====== Resolution ======

  - Take the value of the Attribute
  - Modify with the value of the Skill
  - Modify with any circumstance modifiers assigned but the Guide
  - Modify with the value of a 2d6 - 2d6 dice roll

This results in Degree of Success from -10 to 0 to +10.

A result of 0 to +10 is a Success.

A result of -10 to -1 is not a Success.