Free block puzzle variant

Tetris Sudoku

Place block shapes on a Sudoku-style 9x9 board. Clear full rows, columns, and 3x3 boxes before the next piece traps you.

Tetris mode allows rotation. Classic block Sudoku keeps every shape fixed.

Classic Sudoku
Score 0
Best 0
Combo 0

Select a piece, then tap the board to place it.

Adjust placement

Sudoku pressure, block puzzle rhythm.

Tetris Sudoku, also called block Sudoku or Blockudoku, swaps numbered logic for spatial planning. The board still uses Sudoku's 3x3 regions, but your job is to manage space and clear lines.

Prefer the original number puzzle? Start a clean free Sudoku game or try a timed daily Sudoku.

How to play

  1. Select one of the three available block pieces.
  2. Tap an open board position to place the full shape.
  3. Complete any row, column, or 3x3 Sudoku box to clear it.
  4. The game ends when none of the remaining pieces fit.

Modes

  • Tetris: rotate the selected piece before placing it.
  • Classic: fixed pieces, closer to traditional block Sudoku rules.

Strategy

  • Keep the center boxes flexible; they touch the most clearing paths.
  • Do not chase a single row if it blocks future square pieces.
  • Clear multiple regions at once to build combo score.

Tetris Sudoku FAQ

Is Tetris Sudoku the same as Blockudoku?

It is the same family of puzzle: place blocks on a 9x9 board and clear rows, columns, and 3x3 boxes. This page adds a Tetris mode with rotation for players who expect falling-block flexibility.

Can you rotate pieces?

Yes in Tetris mode. Switch to Classic mode if you want the stricter block Sudoku rule where every shape stays fixed.

Is this a numbered Sudoku puzzle?

No. It borrows Sudoku's 9x9 grid and 3x3 boxes, but the challenge is spatial planning instead of number deduction.