Jester rules 3-D chess

A chess-based game system for play by two players, comprising,

• (a) a gameboard comprising a checkered eleven-by-eleven grid of 121 spaces including a center space designated as a jester's portal;
• (b) a first multi-tiered castle occupying six of the spaces at a first corner of the gameboard, including a first elevated corner space forming a highest tier of the first castle, two elevated edge spaces adjacent to the first corner space on a first side of the first corner space, two elevated edge spaces adjacent to the first corner space on a second side of the first corner space, and a central space diagonally adjacent to the first corner space, wherein the first castle further comprises a first portcullis configured to guard the central space of the first castle;
• (c) a second multi-tiered castle occupying six of the spaces at a second corner of the gameboard diagonally opposite the first corner, including a second elevated corner space forming a highest tier of the second castle, two elevated edge spaces adjacent to the second corner space on a first side of the second corner space, two elevated edge spaces adjacent to the second corner space on a second side of the second corner space, and a central space diagonally adjacent to the second corner space, wherein the second castle further comprises a second portcullis configured to guard the central space of the second castle;
• (d) a first treasure piece located in the central space of the first castle and guarded by the first portcullis;
• (e) a second treasure piece located in the central space of the second castle and guarded by the second portcullis;
• (f) a set of first player game pieces comprising a king, a queen, two bishops, two knights, two rooks, eight pawns, and a jester piece;
• and
• (g) a set of second player game pieces comprising a king, a queen, two bishops, two knights, two rooks, eight pawns, and a jester piece.