# Contest Runners

The reusable implementations live in `src/qibotn/backends/`.

- `qibotn.run_contest_tn_case`: quimb+torch TN search/contract cases.
- `qibotn.run_contest_mps_case`: Vidal/MPS contest expectation cases.
- `qibotn.run_vidal_mpi_contest_case`: direct Vidal MPI observable sweep.
- `qibotn.run_custom_tn_expectation`: custom quimb+torch TN cases.

`src/qibotn/backends/quimb.py` holds the TN helpers,
`src/qibotn/backends/qmatchatea.py` holds the qmatchatea MPS helpers,
and `src/qibotn/backends/vidal.py` holds the Vidal helpers.