KP vs everything

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K+P vs. everything

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Paul Valle    (2011-01-06 07:44:10)
K+P vs. everything

Find the shortest win for White: ChessPosition (see diagram)

a b c d e f g h

Josef Riha    (2011-01-06 10:33:33)
K+P vs. everything

1. Kxe1. Then underpromote the pawn to a knight.

Thibault de Vassal    (2011-01-06 10:50:10)
K+P vs. everything

I would say something like 1.Kxe1 Qa1 2.h1N Qa2 3.Ng3 Qa1 4.Ne4 Qa2 5.Nxc5 Qa1 6.Nd7 Qa2 7.Ne5 Qa1 8.Nxc4 Qa2 9.Na5 Qa1 10.Nxb3#

The trap would be to take the pawn c4 two times, then it's a (beautiful) draw, right?

Very nice problem anyway.

Josef Riha    (2011-01-06 10:59:55)
K+P vs. everything

Hello Thibault, the white pawn is on h2, not h7!
1. .. Qa1 2. h3 etc.

Thibault de Vassal    (2011-01-06 11:59:24)
K+P vs. everything

Aaaaah... damn, again this optical problem!! Thanks Josef :) So it "may" be mate in 13 moves with two takes in c4

Paul Valle    (2011-01-08 01:00:11)
K+P vs. everything

A gem from 1922 by the Hungarian; Ottó Titusz Bláthy. Does any of your engines find the solution? 1.Kxe1 Qa1 2.h3!! [2.h4?? Qa2 3.h5 Qa1 4.h6 Qa2 5.h7 Qa1 6.h8N Qa2=] 2...Qa2 3.h4 Qa1 4.h5 Qa2 5.h6 Qa1 6.h7 Qa2 7.h8N! [7.h8Q?? Qa1 8.Qg8 Qa2 9.Qxc4 Qa1 10.Qxb3 c4 11.Qa4 b3 12.Qa7 Be7!–+] 7...Qa1 8.Nf7 Qa2 9.Nd8 Qa1 10.Nb7 Qa2 11.Nxc5 Qa1 12.Nd7 Qa2 13.Ne5 Qa1 14.Nxc4 Qa2 15.Na5 Qa1 16.Nxb3#

Josef Riha    (2011-01-08 01:21:45)
K+P vs. everything

Yes, Deep Shredder 12, Rybka 4 don't!

Thibault de Vassal    (2011-01-08 19:58:02)
K+P vs. everything

Damn... and my count was bad... I was astonished that h4 worked, of course h3 was more beautiful :)

Paul Valle    (2011-01-08 20:22:50)
K+P vs. everything

Can you get 2.h4 to work?

Thibault de Vassal    (2011-01-08 20:39:50)
K+P vs. everything

Last time yes, today not anymore so... :)

Paul Valle    (2011-01-08 21:35:14)
K+P vs. everything

hehe - I also struggled with 2.h4 (first choice of Rybka). Then i finally realized that if a knight starts of on a dark square, by moving it perpetually, it can never get to a light square in even moves, or a dark square in odd moves...





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