White to move. What is the best continuation for White?
8/8/R4p2/5k2/2n4P/2p2K2/P7/8 w - - 0 51
Alena, Told you, very difficult problem. Here is the comments section from its previous posting on Ms.Polgar's site: <a href="http://web.chessdailynews.com/very-difficult-endgame-challenge/#comments">Link</a>. I wrote 8 comments, 7 of which were analysis trying to solve it. Like I wrote above, I found the first move pretty quickly since I had a pretty good background in such rook endings already, but there were parts of the solution that were difficult to find and understand. The line you give is the one I considered to be the most resistant. If you have access to the Lomonosov Tablebase, it would probably be worthwhile to study all the variations. Unlike the Nalimov, however, the Lomonosov must be purchased still.
Here is the solution for the second puzzle.
I had to look through my encyclopedia of rook ending to understand how to solve this endings with rooks on h-file.
Also the flexibility you can have knowing these endings...you can see them in the middle game and go for them and your opponent might be awed at the beautiful work!
You know though Yancey, this is really good practicing blind chess. And the hard endings after gruelling hard over them when you are shown the answer you remember it so much better.
Surpriselover, it is a tough, tough puzzle. The first time I encountered it, I found the first move pretty quickly, even if I didn't really understand all the details. Even then, I struggled to find both the best lines for black and white afterwards. Of course, you can now buy the Lomonosov Tablebases, and it will no doubt give you the full details on this 7-man problem right from the starting move.