Not only is there the possibility of more than one equally good move, there is
the prospect that humans might pick something which (in the eyes of the
program)
is slightly less than optimal.
I've often had pros tell me that more than one move is playable. Among mere
mortals, the selection would be a little broader.
On the other hand, in some situations the probability of a particular response
is 80-90%. The pros, in their analysis, are considering one "normal" move,
which
is their most likely response, and looking for a play elsewhere which would
justify a tenuki.
Hence, I don't like the "ponder only the one best move" strategy - but I do
think the "best move" or "best moves" should be heavily favored during
pondering.
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