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Pattern Copy shows a pattern and asks you to reproduce it exactly. Unlike a recall test, the emphasis is on precision — getting most of it right is not the same as getting it right, and the scoring reflects that.
A pattern is displayed.
Study it, then it is hidden or you begin copying.
Reproduce the pattern cell by cell.
Every cell must match exactly.
Patterns grow more complex as you progress.
Visual pattern memory with a precision requirement. Approximate memory is much easier than exact memory, and this task only rewards the second.
Encode structure, not cells. Symmetry, repetition and shapes compress the pattern enormously.
Check for symmetry first. A symmetric pattern is half as much to remember.
Reproduce in a consistent order — top left to bottom right — so you never lose your place.
Count the filled cells during the study phase as a checksum.
Yes. Partial matches score partially, but a complete copy is what advances the round.
Often enough that checking for it first is worthwhile.
Brick Collapse asks you to click remembered positions. This asks you to construct the pattern, which is a finer-grained demand.
Find the underlying structure. Nobody memorises twenty cells; they memorise three rules.