Puzzle Description:

#1: Aurelian Ginkgo (AurelianGinkgo) on May 24, 2020

Gotta destroy 'em all.

Love it! It is rather thought-provoking, in an odd way.

no guessing, just some edge logic is needed.

drat, I can no longer change the solvability ruling.

help! having trouble finding logical steps forward. i mean, i can "guess" where they probably go, but i can go very far down a wrong path and come to another dead-end without a single contradiction. need help with the edge logic that logically moves me forward?

Hmm, I re-solved it, to see if I'd taken any logical shortcuts. The edge logic on either side (columns 1 and 20) is pretty straightforward, and it's line and color logic from there.

apparently i'm better at color logic than edge because i have all of the red placed, but only have 8 blacks in C1 and C20 :(

Maybe 2-way logic is a more accurate term. And maybe I'm assuming too much, by placing the "2" clues at the ends of the columns of "1" clues.

yeah, i'm guessing that's where they'll go eventually, but still looking for a logical way to get there. there's room for both 2's in C2 and C19 to go below R13 and when you lookahead there is no contradiction in sight. i don't want to guess even if there's a high probability of being right. easy guessing is still guessing...i'll keep looking

I was only able to solve it by using multiple step edge logic, i.e. guessing, where after some edge logic on the sides and placing the red, I placed the 4 blacks in row 6, then sequentially placed some of the others, sometimes going 3 deep in guessing before I was able to eliminate something. Would love to see another detailed explanation of how it can be done.

When placing the 2's in columns 2 and 19, I like to use something I call "continuity logic". Yes, there are other ways to place the 2's but it leads to a discontinuous line and puzzle makers just don't do that. We don't just put a random 2x2 block not connected to anything. It is clear from the look of the clues as a whole that there are two continuous borders here.

I suppose it is technically guessing or picture logic but it works to get you to the correct solution 99.99% of the time.

I think I remember someone breaking this "rule" once. (Maybe Joe?). I also made a puzzle with the same set of clues repeated but with different picture. I'll try to find it.

Found it...actually, them. I had challenged makers to come up with two puzzles with the same clues repeated either vertically or horizontally. A few of us stepped up. Look up Brian's Challenge.

Thanks!

Yeah, I'm not knocking the strategy of "continuity" or picture-based solving, but it is intuition, not logic. It's similar to the multiple solutions differentiation between "easily guessed" or not. You use the image as your basis, but it's still guessing. I'm just trying to figure out whether there's a logical solve here.

I think Gator did a couple of those. They were abstract flower-ish designs.

I don't use that sort of edge unless my puzzles don't solve easily, because the picture always comes first.

Initial line & color logic solves 32% with only black remaining.

C1: EL marks R12-13 black. LL.
C20: EL marks R6-8 and R12-13 black. LL.

From here I'm with David. It's easy enough to guess where to go, but I'm not finding any way to prove it logically.

Goto next topic

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