Follows the checkerboard in first row, by slowly matching one square at a time. May require constant cueing or support.
Errors the in checkerboard may begin in the second row.
The checkerboard pattern is lost by the third row and is not corrected with cueing.
By the end of the third row their mental energy is exhausted.
The single striking feature is alternating colours in one row.
Score
The tentative score is ACL 4.2.