365. Arakkonam

Dravida Munnetra Kazhagam held the seat; the winning margin narrowed from 27.9% to 26.3%.

• Won on a lower shareIts own vote share fell 8.7% — it held because the rest of the vote was more divided.
• New challengerAll India Anna Dravida Munnetra Kazhagam (AIADMK) finished second with 22.1% — it did not contest here in 2019.
• Vote fragmentedThe top two took only 70.4% between them, down from 86.2% — the field split more ways.

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