Combo

Combos are bonuses that exist in certain games which reward multiple line clears in quick succession. The exact conditions for triggering combos, and the amount of importance assigned to them, vary from game to game.

General strategy
By leaving two columns open, one can clear combos easily. However, an I tetromino cannot clear a line in this case, so the Hold box should contain a non I piece, if the game allows.

Games with combos in their rules

 * Magical Tetris Challenge
 * Tetris The Grand Master
 * Tetris The Absolute The Grand Master 2
 * Tetris The Absolute The Grand Master 2 PLUS
 * Tetris The Grand Master 3 Terror-Instinct
 * Demonstration: 1574 Hanabi in Easy Mode
 * Demonstration: Master M using a 2-cell-wide opening at the right
 * Cultris
 * Tetris Zone
 * Tetris Online (Japan) Called REN in the game.
 * Tetris Splash