peek at solution solve puzzle
quality: difficulty:
solvability: deep lookahead
Puzzle Description:
Zero
#1: Hans Wurst (logicalfool) on Nov 1, 2022
Nice solve. Interesting picture.#2: Wombat (wombatilim) on Jan 8, 2023 [HINT]
Initial line & color logic completes 94%, with just some black remaining in the lower left quadrant.#3: Web Paint-By-Number Robot (webpbn) on Jan 8, 2023
R28: IEL marks C1-5 white. LL.
R17: The 6 cannot go in C1-6 or it creates a contradiction in R16. LL.
R19: The 5 cannot go in C1-6 or it creates a contradiction in R20. LL.
R16: No matter where the 5 is placed, R17C15 is black.
Deep lookahead R20: If C20-21 is black, the 3 in C17 is pushed into R16, forcing the 5 in that row into C17-21. This is a contradiction since the clues in C19-20 would already be accounted for. Therefore, R20 C20-21 are white. LL finishes.
I don't see a moderate way to accomplish that last step, so I am marking this one as deep lookahead.
Found to be solvable with deep lookahead by wombatilim.
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