1
Read the shape
Count digits to know the column count. 3d² mastery H:4-6 (T,U full).
Level 15 - build-up
6 visual blocks - Duplex columns
Count digits to know the column count. 3d² mastery H:4-6 (T,U full).
Write raw Duplex columns first.
Start with the leftmost Duplex.
Compare with a nearby square.
Reach the target without avoidable misses.
Carry only after the columns are visible.
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