Some examples are directed to a method for displaying, by a surgical controller on a display device, surgical guidance information based on at least one calculated value indicative of a compatibility, for together supporting a replacement ligament, of a first tunnel in a first bone of a joint and a candidate second tunnel in a second bone of the joint. Some examples are directed to a surgical controller configured to display the surgical guidance information. Some examples are directed to a method for displaying, by a surgical controller on a display device, surgical guidance information based on at least one calculated value indicative of a risk of convergence of a first tunnel in a first bone and a candidate second tunnel in the first bone. Some examples are directed to a surgical controller configured to display the surgical guidance information.