Chesquerque

Chesquerque is a chess variant invented by George R. Dekle Sr. in 1986. The game is played on a board composed of four Alquerque boards combined into a square. Like Alquerque, pieces are positioned on points of intersection and make their moves along marked lines (similarly to xiangqi); as such, the board comprises a 9×9 grid with 81 positions (points) that pieces can move to.
Chesquerque was included in "World Game Review" No. 10 edited by Michael Keller.
Game rules.
The dimensions of the board are 9 rows by 9 columns. All the standard chess pieces are present, plus one additional pawn and one archbishop fairy piece per side. The pieces move in ways specially adapted to the Alquerque-gridded board; these moves differ slightly from those in regular chess.
The starting setup is shown above. Like in standard chess, White moves first and the objective of the game is to checkmate the opponent's king. Other standard chess conventions also apply.
Piece moves.
Each chesquerque piece has two different sets of possible valid moves, depending on whether said piece is standing on a point that has "one or more" diagonal connections ("with diagonals") or one that has "no" diagonal connections ("without diagonals"). In general pieces cannot move diagonally from points without diagonal markings.
References.
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