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Opener Practice Tool

An opener is a planned sequence of piece placements for the first bag or two of a game, designed to set up early attacks such as T-Spins, Tetrises, or Perfect Clears. Learning an opener gives you a familiar setup to aim for at the start of a game instead of improvising your first few pieces. Practice it until you can build it without the placement hints.

The Blox opener practice tool lets you practice any of the 148 openers available, from classics like TKI, DT Cannon, PCO, C4W, and Mr. T-Spin's STD to obscure meme setups. The chosen opener's piece placements are shown directly on the board while you play, with its source document alongside, so you can learn the exact placements and piece order.

What you can do here

  • Search the library by category: T-Spin, Perfect Clear, 4-wide, competitive, beginner, stacks, and more.
  • Practice variations of any opener and cycle through their different branches.
  • Mirror any setup to learn both orientations.
  • Hide Opener to see which setups you can reproduce on demand in real games.
  • Repeat attempts automatically with Reset on finish and Reset on fault.
  • Set a seed to replay the exact same bags and dig into a specific pattern.
  • PC Practice to skip the opener and drill only the ending Perfect Clear.

Getting started

  1. Open the practice client and pick an opener from the Choose Opener search.
  2. Watch the highlighted placements on the board and match them piece by piece.
  3. Use Reset on fault so that whenever you misdrop a piece, you will start over again instantly.
  4. Once comfortable, Hide Opener and build the opener from memory.
  5. Try out the opener in a multiplayer game.