83. Yercaud

All India Anna Dravida Munnetra Kazhagam held the seat; the winning margin narrowed from 10.9% to 0.9%.

• Won on a lower shareIts own vote share fell 16.3% — it held because the rest of the vote was more divided.
• New challengerTamilaga Vettri Kazhagam (TVK) finished second with 33.7% — it did not contest here in 2021.
• Vote fragmentedThe top two took only 68.4% between them, down from 90.9% — the field split more ways.

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