Derive scored cross bin counts precisely, especially when default ignores, binsof/intersect filters, and illegal tuples alter denominator math.
1. Named cross bins plus default ignore [Medium]
2. Pure auto cross count [Easy]
3. binsof-selected tuples with default ignore [Medium]
4. intersect filter removes one tuple [Hard]
5. illegal cross tuple does not close coverage [Medium]
6. Three-way cross with only custom bins scored [Hard]Work each puzzle before reading the solution: predict the exact output or answer, name the rule that governs it, then check yourself.