Weekly endgame study | October 11, 2010 0:02

Weekly Endgame Study (190)

Weekly Endgame StudyEvery week we present you an endgame study selected by IM Yochanan Afek: player, trainer, endgame study composer and writer. A week later the solution is published. Good luck solving!



V. Kondratiev
2004

White to play and win

Next week the solution.


Solution last week

Y. Afek
1978

Game viewer by ChessTempo

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Yochanan Afek's picture
Author: Yochanan Afek

IM Yochanan Afek is a chess player, trainer, endgame study composer and writer. His complete selection of studies can be found here.

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Comments

vladimirOo's picture

Can you explain the difference in last week's puzzle between a8=B!! and a8=Q? ? I am a bit puzzled...

Frits Fritschy's picture

The problem is there is a wrong conclusion in the solution. The position after 12... Kxf1 is a draw, not a win. After 4 a8B Kf1 5 Bxh1 black has Bh2, so there is no stalemate and white wins.

K. Henriksen's picture

Let's see...

1. Ne2 Bxe2 (1...Rd3 2.Nxd3 +-) 2.d8=Q Rg3+ (2...Bc4+ 3.Kh7 Rc1 (3...Bd3+ 4.Kh8 +-) 4.Qa5+ K[g,h]4 5.Qd2 g1=Q 6.Bxg1 Rxg1 7.Q[d4,h2]+ +-) 3.Kh7 g1=Q (3... Bd3+ 4.Kh8 +-) 4.Bxg1 Rxg1 5.Qe8+ +-

I think I got most of it.

Willem's picture

1.Ne2 g1Q+ and 2.Bxg1 Bh3 or 2.Nxg1 Ba6

K. Henriksen's picture

Yes, but: 1.Ne2 g1=Q+ 2.Bxg1 Bh3 3.Nf4+ Kh6 (3... K[g5,h4] 4.d8=Q+ or 3... Kg[4,6] 4.Nxh3 Rd3 5.Nf4+) 4.Nxh3 Rd3 5.Be3+ +-

Oh, and I mistyped the first side variation in my last post. It should obviously read 1... Rd3 2.Nf4+ K~ 3.Nxd3.

It's easy to make mistakes when you're solving without a board.

K. Henriksen's picture

And again I noticed a typo. White should obviously play Nf2+ to pick up black's rook after 3...Kg4 and not the impossible "4.Nf4+". It would be nice if you could edit your posts.

Willem's picture

after 5.Be3 Rxe3 6.Nf4 fails to 6....Re7 7.d8Q Rg7+ 8.Kf8 Rg8 9.Kxg8 stalemate.
So 6.Nf2 Rg3+ 7. Kh8 wins (7.Kf8 Rf3 8.Ke7 Re3+ etc.)

K. Henriksen's picture

Cute. I had completely missed the stalemate after 6.d8=Q?? 6...Re8+.

Sergio's picture

Question about last week:

Why can't white play 1. exf3, and avoid all stalemates?

Willem's picture

1.exf3 Bf2+ 2.Ke2 Kg2 3.f8Q h1Q
Black will have sufficient counterplay

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