﻿﻿ MatPlus.Net

Website founded by
Milan Velimirović
in 2006

14:16 UTC
 ISC 2021

Remember me

 CHESS SOLVINGTournamentsRating lists1-Apr-2021
 B P C F

### Evil spirits

Andrey Selivanov's S#3 from the "Show me your problem" section reminds me of the following S#2 which keeps haunting me from its first day of appearance, yowling at me: "unfinished business, am I not?"
To translate this into a concrete question: can the idea be shown without the Zeroposition?
A "normal" twin should do the trick, not to speak of a simple try (or set) & solution.
Could anyone make the evil spirits go away?

Yochanan AFEK
Uri AVNER *
Die Schwalbe 1982
3rd Prize
(= 10+10 )

s#2
Zeroposition
a) +WPa4
b) +BPb5

a)
1.d3!
1…Kxb6 2.Qc5+ Kxc5# (A)
1…Rxb6 2.Qb5+ Rxb5# (B)
1…axb6 2.Bxa6 b5# (C)
b)
1.d4!
1…Kxb6 2.Qxb5+ Kxb5# (B)
1…Rxb6 2.Ba6 R~# (C)
1…axb6 2.Qc5+ bxc5# (A)

* Order of names above the diagram has been swapped by Administrator after the request by author of this post.

Hi Uri,

Because of the complexity of the scheme it's very hard to imagine that it's possible to find position without zero position. The best position that I found without zero positions is:

(= 9+9 )

a) diagram
b) -bPb5

a) 1.Ng7!
b) 1.Ndc3!

Of course this change a genre I am sure this is not what you expected but anyway I decided to reply. This may help somebody to come up with an ortodox version without zero position twin.

Miodrag , in diagram position bPf7 is not necessary. In b) works bPb5->f7.

Hi Misha,
Thanks for trying. This, evidently, is not exactly what I had in mind, but it serves to show how close the orthodox position is to the possibility of a "regular" twin. Not much is needed, and yet...

Sorry for the late response (I have just joined as a member): Another evil spirit should wonder: was it the original order of composers above the diagram? apparently not and not without a good reason.

To shake off at least certain spirits, I have no problem to switch names.

Matter settled