Supported Grid Sizes
Any size from 4×4 to 15×15! Square or rectangle - we support them all.
How to Use Custom Grids
Open Manual Input
Go to blockblastsolver.com and click the "Manual Input" button to reveal the grid controls.
Adjust Grid Dimensions
Use the + and − buttons next to "Rows" and "Cols" to set your desired grid size. Range: 4 to 15 for both dimensions.
Grid Updates Instantly
The grid recreates automatically with your new dimensions. No "Apply" button needed! Your preference is saved to your browser for next time.
Fill Your Grid & Solve
Click cells to mark filled spaces (red) or empty (green). Add your three figures below the grid. Click "Solve Manual Input" and get instant solutions!
Ready to Try Custom Grids?
Start solving puzzles of any size right now - it's free!
Frequently Asked Questions
Q: What's the minimum and maximum grid size?
A: You can create grids from 4×4 (minimum) up to 15×15 (maximum). Both square and rectangular grids are supported.
Q: Will my grid size preference be saved?
A: Yes! Your preferred dimensions are automatically saved to your browser's local storage and will be loaded next time you visit.
Q: Can I upload screenshots of custom-sized grids?
A: Currently, screenshot upload works best with standard 8×8 grids. For custom sizes, we recommend using the manual input feature for best results.
Q: Does this work on mobile?
A: Absolutely! The custom grid feature is fully responsive and works perfectly on all devices - phones, tablets, and desktops.