Puzzle Description:

The sign speaks for itself.

#1: ryan moore (solar) on Aug 27, 2013

http://www.funnysigns.net/light-never-turns-green/

Here is the link to the original picture

Seems like it would have been simpler to say Right Turn Only with an arrow.

Bummer.

It's like the signs at our mall that says "Incoming traffic doesn't stop." Yup, it never ends.

Even though picture "logic" makes this easy, this is actually a bit hard at the end with real logic.

When LL runs out, there's a 3,1,1 left in r25, a 2 in r29 and a 3 in r31.

On the edge of deep lookahead is this:
The 3 in r25 can go in two places. If it were to go in c11-13, then it forces the 1,1 into c15 and c17. The dots that all that would force in r29 would leave no room for the 2 in r29.
So the 3 in r25 must go in c10-12.

Then after a bit of line logic, there is smile logic to finish.



Keeping it to definitely moderate lookahead, we can do this:
The 1 in c10 can go in either r25 or r31. Either way, the other one is white, forcing either c13r25 or r31 to be black. Both ways the pixel at c13r29 must be white.

Edge logic on the 2 in r29 - if it is in c14-15 then there'll be no room for the 1,1 in r25. So r29c14 must be white.

Then line logic to finish.

Found to be solvable with moderate lookahead by infrapinklizzard.

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