I needed about 4 tries. What was causing me to be 2 off was not a specific trick, just an un-necessary move I was doing. I remove one star because I found it more elementary than high school.
(13 years ago) Well, 4 me this one was the harderst (of the 99th ...).
Needed 10 tries.
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EDIT, 14th aug., 2022 - Found 2 different 2 offs, today, give it 5 stars, now, too! (6 more tries)