521. Mathurapur

All India Trinamool Congress held the seat; the winning margin narrowed from 12.4% to 10.9%.

• Won on a lower shareIts own vote share fell 4.4% — it held because the rest of the vote was more divided.
• Vote fragmentedThe top two took only 88.3% between them, down from 95.5% — the field split more ways.

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