01Core mechanic
Fit geometric pieces into the grid and clear complete rows before the board fills.
02How a run ends
The run usually fails when a move creates isolated gaps or removes the free space needed to rearrange later pieces.
03Opening plan
Spend the first turns reading the full board, identify the non-reversible move and preserve at least one flexible route.
04Common mistake
Do not solve only the most obvious local match; check what that move leaves behind for the following turn.
05Advanced tip
Protect the center and avoid single-cell holes; large open rectangles give the awkward three-piece sets somewhere to go.