[Retros] Chess960 promotion spot

[per olin]

Joost de Heer kirjoitti 03.12.2012 kello 17:20:

> On Mon, December 3, 2012 16:11, per olin wrote:

> > Dear Andrey,

> >

> > Thank you for your kind comment!

> >

> > Interesting observation about coming to the Chess960IP with black to move.

> > My guess is that a proof game can be made with only either party coming to

> > his initial position after a uneven number of moves. The other party has

> > to motivate the unique sequence of the moves by both parties.

> >

> > A short one: Chess960IP NNRKBQRB and 1.g4 Nb6 2.Bc6 Nxc6 3.Rg3 Ra8 4.Rb3

> > Rb8 5.f3 Na8 6.Rb6 Rc8 7.b3 Nb8 C+ Popeye.

> >

> > Retrocorner colleagues are invited to try to make a Chess960 proof game,

> > where as many black pieces as possible take part in losing the tempo!

> >

> > Best wishes

> >

> > Per

> 

> Hello Per,

> 

> I think what Andrei tried to say is that there are Chess960 begin

> positions which, after a few moves, are reached with the opposite

>  side to

> move. Simple example:

> 

> Chess960 RSSBQKBR

> 1. Sa3 Sa6 2. Sb3 Sb8 3. Rc1 Sa6 4. Rb1 Sb8 5. Ra1 Sa6 6. Sb1 Sb8 7. Sc1

> and the beginposition is reached with the other side to move.

> 

> Joost


Hallo Joost,

Yes, I think that I also understood Andrey's point. Our move sequences are almost identical, I only put the play into a unique move sequence in order to show a proof game possibility. Andrey's observation can be put into a proof game; it remains to be seen how sophisticated that will be.

Best wishes

Per

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