Linked from
The 12 pages that link to Combinatorial game theory, each with the reason it gives.
Turn-based strategyRelated: It analyzes a clean mathematical model of alternating strategic play.
NimNarrower topic: Nim is a foundational example in this field.
MancalaRelated: Many mancala variants can be analyzed as deterministic games of alternating choice.
Richard K. GuyNarrower topic: Guy helped establish this field through research and exposition.