Sudoku Blocks takes the spatial-puzzle DNA of Sudoku and crosses it with the satisfying placement mechanics of block-clearing games. Instead of placing numbers, you drag oddly-shaped pieces onto a grid, trying to fill complete rows, columns, or 3x3 sub-grids to clear them.
Simple to start, surprisingly demanding once the board fills.
You're given three block shapes at a time - some are single squares, some are L-shapes, some are long bars. Drag them onto the 9x9 grid wherever they fit, and any row, column, or 3x3 sub-grid that becomes completely full clears for points.
Keep placing until you can't fit any of the offered pieces anywhere on the board.
Traditional Sudoku is a logic puzzle - one solution exists, and you find it. Sudoku Blocks is a spatial-strategy puzzle - many configurations are possible, and you're trying to delay the inevitable game-over by clearing efficiently.
The mental gear is different, which makes it a refreshing alternative even if you've played hundreds of classic Sudoku puzzles.
Clearing multiple rows, columns, or sub-grids in a single move triggers combo bonuses that scale aggressively. A four-line clear can be worth more than the next ten single-line clears combined.
The best players don't just place pieces - they hold the board in a state where one well-positioned piece triggers a cascade.
The game loads in any modern browser via HTML5. No installs, no plugins, no account needed. It runs smoothly on Chromebooks, school computers, library PCs, and any modern phone or tablet.
The drag-and-drop controls feel natural on touch screens, making it particularly comfortable on a phone during commutes.
You're shown three block shapes at the bottom of the screen. Drag any of them onto the 9x9 grid where they fit completely. When a full row, column, or 3x3 sub-grid is filled, it clears and you score points.
After placing all three blocks, three new shapes appear. The game ends when none of the offered shapes can fit anywhere on the board.
Start From the Corners - Filling corners first leaves the open center for flexible placement; it's much easier to fit blocks in the middle than to squeeze them into edges later.
Keep One Empty Row Open - Reserve at least one row or column as a workspace; it gives you room to maneuver large blocks that arrive unexpectedly.
Watch the Sub-Grids - Combo points come from clearing rows AND sub-grids in the same move; placing pieces near 3x3 boundaries creates these multi-clear opportunities.
Long Bars Are Stress Relievers - Save them for when you have one row almost full; they're the most reliable way to trigger a clean clear.
Rotate Mentally Before Dragging - The blocks don't rotate; if a piece doesn't fit one orientation in your head, it definitely won't fit on the board.
