-Recycle : pawns fall out of board on 8th rank.
-captureKing : property, == this.taking || this.options["dark"]
+Otage, Emergo, Pacosako : fonction "buildPiece(arg1, arg2)" returns HTML element with 2 SVG or SVG + number
+réfléchir aux animations par variante (reversi, Chakart, Atomic, ...)