"I prefer to dive in, explore, get..." stuck?
ROTFL
Still, i agree that the puzzle was designed to be one of the sound problems. I solved it the first time (15 years ago?) by sound. But since i have a poor memory (worse now than then), the next time i played the subway puzzle i had not a clue.
So, what i did that time was do what i do when I'm plodding museums: I go left, taking each turn until it returns me to the last main artery. After a time, you may be sure of having covered everything.
That worked better than the sound system.
The next time,though, i decided to make the map
and do the left hand turns. This was by far the most efficient way of doing it.
But efficiency isn't everything, is it?
What you
don't have after running the subway by bongs and gongs is a coherent image of the whole. Instead, the bong-gong way gives a linear mind the linear experience of so many events. Its a bit like knots on a long crooked shoe lace, except one never gets to see the shoe lace, so one is left with the memory of some of the knots.
Unfortunately, my head is hopelessly spatial. So, for me maps are not only efficient, they tell a story and add considerable richness to the character of the shoe string.
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pappou (avatar)