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#1: Web Paint-By-Number Robot (webpbn) on Nov 11, 2013

Found to be solvable with moderate lookahead by infrapinklizzard.

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I'm short on time today, so this may not all be needed, but here's how I solved it: (line logic between paragraphs)

after easy ll/cl,

careful color logic on the blue 7 and 5 in c9 & c10

internal edge logic on the 4 in c3 makes r1-3 white
internal edge logic on the 3 in c3 makes r14 white

(after the blue 2 in c23 is color logicked)
edge logic on the 3 in r23 makes c25 white

edge logic on the 3 in r21 makes c12 white
(use cl on r22)

color logic on the blue 2 in c12 makes r6-7 blue
cl blue 5 in c25 and the 4 in c24 places them
cl 2 r8 makes c23-24 blue

edge logic on the black 2 in r16 makes c26-27 white
then ll finishes the rightmost four columns

edge logic on the 2 in c26 makes r10 white

edge logic on the black 4 in c24 makes r9 *not black* so r13 is black

then cl places the rest of the blue - only black left now.

two-way logic on the left black 2 in r12 makes r13c3 white (because of the 1 in r13)

Then line logic to finish.

Better than the original!

I LOVED solving this! Thanks!

Found to be solvable with moderate lookahead by infrapinklizzard.

I guess the first one didn't take...


Thanks, Norma and Jota.

good solve

Thanks, Tom

Too much guessing.

Try to do less of it.

color logic only. nice.

This was very hard! But solved logically.

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