[Retros] Chess960 promotion spot
per.olin at luukku.com
Mon Dec 3 10:49:10 EST 2012
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.
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.
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