20. Gobindganj

Indian National Congress held the seat; the winning margin narrowed from 21.3% to 5.2%.

• Won on a lower shareIts own vote share fell 12.6% — it held because the rest of the vote was more divided.
• New challengerCommunist Party of India (Marxist) (CPM) finished second with 42.2% — it did not contest here in 1977.
• Vote fragmentedThe top two took only 89.6% between them, down from 98.8% — the field split more ways.

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