Byplays assumes familiarity with this style, and concentrates on byplays: plays made during such a sequence which initiate a new threat while maintaining the coherence of the current sequence. Like most of Favisham's tactical innovations, the concept is somewhat abstract and difficult to grasp. The standard expository example – too well-known now to surprise modern players – is the use of Croxley? during a second-level encirclement of zone three as soon as the torsion coefficient has been raised above one, which initiates a co-rotating knid field in zone six.
Favisham exhausts simple byplays in the first three chapters (often published separately as a self-contained work, and there is a whole cottage industry of commentaries), and then proceeds to simultaneous sequences, where each move plays a role in two or more entirely independent strategic plans simultaneously, braided sequences, knotted sequences, and tangles. The diagrams therein are remarkably similar to those used by Richard Feynman (himself a distinguished amateur player) for analysing the interactions of fundamental physical particles. It is likely that more connections with modern physics remain to be discovered.