Strategies on Slither.io
Coiling refers to a strategy of completely encircling an opponent. As you continue moving, your coils constrict, making it difficult or impossible for an opponent to avoid hitting you. Moreover, any pellets inside can be eaten without another player interrupting. However, while executing this technique, you are vulnerable to a larger snake coming along and coiling around you! You may also find it profitable to coil around a snake attempting to coil a player if you are large enough to. Also, if you can't quite create a complete loop or before you do, it's possible for your intended victim to shoot out of the gap, blocking your path and killing you instead! A variation of coiling involves encircling pellets of already killed snake to prevent them from being eaten by others.
Cutting People Off
One of the most basic techniques in Slither.io is using a burst of speed to suddenly turn in front of another player, causing them to run into you and pop into a giant sea of pellets that you can grab. Even if you're much smaller than another player, it's still very possible to throw yourself in their path and kill them! If you notice someone near you suddenly put on a burst of speed, watch out! They may be preparing to try and cross your path just ahead of you.
This works best once you are longer. After getting a kill, instead of scooping up the remains yourself, you leave them and pretend that you aren't coming back. Make a wide loop back onto yourself and eventually someone will take the bait, and you can begin coiling them. Or you can coil in one place until other snakes arrive and see an opportunity to devour you. When a snake is in your reach, speed boosting and kill it. If you succeeded, you can return to the spot and wait for new victims.
When other snakes attempt to trap you, you can circle a bit ahead of your opponent to cut off their means of enclosing. If they back off but come back with a burst of speed, you can simply continue doing it. Grazing your opponent's body will not kill you; use this to your advantage, and continue pushing them off until they give up.
Shielding is a technique that revolves around going back and using your own tail as a shield from others. Shielding might be useful as an escape route, but you are vulnerable to larger snakes coiling you.
Moving around in a tight circle is often useful in crowded areas where there are lots of snakes and moving anywhere is risky. This strategy also works when being in between two snakes and there is a risk of one of the larger snakes or fourth snake taking advantage of the situation. Defensive circling should be done in crowded areas as such places make it hard for others to coil around the circling player.
Eating pellets from recently slain snakes without actively trying to kill them. The scavenging snakes will not attack and instead follow other snakes. When he sees the other snakes create a mass pool, he will swoop in and steal lots of mass before retreating. Scavenger snakes are often a temporary playstyle, and after this, they will most likely turn to more aggressive playstyle.
Tailing is when you follow a bigger snake in hopes of claiming pellets once they collide. Tailing is also used to chase down and grab the kill on larger snakes. Tailing as a smaller snake is very dangerous as most of the time, the snake that is getting tailed can retaliate by cutting paths or even coiling them.
Crunching refers to tactics consisting of wedging a player between two others. Often players will move parallel to a much larger player, trying to catch up to them and cut them off. If you are careful and are long enough, you can take this opportunity to move towards the larger snake, causing the player in the middle to run into you and die.