[Retros] Last move economy record

[Alain BROBECKER]

> From: "Mario Richter" <mri_two at t-online.de>



> > Luigi Ceriani, ?

> > 4|........

> > 3|....PPPk

> > 2|...PPprb      Q-  11/111

> > 1|.....KQ.      8/8/8/8/8/4PPPk/3PPprb/5KQ1

> >  +--------

> >   abcdefgh

> > 7+4: Last move?

> >

> > The retro play seems to go like:  n.Qh1-g1 n-1...Bg1xNh2

> > n-1.Ng4x?h2 but whatever ? stands for, Black is retro

> > stalemated????? Does the problem contains an error, or

> > does my reasoning do?

> 

> The latter.

> Retroplay: R: -1.Qh1-g1 Bg1-h2 -2.Ph2xYg3+ (Y=e.g.R)


Thank you very much for correcting me. My apologies for
asking dumb questions, but you'll get used to it! :)


> > 2.Where is the 14th A+B position? ...

> > "Of these 178 positions two are identical for type A, B and C

> > (KxQ and PxQ=N); and 14 are identical for type A and B."

> > I used a spreadsheet (works) and it gave the following identical

> positions:

> > BxB, BxP, NxB, NxN, NxP, PxB, PxP, PxR, QxB, QxQ, QxR, RxQ, RxR which

> makes

> > only 13 identical positions.

> 

> There is a typo (a superfluous empty space) in the FEN for Typ A RxP.


Thanks again.

Sincerely yours, Alain

Alain Brobecker (abrobecker at yahoo.com) |_  _  _ |_
http://abrobecker.free.fr/             |_)(_|(_|| ) of  Arm's Tech


 
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