[Retros] Precisions about Checkless Chess tourney

Kevin Begley kevinjbegley at gmail.com
Sat May 26 20:21:46 EDT 2012

Recursive legality is a Pandora's can of *Schrödinger's cats.*
It is known to lead to outrageous paradoxes in Rex Multiplex.

Generally, an inventor is wise to avoid these issues; on the other hand,
many magical discoveries might await those courageous enough to delve
deeply into the issue.
It might offer a gold-mine, if somebody can figure out how to survey this

On Sat, May 26, 2012 at 8:13 AM, Noam Elkies <elkies at math.harvard.edu>wrote:

> "Andrew Buchanan" <andrew at anselan.com> writes:


> > In Hochberg's "Outrageous Chess Problems" I think there is a checkless

> > problem involving a couple of nightriders, but I can't remember the

> > details.


> I don't either, but it's probably something like Kd3,Rd2,Rh2/Ke5,Nc7,Nf7,

> producing the conundrum of whether Rh2-e2 is checkmate or an illegal move.



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