164. Kilvelur

Communist Party of India (Marxist) held the seat; the winning margin narrowed from 11.9% to 1.5%.

• Won on a lower shareIts own vote share fell 10.5% — it held because the rest of the vote was more divided.
• New challengerTamilaga Vettri Kazhagam (TVK) finished second with 35.5% — it did not contest here in 2021.
• Vote fragmentedThe top two took only 72.5% between them, down from 83.2% — the field split more ways.

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