Endgame analysis

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Arpad Rusz
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Endgame analysis

Post by Arpad Rusz » Mon Feb 14, 2011 12:05 am

I propose a permanent topic for endgame analysis. So if you have some nice endgames maybe this is the place to show us.

1.R.Petrak, Ceskoslovensky Sach, 1991
[D]4k3/8/7p/p3p1pP/Pp1pPpP1/1PpP1P2/2P5/3QK3 w - - 0 1

It's a draw or white wins?

2.P.Cathignol, Themes-64, 1981
[D]5k2/8/pppppppp/8/PPPPPPPP/8/8/5K2 w - - 0 1

Another position with 16 pawns. White wins!

Arpad Rusz
Posts: 270
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Location: Budapest

Re: Endgame analysis

Post by Arpad Rusz » Mon Feb 14, 2011 2:11 am

3.O. Bláthy, Vielzügige Schachaufgaben, 1890
[D]1k6/1P3ppp/P1p5/1pP5/p1p3p1/2P1K1P1/1P3P1P/8 w - - 0 1

White wins

This is easy to solve... by the human players. :wink:

Tom Barrister
Posts: 227
Joined: Tue Oct 05, 2010 3:29 pm

Re: Endgame analysis

Post by Tom Barrister » Mon Feb 14, 2011 5:29 pm

Are we supposed to let the engines try to solve these, post the solutions ourselves, or solve them silently and let others try them as well?
This production is being brought to you by Rybka: "The engine made from scratch.™"

Damir
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Full name: Damir Desevac

Re: Endgame analysis

Post by Damir » Mon Feb 14, 2011 5:46 pm

Draw maybe ?

Arpad Rusz
Posts: 270
Joined: Sat Apr 17, 2010 12:34 pm
Location: Budapest

Re: Endgame analysis

Post by Arpad Rusz » Mon Feb 14, 2011 6:09 pm

Probably the best would be to give a few hours for the others to try to solve the positions. After that anybody is free to post the solutions.
The first three positions were already posted last night, so now it's time for solutions. :wink:

(Hint1) The first position is not a draw! 8-)

Damir
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Full name: Damir Desevac

Re: Endgame analysis

Post by Damir » Mon Feb 14, 2011 6:12 pm

I meant the last, not the first...

Arpad Rusz
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Location: Budapest

Re: Endgame analysis

Post by Arpad Rusz » Mon Feb 14, 2011 6:14 pm

All three endgames are wins for white!

Jouni
Posts: 2347
Joined: Wed Mar 08, 2006 7:15 pm

Re: Endgame analysis

Post by Jouni » Mon Feb 14, 2011 6:48 pm

2. is easy for SF 2 (if correct :) ):

Analysis by Stockfish 2.0 JA 64bit:

1.d5 cxd5 2.a5 bxa5 3.b5 axb5 4.cxb5 Ke7 5.b6 Kd7 6.b7 Kc7 7.g5 hxg5 8.f5 gxf5 9.exf5 exf5 10.h5 Kxb7 11.h6 Kc7 12.h7 Kd7 13.h8Q Ke7 14.Qa8 d4 15.Qxa5 Ke6 16.Qa7 d3
+- (8.80) Depth: 30/42 00:05:47 874mN

Jouni

Arpad Rusz
Posts: 270
Joined: Sat Apr 17, 2010 12:34 pm
Location: Budapest

Re: Endgame analysis

Post by Arpad Rusz » Mon Feb 14, 2011 7:19 pm

Yes, that's the solution for the second puzzle. It seems like only 1.d5! wins. Stockfish has a good solving time!

Tom Barrister
Posts: 227
Joined: Tue Oct 05, 2010 3:29 pm

Re: Endgame analysis

Post by Tom Barrister » Mon Feb 14, 2011 7:41 pm

I can't find a way for White to win the first game.

1 d5 is correct for position 2.

The third position is one of Otto Bláthy's specialties. White creates a rut in the floor, walking back and forth from b1/a1 to b4, until Black's waiting (pawn) moves are exhausted.
This production is being brought to you by Rybka: "The engine made from scratch.™"

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