[Retros] destination squares
elkies at math.harvard.edu
Fri Jan 4 12:11:11 EST 2013
"Andrew Buchanan" <andrew at anselan.com> writes:
> The end position for the 3 destination mate is also similar to
> a proof game composed by Richard [later corrected: Joost de Heer]
> years ago.
The game is also known outside of problem circles as a cautionary tale
for the touch-move rule.
> The first Pal Benko problem is nicely paradoxical: because the initial
> diagram is a sound #2 as well, without any retraction!
Right, it's basically a retractor mutate -- not sure I've seen such a
problem before -- where the set and solution switch the roles of Black's
two flights (which I also suppose legitimizes the flight-taking keys
for those who care about such things).
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