11. Nettapakkam

Indian National Congress held the seat; the winning margin narrowed from 45.9% to 31.2%.

• Won on a lower shareIts own vote share fell 17.6% — it held because the rest of the vote was more divided.
• Vote fragmentedThe top two took only 79.4% between them, down from 100.0% — the field split more ways.

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