peek at solution solve puzzle
quality: difficulty: solvability: deep lookahead
Puzzle Description Suppressed:Click below to view spoilers
#1: Joe (infrapinklizzard) on Jun 19, 2021 [HINT]
After LL/CL leaves only green#2: Web Paint-By-Number Robot (webpbn) on Jun 19, 2021
EL 2 c25 = r24-25 white
LL
Reverse EL 3 r22: If the 3 were NOT in c21-23, then there would be a conflict in r25 in those columns. Therefore r22c21-23 must be green
LL
EL 6 r23 - if it were to go right into c17, then it would create a conflict in r22. Therefore c17 must be white
LL
EL 4 r37 : If it were to go farther right than c23 there would be no room for the 1 in r38. So r37c24 must be white
Extended EL 4 r37: if it were in c20-23, it would force the 3 in r38 into c17-19. The crossing 2s would then create a conflict in r39. Therefore r37c23 must be white
LL
Because of the 1 in c20, either the 4 in r37 or the 3 in r38 (or both) must go left into c17. Whichever does, c17r38 will be green (because of the 2 in that column)
LL
Deep lookahead:
If the 3 in r31 were to go right into c23, then the resulting whites in c21 & c22 would force both the 4 in r37 and the 2 in r39 to be in c17 - a conflict. Therefore r31c23 must be white
LL to finish
Found to be solvable with deep lookahead by infrapinklizzard.#3: CB Paul (cbpaul) on Jun 20, 2021 [SPOILER]
Comment Suppressed:Click below to view spoilers#4: Jota (jota) on Jun 20, 2021
Loved the solve and the image!#5: Bill Eisenmann (Bullet) on Jun 21, 2021 [SPOILER]
Comment Suppressed:Click below to view spoilers#6: Lizzy B (lizzyb) on Jun 21, 2021 [SPOILER]
Comment Suppressed:Click below to view spoilers#7: Joe (infrapinklizzard) on Jun 21, 2021
You got it, Lizzy! I'm glad you're enjoying them.#8: CB Paul (cbpaul) on Jun 21, 2021 [SPOILER]
Comment Suppressed:Click below to view spoilers#9: Lizzy B (lizzyb) on Jun 22, 2021
Joe, your puzzles are always a joy to solve - and then to have clever puns on top of them?! How could I not enjoy it?#10: derby (Derby) on Jun 23, 2021
Great puzzle. Thanks so much#11: Vaggelis Kamaris (evag7651) on Nov 3, 2021
Found to be solvable.
Show: Spoilers
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