If a rule entitled Shivving exists, repeal it.

Add a new rule to the ruleset, entitled Shivving:

Each Prisoner has a Standard Heuristic for Inmate Violence (SHIV) score, which is a non-negative integer number with the maximum of 99. It is tracked in the GNDT and defaults to zero. Each Prisoner’s SHIV score represents how unpopular they are within the Prison, and how likely they are to be the subject of violence.

As a daily action, each Prisoner may Walk the Yard by rolling DICE100 in the GNDT. If the result is lower than their SHIV score, they must reduce their Sentence by half (rounded up), set their SHIV score to 10, and set their Attitude to Injured.

Change the rule entitled Attitudes so that it reads as follows:

Each Prisoner has an Attitude, which may be either Withdrawn, Rebellious, Comfortable, Converted or Injured (defaulting to Withdrawn) and is tracked in the GNDT. The Warden’s Attitude can be only Converted or Injured, defaulting to Converted.

As a weekly action, a Prisoner may change their own Attitude, provided that their Attitude is not currently Injured.

Change the first sentence of the rule called Confessions to read as follows:

As a daily action, a Prisoner may confess to a Crime by increasing their SHIV score by 2, and then posting a blog entry to this effect, with “Crime:” in its title and naming a single other Prisoner as the Crime’s Accomplice in its body.

Change the bulleted list in the same rule to read as follows:

* If the Suspect and Accomplice both Cooperated, each has their Sentence increased by 1 year and their SHIV score increased by 3.
* If the Suspect Cooperated and the Accomplice Defected, the Suspect has their Sentence increased by 3 years and the Accomplice has their SHIV score increased by 2.
* If the Suspect Defected and the Accomplice Cooperated, the Accomplice has their Sentence increased by 3 years and the Suspect has their SHIV score increased by 2.
* If the Suspect and Accomplice both Defected, each has their Sentence increased by 2 years.

If in the rule called Rumours there is the following sentence, remove it:

Any Fish named within a Rumour may, within 24 hours of the posting of the Rumour, increase the SHIV of the Prisoner who posted the Rumour by 2.

Add the following to the end of the rule called Rumours:

Any Fish named within a Rumour may, within 24 hours of the posting of the Rumour, increase the SHIV of the Prisoner who posted the Rumour by 2, if they have not already done this for this Rumour.

Repeal the rule called Grudges, if it exists.

Reword the rule called The Don to read as follows:

The Prisoner with the greatest Sentence is known as the Don.

When The Don Confesses to a Crime, they may increase their SHIV by 4 and name another Prisoner to be the Suspect rather than themselves. Whenever the Don ceases to be the Don, they may once increase their SHIV by 10.