277. Dhanbad

Indian National Congress held the seat; the winning margin narrowed from 39.5% to 3.0%.

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 14.8% — it held because the rest of the vote was more divided.
• Runner-up changedSecond place passed from Swatantra Party (SWA) to Communist Party of India (CPI).
• Vote consolidatedThe top two candidates took 67.9% of the vote between them, up from 61.1% — a tighter two-way contest.

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