Move sounds. Only the set published on the admin page plays for visitors.

wood                Wooden board
  move, capture, castle   el_boss, "Chess Puzzle Blitz SFX", CC0 1.0
                          https://freesound.org/people/el_boss/sounds/546119/
                          https://freesound.org/people/el_boss/sounds/546120/
                          https://freesound.org/people/el_boss/sounds/546118/
  check, promote, gameEnd  Kenney, "Interface Sounds" (glass_002, confirmation_001,
                          confirmation_002), CC0 1.0, https://kenney.nl/assets/interface-sounds

kenney              Kenney, CC0 1.0, converted from OGG to MP3
  move, capture, check, castle  "Impact Sounds" (impactWood_light_000, impactWood_medium_000,
                          impactBell_heavy_004, footstep_wood_000), https://kenney.nl/assets/impact-sounds
  promote, gameEnd       "Interface Sounds" (maximize_001, confirmation_002),
                          https://kenney.nl/assets/interface-sounds

lichess-sfx         Enigmahack, from Lichess (https://github.com/lichess-org/lila,
lichess-futuristic  public/sound/sfx, futuristic and piano: Move, Capture, Check, GenericNotify),
lichess-piano       GNU AGPLv3 or later (see AGPL-3.0.txt), unmodified.
                    Source: https://github.com/lichess-org/lila/tree/master/public/sound

CC0 1.0: https://creativecommons.org/publicdomain/zero/1.0/