Block Blast Board Solver Planner
Enter your board and up to three pieces. Compare legal placements and inspect each cleared line.
Behind the result – No mystery in the method
A bounded placement search
The planner reads the occupied cells of an 8 × 8 board and the occupied cells in each of up to three 5 × 5 piece editors. It trims empty edges without rotating or reflecting a piece, tries non-overlapping placements, then clears all full rows and columns simultaneously after each move. It searches piece orders with a beam of up to 80 candidate states at each depth. It prefers more entered pieces placed, then more lines cleared, then useful open space. This is a heuristic search, not an exhaustive proof of the best move.
It does not modify the game, access a game account, download anything, or store entered data on a server. Board and result data exist in this open browser tab only. Reloading or leaving the page clears them. Blank optional fields are omitted from the result. Entered text is displayed literally, not interpreted as HTML.
All results are suggestions for fun and practice only, not a guarantee of a win. Nothing on this site changes the game or knows which pieces come next.
Before you go
Why are coordinates different from my piece editor?
The planner trims empty borders from a piece. Row and column coordinates refer to the top-left of that trimmed bounding box, counted from 1 at the board’s top-left.
Why can a different move be better?
The search keeps only 80 candidates per depth and sees only the entered pieces. A promising branch can be pruned, and later pieces are unknown. Inspect the method rather than treating the first result as a guarantee.
Does this play the game for me?
No. The tool never controls the game. It works on your inputs here, and you decide whether to try any suggestion yourself.
Can I share or print the result?
Yes. After a result appears, use Copy plan for plain text or Print plan for the browser’s print dialog. Printing may offer a PDF destination on your device. This site does not initiate a file download.
Does the site store my game account?
No game account is requested or connected. Puzzle inputs are not sent to a server or written to browser storage. The host still receives normal page requests; see the Privacy Policy for the distinction.