LogicSudoku

Fill the 9 by 9 grid so no digit repeats.

Puzzles

Unofficial fan site, not affiliated with the BBC.

Chess pieces by Colin M.L. Burnett (cburnett), licensed CC BY-SA 3.0, via Wikimedia Commons.

Font credits: Josefin Sans, Jost, Dancing Script, Barlow Semi Condensed, Caveat Brush and JetBrains Mono, under the SIL Open Font License.