Dark Racing Kings ?
Checkered-Teleport ?

// rem ref to bordContainer --> rethink CSS design...

// TODO: Otage, Emergo, Pacosako : fonction "buildPiece(arg1, arg2)" returns HTML element with 2 SVG or SVG + number

add mode diagram --> use vchess rules (only english? only french?)
add variants : Chakart first (dark,cylinder)

Recycle : pawns fall out of board on 8th rank.
captureKing : property, == this.taking || this.options["dark"]