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CHESS
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01-Oct-2019

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MatPlus.Net Forum Helpmates A Little Fun
 
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(1) Posted by Rewan Demontay (Real Name: James Malcom) [Tuesday, Oct 15, 2019 21:58]; edited by Rewan Demontay (Real Name: James Malcom) [19-10-15]

A Little Fun


Here’s an extenion of an old idea. I came up with it awhile ago. Enjoy!

BTM h#2 Without Queening A Pawn

(= 4+4 )

 
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(2) Posted by Rewan Demontay (Real Name: James Malcom) [Tuesday, Oct 22, 2019 19:35]; edited by Rewan Demontay (Real Name: James Malcom) [19-10-22]

Here is the solution: 1. e2. e8=WK! 2. e1=WR! 0-0-0-0-0-0#! (WKe8->e6, WRe1->e7)

P1359646 introduced me to the idea of castling with a newly minted king and rook. The extra conditions, as far as I can tell, are that the new pieces must be opposite the starting sqaures of the rook and king, The new pieces have technically not moved.

I then thought, why not apply Pam-Krabbe castling? With the king promotion, it can be done on the other side of board. Black’s promotion into a White rook was the only way to do it of course. It also further serves to extend the overall joke.

Many thanks for the inspiration Andrew Buchanan!
 
 
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(3) Posted by Michael McDowell [Tuesday, Oct 22, 2019 20:15]

What's wrong with 1.Kxb7 e8R 2.Ka8 Rxb8?
 
 
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(4) Posted by Nikola Predrag [Tuesday, Oct 22, 2019 20:15]

And why not 1.Kxb7 e8R 2.Ka8 Rxb8#? - Perhaps because the illegal mate without wK?
 
   
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(5) Posted by Rewan Demontay (Real Name: James Malcom) [Tuesday, Oct 22, 2019 20:40]

Should be an easy fix.

BTM, h#2

(= 5+4 )

 
   
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(6) Posted by Zalmen Kornin [Tuesday, Oct 22, 2019 20:53]

Are You sure?! But Chess is a royalist-patriarchal game and White can't play with a vacant throne. (as already pointed out by NP).
 
   
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(7) Posted by Rewan Demontay (Real Name: James Malcom) [Tuesday, Oct 22, 2019 20:56]

Yes, I’m sure Zalmen. The entire problem isn’t meant to be orthodox. It’s a neat joke.
 
   
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(8) Posted by Geir Sune Tallaksen Østmoe [Tuesday, Oct 22, 2019 22:19]

Hmm, but then Black can also promote to wB and White mates with Bg3#.
 
   
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(9) Posted by Geir Sune Tallaksen Østmoe [Tuesday, Oct 22, 2019 22:23]

Like this, maybe?

(= 3+3 )

 
   
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(10) Posted by Siegfried Hornecker [Wednesday, Oct 23, 2019 09:05]

Not yet.
1.e2 e8K 2.e1wQ Qe7#
 
   
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(11) Posted by Geir Sune Tallaksen Østmoe [Wednesday, Oct 23, 2019 11:53]

Yes, but there is still the restriction «without queening a pawn.» Otherwise, I don’t think you can prevent 1...e8Q 2...Qe7#.
 
   
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(12) Posted by Rewan Demontay (Real Name: James Malcom) [Wednesday, Oct 23, 2019 12:55]

Geir has found a correct diagram.

And Siegfried, there is the restriction of no pawn queening.
 
   
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(13) Posted by Zalmen Kornin [Wednesday, Oct 23, 2019 14:24]

twin (b) Pe3 to e2: 1.e1=wR e8=N+ 2.Kd7 Re7# (not 1...e8=K 2.?? Zz)
 
   
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(14) Posted by Geir Sune Tallaksen Østmoe [Wednesday, Oct 23, 2019 14:40]

Excellent idea, but there is also 1.e1wR e8bN 2.Nd6 Re7#.
 
   
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(15) Posted by Zalmen Kornin [Wednesday, Oct 23, 2019 15:00]

Better than excellent. It should be a way to fix the dual, because Your mate is ideal.
 
   
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(16) Posted by Zalmen Kornin [Wednesday, Oct 23, 2019 18:21]; edited by Zalmen Kornin [19-10-23]

(= 4+3 )

(b) pe3 to e2

*!?

# (or b before a :: because Knight f8 have no function in a)

(= 4+3 )


(b) pe2 to e3

#
 
   
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(17) Posted by Siegfried Hornecker [Wednesday, Oct 23, 2019 19:07]; edited by Siegfried Hornecker [19-10-23]

Yes, you are right. I had forgotten about the restriction.

Great settings you found!
(EDIT: I meant in general, not only directed at Zalmen Kornin)
 
   
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(18) Posted by Nikola Predrag [Wednesday, Oct 23, 2019 19:39]

Wow, I'm unable see what's so great about wSf8.
 
   
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(19) Posted by Zalmen Kornin [Wednesday, Oct 23, 2019 21:48]

Do You prefer two promotions to Knights of opposite colors in e8!? Well, for me it's ok... The mating frames are different

(= 3+3 )

 
   
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(20) Posted by Joost de Heer [Wednesday, Oct 23, 2019 23:00]

Black moves (Kd7 and e1=wR) can be interchanged.
 
   
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MatPlus.Net Forum Helpmates A Little Fun