House with Chimaeras
Due to the steep slope on which the building is situated, it had to be specially designed out of concrete to fit into its foundations correctly. From the front, the building appears to have only three floors. However, from the rear, all of its six floors can be seen. One part of the building's foundation was made of concrete piles, and the other as a continuous foundation. Usually, these two approaches do not mix well but Horodecki somehow succeeded in overcoming this technical problem.
House in the Woods
The cards on the tableau are built either up or down by suit; the player can have the cards go both directions at the same pile. However, an ace cannot be placed on a king and vice versa; an ace should be transferred to the foundations. Furthermore, when a pile becomes empty, it cannot be filled. All eight foundations are built up in suit starting from aces.