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