Rd5!
click for larger viewWas needed to exploit the useful rook endgame theme of cutting off the opposing king and allowing the black king time to get to the pawn in time. |
|
|
|
|
Kibitzing
