peek at solution solve puzzle
quality: difficulty:
solvability: moderate lookahead
Puzzle Description:
(This puzzle was recovered from the 2016 database crash. Puzzle creators, please edit this puzzle and put the real description here!)
#1: derby (Derby) on Nov 15, 2019
Good image. One challenging place in the puzzle to overcome. Otherwise, quite straight forward#2: Web Paint-By-Number Robot (webpbn) on May 29, 2020
Found to have a unique solution by infrapinklizzard.#3: Web Paint-By-Number Robot (webpbn) on May 29, 2020
Found to be solvable with moderate lookahead by infrapinklizzard.#4: Joe (infrapinklizzard) on May 29, 2020 [HINT]
After LL
EL 7 c20 rules out r20-26
LL
EL 2 c22: if it were in r13-14, it would not leave anywhere for the 1 in r15 to go. Therefore c22r13 must be white.
(this can also be done as two-way logic on the 1 in r15 - in both places it can go, it forces c22r13 to be white)
LL to finish
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