Soccer Is Harder than Football.

Jan Christensen, Anders Nicolai Knudsen, and Kim S. Larsen.
International Journal of Foundations of Computer Science, 26(4): 477-486, 2015.

It is known that deciding whether or not a team in a soccer tournament in progress can still win or, more generally, can obtain a certain position is NP-complete. We show that deciding whether or not a team is guaranteed a certain minimum position is coNP-complete. We also show that deciding with regards to goal difference, the standard tie-breaker for teams having the same number of points, whether or not a team can reach a certain position is NP-complete.

---

publication

Link to the publication at the publisher's site - subscription may be required.
Text required by the publisher (if any): The publication is available from WorldSciNet.

open access (138 KB)

The same as the publisher's version, when the publisher permits. Otherwise, the author's last version before the publisher's copyright; this is often exactly the same, but sometimes fonts, page numbers, figure numbers, etc. are different. It may also be a full version. However, it is safe to read this version, and at the same time cite the official version, as long as references to concrete locations, numbered theorems, etc. inside the article are avoided.

other publications

Other publications by the author.