83. Yercaud

All India Anna Dravida Munnetra Kazhagam held the seat; the winning margin narrowed from 20.9% to 7.8%.

• Won on a lower shareIts own vote share fell 12.9% — it held because the rest of the vote was more divided.
• Vote fragmentedThe top two took only 82.6% between them, down from 95.2% — the field split more ways.

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