singlesingle
1×1 · 1 occupied cell
Space planning
Block Blast Shapes and Space Guide
Shape dimensions matter because a large empty-cell count can still hide narrow or disconnected spaces that cannot accept the current fixed piece.
Match the opening to the exact shape
Count connected geometry, not just empty cells. Nine scattered cells do not hold a 3×3 square, and five cells split across two rows do not hold a horizontal 1×5 line.
| Shape | Required opening | Occupied cells |
|---|---|---|
| 3×3 square | Contiguous 3×3 opening | 9 |
| Horizontal 1×5 | Five adjacent cells in one row | 5 |
| Vertical 5×1 | Five adjacent cells in one column | 5 |
| Wide rectangle (3×2) | Two adjacent rows of three | 6 |
| Tall rectangle (2×3) | Three adjacent rows of two | 6 |
| Corner | Orientation-specific L pocket | 3 |
Protect the hardest opening in the current tray
- Find the piece with the largest width, height, or solid footprint.
- Identify every opening that matches its current fixed orientation.
- Before placing an easier piece, check whether it consumes the last matching opening.
- Use the solver when move order or a line clear may create a new opening.
Provisional presets used by the solver
These presets come from production data and are grouped by family. Each card shows the exact fixed orientation, width × height, and occupied-cell count passed to the solver.
single
line
horizontal-2horizontal-2
2×1 · 2 occupied cells
vertical-2vertical-2
1×2 · 2 occupied cells
horizontal-3horizontal-3
3×1 · 3 occupied cells
vertical-3vertical-3
1×3 · 3 occupied cells
horizontal-4horizontal-4
4×1 · 4 occupied cells
vertical-4vertical-4
1×4 · 4 occupied cells
horizontal-5horizontal-5
5×1 · 5 occupied cells
vertical-5vertical-5
1×5 · 5 occupied cells
square
square-2square-2
2×2 · 4 occupied cells
square-3square-3
3×3 · 9 occupied cells
rectangle
rectangle-2x3rectangle-2x3
3×2 · 6 occupied cells
rectangle-3x2rectangle-3x2
2×3 · 6 occupied cells
corner
corner-top-leftcorner-top-left
2×2 · 3 occupied cells
corner-top-rightcorner-top-right
2×2 · 3 occupied cells
corner-bottom-leftcorner-bottom-left
2×2 · 3 occupied cells
corner-bottom-rightcorner-bottom-right
2×2 · 3 occupied cells
Fixed orientation and custom input
The solver does not rotate or reflect a piece automatically. A horizontal 1×5 opening does not help a vertical 5×1 piece unless a line clear changes the board first. Use the 5×5 custom editor when the current shape or orientation is not represented by a preset, then review the exact occupied cells before solving.
Evidence boundary
This is a provisional convenience list, not an official complete shape inventory. It makes no claim about production frequency, tray generation, rotation controls, or whether a future game version will use the same pieces.