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 Jan 31, 2021

Oh! Oh!

Initial line & color logic gets to 25%.

C15: Whether the green 4 goes into R21 or R23, R21C16 is green. Color logic marks R23C16 white.
R26C17 can't be green without causing a contradiction in C16 or C18, so it is white.
C21: EL marks R30 white. Small amount of LL.
R14: Either C24 or C25 must be black. Either one puts a black into R13, so R13C20 must be white. Small amount of LL.
C25: EL v. C23 marks R1-2 and R17 white. LL.
C24: Whether the black 2 goes into R15 or R17, R17C23 is black.

Line & color logic finishes from there.

Found to be solvable with moderate lookahead by wombatilim.

Found to have a unique solution by wombatilim.

I used Wombat's way up to c18-9 R3-14 being green, then C25 edge logic was the way to go for me. If C24/25 are placed too high up, then there is no space for the 1's in row 14.

Found to be solvable by line and color logic alone by dbouldin.

Really hard to find them, but there are line/color logic moves all the way through. Wonderfully fun challenge to solve it this way too!

Goto next topic

You must register and log in to be able to participate in this discussion.