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Comments on Puzzle #26529: WCP #172 Emily's Riddle (really 20x20)
By W. Brayton Batson (batsonb)

peek at solution       solve puzzle
  quality:   difficulty:   solvability: moderate lookahead  

Puzzle Description:

What do you call a boomerang that doesn't come back?

#1: W. Brayton Batson (batsonb) on Aug 26, 2018

A stick
#2: Jota (jota) on Jan 2, 2019
;-)
#3: Lollipop (lollipop) on Dec 11, 2019
Good one. Or maybe a boomewrong...
#4: Wombat (wombatilim) on Mar 25, 2023 [HINT]
Initial LL completes 90%.

C1: EL marks R17-20 white. LL.

R19: If the blacks in C12 and C18 are parts of the 4 and 3, it makes R20 invalid. Therefore those blacks are the 2 and the 1. LL.

R20: EL marks C70 white.

LL to finish.
#5: Web Paint-By-Number Robot (webpbn) on Mar 25, 2023
Found to be solvable with moderate lookahead by wombatilim.

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