R v R Discussion

Discuss puzzles here to avoid spoiling them for others.

Jadedog, do you know how to put a link ? Might be better to put a link in that puzzle's thread which will bring them to here for the discussion.

Yeah, I got you. I'll do that.

and put the link here in your first post for the puzzles.

Generally the way to play R and pawn endgames is that where no obvious tactic exists you try to create a passed pawn and leverage that advantage.  To that end g5 looks like it will win for white, but it fails.  Why?

I will look into this further, but I'm guessing it's because after the exchanges white will be left with rook's pawn which is often drawn.

After some more research...

It seems that the difference is between having a single pawn and a pair of pawns. It is the kings positions, rather than the rook's pawn position which makes it drawn.

After g5 black can quickly force a draw with hxg5 fxg5, Re5+.  As you note fxg5 will also draw but takes a little more effort from black.

R v R #4 - I don't see why not, but I may've missed something?

oops a little mistake there, it need a extra pawn, blame it on the poor printing of the newspaper rather than my aging eyesight !  

Fixed.

http://www.chess.com/groups/forumview/r-v-r?lc=1#last_comment

Is this right?

this is correct for white to win but !! however there is a solution for a draw !

Ahaa! I input it into Fritz. Nice trick! I like that one, very much. 

that game came from the Candidates 2013 between Radjabov and Grischuk.

Thanks, I dug it up.

#5 what ! draw by repetition ?

Well, you want a draw, don't you? The point is; Rxc2 loses.