LS-001

Find the next letter: R – W – Z – E – H – ?

Rule: Alternate shifts: +5, +3, +5, +3, ... so next continues the pattern.

So the next letter is M.

• Picking the first pattern you see without checking it against all rows/columns.
• Ignoring the simplest rule (counts, rotations, alternations) and jumping to a complex story.
• Not testing your rule on the middle row/column (where many puzzles “break” bad rules).