In complex matrix puzzles, don't just look for sequences. Look for static properties that are true for every example box. Test rules based on rows, columns, diagonals, number of distinct symbols, or relationships between specific positions.
A quicker check for this kind of puzzle is to compare the middle row of each grid with the middle column, since every one of the five example grids shares exactly one symbol between them.
Running this check on the three grids left after the first-column test, options A, B and C, only option A keeps that same one-symbol overlap between its middle row and middle column.
Options B and C either share no symbol between the middle row and column or share two, both of which break the pattern every example grid follows.
So option A is the grid that keeps this overlap consistent with the rest of the series.
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Approach Solution -2
A third way to narrow this down is to count the total number of distinct symbols used across the whole nine-cell grid, since every one of the five example grids uses exactly six distinct symbols out of the nine cells, meaning three symbols repeat once each.
Option A: uses exactly six distinct symbols across its nine cells, matching every example grid in the series.
Option B: introduces a seventh distinct symbol, which no example grid does, so it breaks the pattern.
Option C: uses only five distinct symbols, one fewer than every example, which again breaks the established count.
Option D: was already eliminated at the first-column check, so it does not need to be counted here.
Only Option A keeps the same six-distinct-symbol structure as all five example grids, so it is the one that continues the series.
