peek at solution solve puzzle
quality: difficulty: solvability: moderate lookahead
Puzzle Description:
(This puzzle was recovered from the 2016 database crash. Puzzle creators, please edit this puzzle and put the real description here!)
#1: Jota (jota) on Feb 5, 2019
I had to Guess!#2: Eric (kelalatir) on Oct 11, 2020
I also had to guess, only at the very end.#3: Ailsa Hebert (bazette3) on Nov 14, 2020
Enjoyed the solve! Thanks! I had to guess but if you looked at the picture then it was logical where the checked material is.#4: Andrew Schultz (blurglecruncheon) on Jul 20, 2021 [HINT]
C11-16, R12-20 require guesswork.#5: Michael Eddy (meddy) on Feb 9, 2023
As Alisa noted, it's not bad at all to guess. But trial and error seems best done with R18C14 being red and getting a contradiction. You can then eliminate the R12 reds everywhere except C15, and then color logic does the job.
A fun puzzle. Maybe I went the long way solving it just because I wanted to spend a little more time on the neat image.
Got to about 92% and had to start guessing.#6: Web Paint-By-Number Robot (webpbn) on Apr 19, 2023
Found to have a unique solution by wombatilim.#7: Web Paint-By-Number Robot (webpbn) on Apr 19, 2023
Found to be solvable with moderate lookahead by wombatilim.#8: Wombat (wombatilim) on Apr 19, 2023 [HINT]
Initial line & color logic completes 92% with red and green remaining.
C14 must have red in either R16 or R17. If it’s in R16, R16C13 is green, and R17-18 C13 are white. If the red is in R17C14, R18C14 is green. Either of these puts red in R20C14 and green in R18C14.
Line & color logic to finish.
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