140. Mahasamund

Indian National Congress held the seat; the winning margin narrowed from 13.5% to 12.6%.

• Won on a lower shareIts own vote share fell 15.2% — it held because the rest of the vote was more divided.
• New challengerJanata Party (JNP) finished second with 20.1% — it polled just 0.3% in 1980.
• Vote fragmentedThe top two took only 52.7% between them, down from 82.1% — the field split more ways.

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