Can you be sure to clear a line at Tetris?
Yes in &quot;Tetris Guidelines&quot;. In fact, greater feats can be accomplished in modern Tetris games, thanks to these strong guidelines.<p><a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=qmG0NcbrLTE" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=qmG0NcbrLTE</a><p>Strong players practice these loops all the time. Its possible thanks to the &quot;bag randomizer&quot;.<p>--------<p>The BT Cannon is a TSpin double (4 damage + B2B bonus) + TSpin Triple (6 damage + B2B bonus), for a total of 11 damage.<p>The DT-cannon followup is a TSpin Triple followed by TSpin Double for a total of 12 damage.<p>Finally, the Perfect Clear is 10 damage, for a total of 33 damage per loop.<p>--------<p>Other players practice triple-perfect clear starts, for 30-straight damage in some ~30 tetriminos dropped. But the BT-cannon + DT Cannon -&gt; Perfect clear setup is a beautiful arrangement.<p>The whole loop is carried out over 5 bags IIRC, or 35 pieces (5 bags * 7 pieces per bag == 35 sets of each piece). That&#x27;s enough for the 4x T-pieces needed for the BT-cannon + DT Cannon (which offer significant amounts of damage)<p>35 pieces * 4 pieces == 140 minos, or 14 lines (the Tetris board is exactly 10 pieces wide). Which lines up with not only a perfect bag loop (the 35th piece finishes the bag, meaning piece#36 is a new bag, allowing you to loop), but also divides perfectly with 140 minos aka 14 lines, meaning the perfect clear is possible.<p>------<p>Thanks to Tetris Guidelines bag randomizer, bag#6 is effectively the same situation as bag#1 (start of a new bag). So you loop the sequence and can continuously apply the BT-cannon &#x2F; DT-cannon &#x2F; perfect clear loop almost perpetually. In practice, its &quot;only&quot; a 90%+ chance of continuing each loop, but that&#x27;s a high enough probability to effectively use the technique in competitive games.<p>EDIT: The existence of the &quot;Hold Piece&quot;, in combination with the &quot;easy to count&quot; 7-bag randomizer, allows for some incredible feats in Tetris Guidelines that classic-Tetris players are unfamiliar with. Its a different game, more about quick-reaction speed and twitch reaction rather than the planning-centric classic-Tetris. But its these attributes that make Tetris-Guideline games better for player-vs-player setups. Practiced strategies are more reliable and less contingent on luck.