2 Pieces start in an undefined (and unusable) state,
3 pictured by a question mark.
4 At first move, click on a square for the king.
8 Define a piece by dragging a reserve piece onto a question mark,
9 and then move it on the board.
13 Once all pieces of some color have been defined,
14 all pieces on board return to undefined state.
17 <a href=
"https://www.bario-chess-checkers-chessphotography-spaceart.de/">
18 Complete rules description.
21 <p class=
"author">Panos Louridas (
1985).
</p>