163. Andimadam

All India Anna Dravida Munnetra Kazhagam held the seat; the winning margin narrowed from 22.7% to 1.0%.

• Won on a lower shareIts own vote share fell 6.0% — it held because the rest of the vote was more divided.
• Vote consolidatedThe top two candidates took 100.0% of the vote between them, up from 90.2% — a tighter two-way contest.

Written from the constituency figures by a fixed set of rules — no language model.