165. Vedaranyam

All India Anna Dravida Munnetra Kazhagam held the seat; the winning margin narrowed from 7.8% to 4.5%.

• Won on a lower shareIts own vote share fell 13.3% — it held because the rest of the vote was more divided.
• Vote fragmentedThe top two took only 68.4% between them, down from 91.8% — the field split more ways.

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