A completed Sudoku has been sliced into pieces. Put it back together using numbers as your only guide — no picture, no edge matching.
Each coloured region is a piece. The numbers inside it are fixed — they came from a valid Sudoku. Your job is to figure out where each piece belongs so every row, column and 3×3 box contains 1–9.
Shape gives you constraints.
Numbers give you logic.
Each card shows the piece's shape and the numbers it carries. Drag it onto the grid, or tap a piece then tap a cell to place it.
The piece snaps so its top-left corner lands on the cell you drop it onto. On medium and hard, rotate pieces with the ↻ button.
Cells turn red if a digit appears twice in the same row, column, or 3×3 box. Fix them before you run out of space.
Place every piece correctly and you win. Use Hint to auto-place the next piece, or Undo to step back.
Larger pieces with no rotation required. Great for learning the core logic.
Irregular pieces that can be rotated, requiring a tighter logical grip.
Small, oddly shaped pieces with rotation. Pure deduction from start to finish.
Free to play in your browser — no account, no install, no ads.
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