peek at solution solve puzzle
quality: difficulty: solvability: moderate lookahead
Puzzle Description:
(This puzzle was recovered from the 2016 database crash. Description not available.)
#1: Web Paint-By-Number Robot (webpbn) on Aug 4, 2022 classify
Found to have a unique solution by valerie.#2: Web Paint-By-Number Robot (webpbn) on Aug 4, 2022 classify
Found to be solvable with moderate lookahead by valerie.#3: Valerie Mates (valerie) on Aug 4, 2022 [HINT] classify
Here's how I solved it.
Use line logic in between each paragraph.
Smile logic on the "A."
Internal edge logic on the 5 in row 26 tells you that it can't go in the first 10 columns.
Ditto for the 5 in row 35, so it has to go in columns 20-26. Then, if you place the second 5 in row 35 all the way to the right, there's a contradiction pretty quickly. So row 35 column 26 is a dot. Ditto for row 35 column 20. So the second 5 in row 35 spans columns 21-25.
Next, internal edge logic on the red 3 in column 15, moving bottom to top, places it in rows 13-15.
Next, try placing the black 3 in column 1 in rows 33-35. Contradiction, so column 1 row 35 is a dot. Then try it in rows 32-34. Contradiction, so column 1 row 34 is a dot. Then try placing the black 3 in column 10 in rows 33-35. Contradiction, so column 10 row 35 is a dot. Then try it in rows 32-34. Contradiction, so column 10 row 34 is a dot.
Then smile logic on the "Y".
And you're done!
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