|All clear bonus||+30 Nuisance Puyo sent on your next chain|
The Tsu rule is the name of the game mode introduced and heavily utilized in Puyo Puyo Tsu. It brought many improvements over the standard rule used in Puyo Puyo, with the most notable ones being offsetting and All Clears.
In Puyo Puyo Fever and Puyo Puyo Fever 2, this rule is called Classic, as the Fever rule is the default rule used in said games. In Puyo Puyo! 15th Anniversary, Puyo Puyo 7, and Puyo Puyo!! 20th Anniversary this rule is called Puyo Puyo Tsu (Puyo Puyo 2 in English translations), not to be confused with the game of the same name.
To this day, the Tsu rule is widely considered the standard for Puyo Puyo matches, and has been present in every Puyo Puyo game since.
The basic idea of a match under Tsu rules is the same as under original Puyo Puyo rules, in that you want the opponent to fill up their third column and lose.
Main article: Offset rule
A major addition to Tsu rule that was absent in the original Puyo Puyo rule is the addition of offsetting. Under the original Puyo Puyo rules, all a player had to do was create a 5 chain in order to guarantee that their opponent would lose. Under Tsu rules, creating chains now first counters Nuisance Puyo in the player's nuisance tray before sending Nuisance Puyo to the player's opponent.
Main article: All Clear
Another major addition to the Tsu rule is the concept of All Clears. An All Clear is a reward that the player receives from clearing all Puyo, including Nuisance Puyo and their variants from their field. In Tsu rules, the reward is that the player will send 30 extra Nuisance Puyo on their next chain. In some games the amount of Nuisance Puyo sent from an All Clear can be adjusted.
Main article: Margin time
A less important addition to the Tsu rule is the concept of margin time, with the intention of preventing matches from lasting too long. Margin time states how long it will take before the target points start to decrease, having the effect of each chain sending more Nuisance Puyo. At it's most extreme level, it can allow a player to send at least 40 Nuisance Puyo from just a 1 chain.
The difficulty level effects how many colors the player will receive and how many Nuisance Puyo they will start out with on their field.
- Very Easy
- The player plays with 3 colors.
- The player plays with 3 colors and starts out with 2 rows of Nuisance Puyo.
- The player plays with 4 colors.
- The player plays with 5 colors.
- Very Hard
- The player plays with 5 colors and starts out with 2 rows of Nuisance Puyo. The player's Puyo also falls slightly faster.