1. Royapuram

Dravida Munnetra Kazhagam held the seat; the winning margin widened from 1.6% to 14.3%.

• Won on a lower shareIts own vote share fell 4.3% — it held because the rest of the vote was more divided.
• New challengerIndependent (IND) finished second with 31.6% — it polled just 0.4% in 1984.
• Vote fragmentedThe top two took only 77.6% between them, down from 98.9% — the field split more ways.

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