Rook Trick

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davidannis

I am reading a book, How to Beat Your Kids at Chess that says "Black to move draws by 1.... Kg7!. The black king simply toggles back and forth between g7 and h7."

When I tried that against my son, however, he just moved the king on g2 over and took the rook in 6 moves. Not a draw. I suppose that I could have moved the rook up to a6 as the king approached, but I don't see how I get a draw from that. What am I missing?

chasm1995

I think that you're supposed to move your rook continuously from a1 to a6 and it will be a drawn R+K v R+K endgame.

AndyClifton

Yep.  Move your rook down to a6, then when the White king moves up to attack it, play back down to a1.  As soon as White plays Kb6--thus threatening to move his rook and queen the pawn--you check the king away.

TheLastSupper

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tliu1222

You see, if Kd7, then Rh8, Rxa7, and Rh7+! skewering the rook and king. If he attacks your rook, just move it. It didn't talk about if the king tried to take the rook.

chasm1995

if it leads into this position:



chessgdt
chasm1995 wrote:

if it leads into this position:

 



1. Rh8 instead of Kf3 wins the game on the spot.

AndyClifton

Huh?  1... Ke7 loses.

AndyClifton

Thanks for the echo (and btw no need to give 1... Ra7 a "??"--that position is lost regardless).

chasm1995

Okay, I see why now.  Thanks, guys and girls.

asvpcurtis

if white is within reach of defending the pawn with his king you must bring your rook all the way back to a1 or a2. then if he touches his pawn with the king you give check to him on the b file then bring the rook back to the a file

AndyClifton

Btw OP you might well find the following link of use (I know I do).  It's good for any position at all with 6 pieces or less (and will show you all possible moves and variations):

http://www.k4it.de/index.php?topic=egtb&lang=en

asvpcurtis
Cogwheel wrote:

tablebase says win in 21 for white with Rh8

because the black king isn't on g7 or h7

Patscher
chasm1995 wrote:

if it leads into this position:

 



Rh8 and white win, because if black takes the pawn then Rh7+ wins the rook