Complete
Starter line clear
Complete all three moves and clear a nearly finished row.
Current-tray diagnosis
Block Blast No Moves Left? Check the Current Tray
A crowded board can look blocked even when one piece still fits. Exhaustive checking separates “nothing fits now” from “not all three fit in sequence.”
Four honest result categories
- Invalid input means the reviewed board or tray cannot be evaluated under the selected profile.
- Complete sequence means all three current pieces have a legal ordered path.
- Partial legal prefix means one or two pieces can be placed, but no complete three-piece path exists.
- No legal first move means none of the three entered pieces fits the current board.
Three engine-backed situations
All three fit
Complete sequence
Starter line clear has a legal order for all three current pieces and clears a nearly completed row.
Only a prefix fits
Partial legal prefix
Honest partial result allows at least one placement, but exhaustive search cannot place the full tray.
Nothing fits now
No legal first move
No legal first move uses a checkerboard fixture where every entered shape needs adjacent empty cells that do not exist.
Original engine fixture
The exact input checked
This project-owned board and these three fixed pieces are passed to the production solver unchanged.
Piece 1square-2
Piece 2horizontal-2
Piece 3vertical-2
Production solver result
Verified no-first-move output
The checkerboard fixture returns no-first-move after exhaustively checking every legal top-left position for all three pieces.
Load each situation and solve it yourself
Choose Starter line clear, Honest partial result, or No legal first move in the example picker. One click loads the exact board and tray into the editor so you can review every cell before calculating.
Step 1
Mark the filled board cells
Click, tap, or drag to paint. Row 1 is the top row.
Step 2
Enter the three fixed pieces
Choose a preset or draw the exact orientation you see.
Current tray
Piece 1
Choose a preset
Single
Lines
Squares and rectangles
Corners
Draw a custom shape
Current tray
Piece 2
Choose a preset
Single
Lines
Squares and rectangles
Corners
Draw a custom shape
Current tray
Piece 3
Choose a preset
Single
Lines
Squares and rectangles
Corners
Draw a custom shape
Step 3
Choose a strategy and solve
Verified inputs
Try a verified example
Complete
Order matters
See why checking all six piece orders can preserve a complete sequence.
Partial
Honest partial result
Inspect the longest legal prefix when all three pieces cannot fit.
No first move
No legal first move
Verify a tray where none of the three entered pieces fits the current board.
Evidence boundary
This diagnoses only the entered current tray under provisional-classic-v1. It does not predict an official game-over state, revive or ad behavior, piece refresh, a future tray, or platform-specific UI.