K+Q v. K+R+P

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Avatar of Sambirder

I recently found myself in a position where I have a rook and a pawn while The other guy has a queen. Would a draw be the proper outcome, or would I have winning chances. 

Avatar of AtahanT
Sambirder wrote:

I recently found myself in a position where I have a rook and a pawn while The other guy has a queen. Would a draw be the proper outcome, or would I have winning chances. 


 K+Q vs K+R is a win for the side with the queen. I'd say it depends where the pawn and king is on the board.

Avatar of rooperi

If you can build a fortress to keep the King out. just never move the Rook or pawn again

Avatar of CapablancaAvenged

I'm not sure, but I bet it could be a draw or win for either player depending on where the pieces are placed. I bet a further advanced pawn is better for the R+P guy, and rook pawns are less valuable in a bunch of endgames.

Avatar of Sambirder

The position looks like this.

Avatar of rooperi
Sambirder wrote:

 

The position looks like this.

 


Yeah, that's a perfect position. TheWhite King can never get close, and the Black King can always hide behind the pawn

Avatar of Sambirder

Yes, but is there a possibility I could win with best play? I know that if a blockade happens, it's a draw, but this time I have a fifth rank knight-pawn.

Avatar of Summum_Malum

Why don't you run it through a machine?? =) Or maybe you don't have one?

Avatar of rooperi

I don't think you can win. But I could be wrong. I was once before, in '79.....

Avatar of Sambirder

I already consulted a master, he said I had a drawn game, but I'm wondering why I cannot go on the offensive, threaten to promote my pawn, and (possibly) win.

Avatar of Summum_Malum

I would imagine that if you do that, then you would have to expose your king (you can't give checks on every move), and once that happens his queen would have a good shot at forking your pawn or your rook...

Avatar of Sambirder

Probably, unless I advance my pawn with check.

Avatar of asampedas

With that position, I think it better for your king to stay behind the pawn. The queen can't attack, and the king is already off the game. All you have to do is to leave the rook on the f file and try attacking the queen, till...well, the fifty-move rule or the three-move rule.

I would say it was drawn.

Avatar of revenant_

Use online Shredder's endgame database for such positions (http://www.shredderchess.com/online-chess/online-databases/endgame-database.html). You can explore all variations there.

It says that position in question is drawn.

Avatar of RosarioVampire
rooperi wrote:

If you can build a fortress to keep the King out. just never move the Rook or pawn again

 


Yet, black does not have to continually check in the position.

Avatar of kunduk

though it depends on the position of your game, still i would perhaps prefer k+r+p

Avatar of marvellosity

It's almost always the queen that has the winning chances in these endings. Something rather special indeed has to happen for the side with the rook to have any winning chances. Just think - if you get your pawn to the 7th, where is the king going to hide from checks?

It's extremely hard for a human to win QP vs Q because of the checking possibilities, never mind RP vs Q...

Avatar of Sambirder
RosarioVampire wrote:
rooperi wrote:

If you can build a fortress to keep the King out. just never move the Rook or pawn again

 


Yet, black does not have to continually check in the position.

No, I don't- All I have to make sure is that the rook has a safe home on f6, protected by the pawn, slapping the king away with a check on the f file whenever he comes too close for comfort, and making sure my king has constant contact with the pawn- indirectly protecting the hyper-active rook.


Avatar of rooperi
marvellosity wrote:

It's extremely hard for a human to win QP vs Q because of the checking possibilities, never mind RP vs Q...


And that is an excellent point. Now I'm beginninig to wonder whether you won't lose if you try to win. With the pawn too far advanced you might deprive your King of flight squares.... just wondering

Avatar of marvellosity

Rooperi - I was being diplomatic. Unless the side with the queen has managed to put itself in the corner behind its own king, there is never a win.

See my game sequence above. White has basically achieved as good a setup as he could hope for - pawn on the 7th, rook and king nearby. The queen can ALWAYS check the king or pin the pawn to the king.

R+P has NO winning chances vs queen. ALL the winning chances reside with the queen in practically all the positions.