10. Mehgaon

Indian National Congress held the seat; the winning margin narrowed from 2.4% to 0.7%.

• Won on a lower shareIts own vote share fell 12.1% — it held because the rest of the vote was more divided.
• New challengerIndependent (IND) finished second with 22.3% — it polled just 1.5% in 1985.
• Vote fragmentedThe top two took only 45.3% between them, down from 67.8% — the field split more ways.

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