Ask a guy who understands KR vs. KP endings anything

Sort:
strikingtan

This was so difficult to grasp the first time around. I don't think it's possible...but after a couple of revisions, the ideas connect and everything becomes lucid.

 

So, anyways, shoot. I'm here to answer any questions you may have about KR vs. KP. Why the engine says this side's winning. Why some positions are inexplicably draws. And how a side can still lose (not draw, but lose), even with the rook AND the move.

strikingtan

I also get R vs. 2P endings, too. Don't be afraid to ask about thoose.

Chessisfunforme
I know a situation where the person with the rook and to move versus one pawn can lose
strikingtan
Chessisfunforme wrote:
I know a situation where the person with the rook and to move versus one pawn can lose

 

Whoa!? How do the moves go?

SmithyQ

It's actually pretty easy to set-up.  It can be done on any file and the Black King can almost anywhere as long as it is outside the square of the pawn.

ThrillerFan


Here's another case of a well known win for the pawn.  It is Black to move, and he loses, despite winning one of the two pawns with check!

 

1...Rxd6+ 2.Kb5! Rd5+ 3.Kb4! Rd4+ 4.Kb3! Rd3+ 5.Kc2! Rd4 6.c8=R!! (6.c8=Q?? Rc4+ 7.Qxc4 is stalemate) 6...Ra4 7.Kb3 1-0  (Black can't stop immediate mate without dropping the Rook)

 

 

sea_of_trees

Is it true that when a person fails a lie detector test, their pants actually catch fire?

Merovwig
 
 Here is another well-known position. White to play and win (not draw, win)
Try to solve it from the initial position without looking at the solution. grin.png

 

butilikefur

seen that in a movie

strikingtan
NMinSixMonths wrote:
I'm not sure that's possible unless the side with rook also has pawns.

The white king must attack the rook, prevent it from accessing the last rank (with the pawn on the seventh), and disallow any skewering tactics.

8K0

plz tell me about RK vs BK endgame. Is it a draw??

eric0022
8K0 wrote:

plz tell me about RK vs BK endgame. Is it a draw??

 

In majority of the cases, assuming there are only those four pieces on the board, the outcome is a draw with either side to play. In a minority of cases (some positions of which are shown below), the side having the rook wins (the side having the bishop can never win since it is not possible to come up with any series of legal moves to land a checkmate on the opposing king). These usually happen when either the bishop drops by a check-fork or the king is located near the perimeter squares of the board.

 

 

 

 

The first two diagrams are wins for the side having the rook. The third diagram is a draw with either side to move.

strikingtan

Hi @eric0022. Thanks for the input!

varelse1

What is the absolute worst thing that can happen to a Bolivian alpaca, on a Thursday afternoon in August, in New Your City's Central Park?

Please be specific.

Jenium

What's the right plan for Black in this very common kind of position.

 

If White's pawn were on a7 it would be an easy draw, but here White can try to get his/her king to a7. So how does Black counter this idea? And how would you assess the position? Cheers!

Jenium
ghost_of_pushwood wrote:

 Okay, here's my question.  Why the heck should I ask you when I can just plug the position into Nalimov?

Because narratives and "plans" are easier to memorise than moves?

Jenium

At least I can't memorize computer moves...

Jenium

Good for you

macer75

I have a question for you... and unlike some of the other ones on here, it's related to your field of expertise - namely, how do I win as white in this position (white to move):

I've asked some other people about this, but their answers weren't very helpful, probably because they weren't very knowledeable about rook and pawn endings. But you are, so tell me: how do I do it?

yureesystem
Jenium wrote:

What's the right plan for Black in this very common kind of position.

 

If White's pawn were on a7 it would be an easy draw, but here White can try to get his/her king to a7. So how does Black counter this idea? And how would you assess the position? Cheers!

 

 

1...Ra5; 2...Re5; 3...Re6 draws because it keep the white king from penetrating black position.