Star Pool Chess

A King can move or capture to any adjacent square, but never to a square where it can be captured. 

When making its first move and not in check, the King may leap like a Knight. This move can capture.

The King may also move or capture orthogonally across the Star Pool as if it were not there.

Or, the King may move or capture diagonally across the Star Pool as if it were not there, or to the corresponding citadel.

The King may also move or capture orthogonally from citadel to citadel or one square diagonally out of a citadel.

The player that checkmates the opponent's King wins the game.

A General moves or captures any number of squares orthogonally on a  rank or a file, or takes a single diagonal step. It may not leap over other pieces. 

This piece originates in Shogi, where it is known as a or Ryu-O, and is the promoted form of a Rook. In Star Pool Chess, the Lieutenant promotes to a General if it reaches the opposing side's back rank or citadels. 

The General may also move or capture orthogonally across the Star Pool as if it were not there.

Or, the General may move or capture diagonally one square across the Star Pool as if it were not there, or to the corresponding citadel.

The General may also move or capture orthogonally from citadel to citadel or one square diagonally out of a citadel.

The Captain moves any number of squares on a diagonal, or may step one space orthogonally. It may not leap over other pieces. 

This piece originates in Shogi, where it is known as a Ryuha, and is the promoted form of a Bishop. In Star Pool Chess, the Sergeant promotes to a Captain if it reaches the opposing side's back rank or citadels. A Pawn also promotes to a Captain upon reaching the opposing sides citadels by jumping across the Star Pool. 

The Captain may also move orthogonally one square across the Star Pool as if it were not there.

Or, the Captain may move or capture diagonally any number of squares across the Star Pool as if it were not there, or to the corresponding citadel.

The Captain may also move or capture orthogonally from citadel to citadel or any number of squares square diagonally out of a citadel or to the citadel diagonally across.

The Great-Elephant steps one square diagonally or forward or jumps two squares diagonally or forward. 

The Great-Elephant may also move or capture orthogonally across the Star Pool as if it were not there.

Or, the Great-Elephant may move or capture diagonally across the Star Pool as if it were not there, or to the corresponding citadel.

The Great-Elephant may also move or capture orthogonally from citadel to citadel, but only in the forward direction, or diagonally out of a citadel.

A Knight moves first one square orthogonally then one square diagonally outward. Unlike in orthodox Chess, the order is important because it affects the influence of the Star Pool. The Knight hops over any pieces on the way. 

If crossing the Star Pool when making the diagonal part of its move, the Knight may move or capture diagonally across the Star Pool as if it were not there, or to the corresponding citadel.

If crossing the Star Pool when making the orthogonal part of its move, The Knight may also move orthogonally across the Star Pool as if it were not there. 

Note that if the Knight is in a citadel, it jumps over the non-board to reach the board. The Knight may not move from citadel to citadel.

A Rook moves any number of squares orthogonally on a rank or a file. It may not leap over other pieces. 

The Rook may also move or capture orthogonally across the Star Pool as if it were not there. 

The Rook has no way to reach the citadels by its own movement. However, if the Wizard swaps its place with the Rook, the Rook is placed in a citadel. Once in a citadel, the Rook may move and capture orthogonally from citadel to citadel. But, it cannot leave the citadels until swapped again by a Wizard!

The Wizard is classified as a leaper. It can move one square diagonally in all four directions. Or, like an exaggerated Knight move, the Wizard can jump two squares horizontally or vertically and then one square diagonally outward. 

The Wizard has a special power to swap positions with any adjacent friendly piece. 

The Wizard, except for its special swap move, is a piece borrowed from Omega Chess.

Note that if the Wizard is in a citadel, it jumps over the non-board to reach the board. The Wizard cannot move from citadel to citadel.

If crossing the Star Pool when making the orthogonal part of its leap move, The Wizard may also move orthogonally across the Star Pool as if it were not there.

If crossing the Star Pool when making the diagonal part of its leap move, the Wizard may move or capture diagonally across the Star Pool as if it were not there, or to the corresponding citadel.

When making its one square diagonal move, the Wizard may also move or capture diagonally across the Star Pool as if it were not there, or to the corresponding citadel.

A Pawn can move straight ahead one square. A Pawn captures by moving one square ahead and diagonally. 

If a Pawn reaches the rank on which the opposing Pawns started (the 6th for white, the 3rd for black) it promotes to a Sergeant. Note that Sergeants are not included in the initial board setup. They only come into play through Pawn promotion. If a Pawn reaches an opposing citadel by jumping across the Star Pool, it promotes to a Captain.

The end pawns may move two squares forward on their first move.

The Pawn may also move orthogonally across the Star Pool as if it were not there. 

Or, the Pawn may capture diagonally one square across the Star Pool as if it were not there, or to the corresponding citadel.

A Sergeant moves one square diagonally. The Sergeant has the capabilities of the ancient Ferz. 

The Sergeant may move and capture across the Star Pool as if it were not there, or to the corresponding citadel. 

If it reaches the opposing side's back rank or citadels, it promotes into a Captain. 

If a Pawn reaches the rank on which the opposing Pawns started (the 6th for white, the 3rd for black), or if it reaches a citadel, it promotes to a Sergeant. Note that Sergeants are not included in the initial board setup. They only come into play through Pawn promotion.

A Lieutenant moves one square left, right up or down. It may not leap over other pieces. The Lieutenant has the same movement as the ancient Wazir. 

If it reaches the opposing side's back rank or citadels, it promotes into a General. 

The Lieutenant may also move or capture orthogonally across the Star Pool as if it were not there. 

Like the Rook, the Lieutenant has no way to reach the citadels by its own movement. However, if the Wizard swaps its place with a Lieutenant, the Lieutenant is placed in a citadel. If this is the case, the Lieutenant may move and capture orthogonally from citadel to citadel. But, it cannot leave the citadels until swapped again by a Wizard!