A set is a board you have named and kept: the same questions in the same cells, every time you play it. Play one with a different group and the two runs sit side by side.

Columns

One column per category, six cells in it. Adding a category draws its six from the bank; click any cell to put a different question there. The row is what the cell is worth — any question in the category can fill any row, whatever rung it was written at.

Runs

Every question, across every run

Hardest first. Points are signed here — a wrong answer deducts the tile’s value — so a negative average means most groups missed it, not that the tile is cheap.