21. Gobindganj

Indian National Congress held the seat; the winning margin narrowed from 11.6% to 1.9%.

Boundaries were redrawn between 1962 and 1967 — the comparison is matched by name and is indicative only.

• Won on a lower shareIts own vote share fell 15.6% — it held because the rest of the vote was more divided.
• New challengerBharatiya Jana Sangh (BJS) finished second with 30.8% — it did not contest here in 1962.
• Vote fragmentedThe top two took only 63.4% between them, down from 84.8% — the field split more ways.

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