Each player only owns the King, the Queen and his 8 pawns. Each other piece is divided in shares. The knight has 4 shares, the bishop has 8 shares and the rook has also 8 shares. If the knight is of the opposite color, the set of movements is reversed. For each share, the player can move one square in the piece typical direction.
Options protect an investor from unfavourable fluctuations in price.
He usually borrows the shares from his stockbroker, promising to replace them at a future date, hoping that the price will fall by then. If the price falls, he buys the shares at the lower rate, and makes a profit on the difference. If the price has risen on the other hand, he has to buy the shares at the higher price, and sustains a loss. To introduce these ideas, there must be a way to give a dynamical value for each resource in question. In the beggining, each player has 60 zorkmids and an extra of 10 zkd for each 3 turns.