Tetris Guideline

The Tetris guideline is the current specification The Tetris Company enforces for making all new Tetris games alike in form.

Current rules include:

• 22x10 cell playing field
• Tetromino colors
  • Cyan I
  • Yellow O
  • Purple T
  • Green S
  • Red Z
  • Blue J
  • Orange L
• Tetromino spawn locations
  • The I and O spawn in the middle columns
  • The rest spawn in the left-middle columns
  • The tetrominoes spawn horizontally and right-side up.