Comments on Puzzle #32833: Let's have a ball 2
By Brian Bellis (mootpoint)
peek at solution solve puzzle
quality: 
difficulty: 
solvability: moderate lookahead
peek at solution solve puzzle
quality: difficulty: solvability: moderate lookahead
Puzzle Description Suppressed:Click below to view spoilers
#1: Bas (Basch) on Sep 5, 2019
Nice one. It took me only one small guess to solve it.#2: Kristen Vognild (kristen) on Sep 5, 2019 [SPOILER]
Comment Suppressed:Click below to view spoilers#3: Norma Dee (norm0908) on Sep 5, 2019
Also did some guessing. Cute picture.#4: Teresa K (fasstar) on Sep 6, 2019 [HINT]
I like it! Really tough solve. I found some hidden color logic and one instance of EL, but still had to guess a bit.#5: Web Paint-By-Number Robot (webpbn) on Apr 20, 2023
Found to be solvable with moderate lookahead by wombatilim.#6: Wombat (wombatilim) on Apr 20, 2023 [HINT]
Initial line & color logic completes 59% with only black remaining.#7: Gary Webster (glwebste) on May 19, 2024 [SPOILER]
R28: If R7-8 are black, the 2 in R27 needs to be in C5-6. This makes R29 invalid, so R28 C7-8 are white.
R28: EL marks C1 white. Minimal LL.
C4: The black in R28 will start the 2 in either R7 or in R29. Either of those will make R23C6 black. LL.
C6: A black needs to be placed in one of R16-18. Any of these will make R23C10 black. LL.
C6: LL from the previous step narrowed the options to R17-18. Either of these will make R24C10 black. LL.
C5: If there is a 2 in R17-18, C6 is invalid. Therefore the 2s must be in R20-22 and R26-29. R21C5 can be marked black. LL.
C2: If the black 2 is in R17-18, C6 is invalid, so these squares are white.
C11: The black 2 can’t be in R17-18 or C6 is invalid. Either R19 or R25-26 is black. If R19 is black, R25C10 is black. If R25-26 are black, R19C10 is black. Either one completes R19 and R25, so R19 C8-9 and C12 are white, and R25 C1-3, C8-9, and C12 are white.
C12: If R22 is black, R20 C4-5 and R21 C2-4 would be black. The 2 in C2 would need to go into R20, which makes R20 invalid. Therefore R18C12 is black instead.
LL to finish.
Comment Suppressed:Click below to view spoilers#8: Bill (PopPop) on May 20, 2024 [HINT]
For me, there were too many lookahead steps that required much searching to find, and which each yielded minimal advancement. While each one may be "moderate" I would consider the quantity of un-obvious lookaheads as rating "deep". I'm afraid it wasn't really enjoyable for me, although it's a great image. Kudos to Wombat for figuring all of that out!
Show: Spoilers
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