-Animate castle by both movements (and generalize? match vanishes with appears?)
-
add variants :
Dark Racing Kings ? Checkered-Teleport ?
Hmm... non ? -->
Otage, Emergo, Pacosako : fonction "buildPiece(arg1, arg2)" returns HTML element with 2 SVG or SVG + number
+==> plus simple : deux classes, images superposées.