peek at solution solve puzzle
quality: difficulty: solvability: moderate lookahead
Puzzle Description:
Biff from The Book of Biff comic by Chris Hallbeck. http://thebookofbiff.com
#1: Web Paint-By-Number Robot (webpbn) on Nov 11, 2013
Found to be solvable with moderate lookahead by infrapinklizzard.#2: Joe (infrapinklizzard) on Nov 11, 2013 [SPOILER]
A great comic with a flavor of My Favorite Martian meets The Far Side. I read it daily. You should, too.#3: Joe (infrapinklizzard) on Nov 11, 2013 [HINT]
http://thebookofbiff.com
It's his birthday today, so I made him a puzzle.
I'm short on time today, so this may not all be needed, but here's how I solved it: (line logic between paragraphs)#4: Norma Dee (norm0908) on Nov 11, 2013
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!#5: Jota (jota) on Nov 11, 2013
I LOVED solving this! Thanks!#6: Web Paint-By-Number Robot (webpbn) on Nov 11, 2013
Found to be solvable with moderate lookahead by infrapinklizzard.#7: Joe (infrapinklizzard) on Nov 11, 2013
I guess the first one didn't take...#8: Tom O'Connell (sensei69) on Dec 26, 2013
Thanks, Norma and Jota.
good solve#9: Joe (infrapinklizzard) on Dec 26, 2013
Thanks, Tom#10: BlackCat (BlackCat) on Oct 11, 2016
Too much guessing.#11: Joe (infrapinklizzard) on Oct 12, 2016
Try to do less of it.#12: Vaggelis Kamaris (evag7651) on Mar 9, 2018
color logic only. nice.#13: Michael Eddy (meddy) on May 26, 2022
This was very hard! But solved logically.#14: Eric (kelalatir) on Aug 25, 2024 [HINT]
Fun solve!
I'm not sure it is truly moderate lookahead though. I had to use deep lookahead once I came to the end of infrapinklizzard's clues.
Also, regarding those clues, the line that reads:
internal edge logic on the 4 in c3 makes r1-3 white
I can't figure out why r3c3 is white.
One clue that I feel is missing above, right before the line:
(after the blue 2 in c23 is color logicked)
This clue is needed first:
After completing the red and green, use color logic to place the blue 1 in r21.
And finally, the clue two-way logic on the left black 2 in r12 makes r13c3 white (because of the 1 in r13) doesn't make sense to me, unless there are more missing steps beforehand. The black 2 for me has 4 locations, and not all possible locations cause r13c3 to be white.
After this point I found lots of minor edge logic, but eventually I had to use deep lookahead to get to a point where the puzzle was solvable by line logic.
Still, this was a great puzzle, and quite a challenge!
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