When you play tetris, do you usually leaving a single vertical space on one of the sides for sliding in the long 4 square to get a Tetris(4 rows at once)? I know that I do that. I tend to keep it on the left side myself. Which side do you prefer to keep open? Do you have any specific strategy to playing it? Any favourite versions? I always like to make sure I never get a 1 wide and 3 tall space in the mix. Theres only one piece that can fit in there and it's so rare. a 1 wide by 2 tall space is easier to fill but still rare. I like to leave lots of single spaces though, because those are the easiest to fill. The blocks I hate most are the square ones. I always get them when I don't have a 2 wide space available. So lets hear about your tetris strategies.