[Retros] Eric's off-topic idea
A J Mestel
A.J.Mestel at damtp.cam.ac.uk
Sat Sep 15 02:49:01 EDT 2012
Yes, I wasn't attempting to produce a shortest proof-game. I was trying to
decide whether a position with only a few pawns on could be "legal" i.e.
in Mathematician's language it was an "existence proof game" not a
"uniqueness proof game"...
If kings are not royal, then the Mate in 3 in the original poaition,
discussed earlier may be sound:
1Nf3? (Ne5, Ng5) f6!
1Nc3? c6!
1c4? (2Qa4, Qb3) Na6! 3Qa4 d6! or 3Qb3 Nb4!
1e3? Nf6! 2Bc4 Nd5! or 2 Qf3 b6!
1c3!
If Kings are Royal then I think 1 c4 is a cook. Is that right?
J
On Fri, 14 Sep 2012, Noam Elkies wrote:
> ...and come to think of that, the last move of AJM's sample game is
> a bit of a surprise too:
>
>> 12 bxc8=Q+ (to the pawns!) Kxc8
>
> So a pawn is a royal piece that loses its royalhood upon promotion?
> I'd have expected that royal pawns normally promote to royal pieces
> (indeed losing royalty seems to contradict "promotion"...).
>
> NDE
>
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