1 · Fill the square gap
Clear at least 1 row without adding holes.
An aligned square closes the bottom row. Placing it on top of a filled surface leaves the original gap unfilled. Check the whole row, not just the shape’s top edge.
FREE TETRIS · PRACTICE
Placement practice
Four untimed exercises for reading gaps and avoiding holes. Move or rotate the piece, inspect its preview, then place it. The compact practice board is a teaching model, not a ranked run.
Choose an exercise and a starting column (numbered from the left). Use Rotate to change the piece. The outlined cells show its landing. After placing, compare cleared rows and holes. Retry the same board as often as you like.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
|---|---|---|---|---|---|---|---|---|---|
| · | · | · | · | · | · | · | · | · | · |
| · | · | · | · | · | · | · | · | · | · |
| · | · | · | · | · | · | · | · | · | · |
| · | · | · | · | · | · | · | · | · | · |
| · | · | · | · | · | · | · | · | · | · |
| · | · | · | · | · | · | · | · | · | · |
| · | · | · | · | · | · | · | · | · | · |
| ■ | ■ | ■ | ■ | · | · | ■ | ■ | ■ | ■ |
Fill the square gap
Clear at least 1 row without adding holes.
Practice results stay in this page’s memory and disappear on reload. Nothing is sent to the score API, saved as your personal best or added to global rankings. Read the explanation even after a successful clear.
Exercise
2 · Use the side well
Clear all 4 prepared rows.
The four-cell-deep well is ready for a vertical long piece. In a full game, creating this well is useful only if you can keep the rest of the stack manageable.
3 · Close a two-row channel
Clear 2 rows without adding holes.
Two rows disappear, leaving the upper part of the placed piece behind. A multi-row clear does not always leave an empty board; inspect the new surface before your next decision.
4 · Protect an open gap
Add no holes; a row clear is not required.
A horizontal piece can bridge a low area and trap an empty cell. A vertical piece on the flat left edge avoids new holes. A safe placement can be valuable even when it earns no line points.