layout: Set to horizontal or vertical.
height: Set to auto or a specific pixel number.
showMoves: Set to figurine, text, puzzle, or hidden.
initialGame: Set to first, last, random, or a specific game number.
initialVariation: Set to a specific variation number.
initialHalfmove: Set to start, end, random, comment, or a specific move number.
autoplayMode: Set to game, loop, or none