17. Royapuram

All India Anna Dravida Munnetra Kazhagam held the seat; the winning margin narrowed from 19.0% to 6.6%.

• Won on a lower shareIts own vote share fell 12.7% — it held because the rest of the vote was more divided.
• Vote fragmentedThe top two took only 83.8% between them, down from 96.8% — the field split more ways.
• TurnoutTurnout fell 7.1% to 63.5%.

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