# Chess piece sets

These SVG piece sets are bundled from the lichess.org source repository
(lichess-org/lila, `public/piece/`, commit `08b36f79dd2e18427e4793e0259bf80c3e1bd234`)
so the board renders locally without fetching third-party assets at runtime.

Authors and licenses as listed in lila's `COPYING.md` (checked 2026-09-27):

| Set        | Author(s)                     | License        |
|------------|-------------------------------|----------------|
| cburnett   | Colin M.L. Burnett            | GPLv2+         |
| merida     | Armando Hernandez Marroquin   | GPLv2+         |
| chessnut   | Alexis Luengas                | Apache 2.0 — `public/piece/chessnut/LICENSE.txt`, from [LexLuengas/chessnut-pieces](https://github.com/LexLuengas/chessnut-pieces) |
| fantasy    | Maurizio Monge                | MIT — `public/piece/fantasy/LICENSE.txt`, from [maurimo/chess-art](https://github.com/maurimo/chess-art) |
| spatial    | Maurizio Monge                | MIT — `public/piece/spatial/LICENSE.txt`, same source as fantasy |
| celtic     | Maurizio Monge                | MIT — `public/piece/celtic/LICENSE.txt`, same source as fantasy |

See https://github.com/lichess-org/lila/blob/master/COPYING.md for the
authoritative source and full license details.

**LIC1 (docs/problemi/PROBLEMI.md), closed 2026-09-27:** the three
non-commercial sets (alpha — "free for personal non commercial use", Eric
Bentzen; staunty and fresca — CC BY-NC-SA 4.0, sadsnake1) were removed and
replaced with chessnut, fantasy, spatial and celtic above, all under licenses
that permit commercial use with attribution. `src/ui/store.tsx` migrates any
saved `pieceSet` value that isn't one of the six sets still bundled back to
the default (`cburnett`), so a user who had alpha/staunty/fresca selected
doesn't hit a broken board theme.