Chesquerque (1986)

A chess variant played on a quadruple Alquerque board (9×9, similar to Dablo Aasele). Each player has 18 pieces — the usual chess pieces plus a ninth pawn and an archbishop, which moves as a combined bishop and knight. The moves of the pieces are slightly adapted for the Alquerque grid: bishops and other diagonal-moving pieces can only move along grid lines; and knights are treated as moving two steps (one orthogonal, one diagonal) along grid lines and, like Chinese chess knights, cannot jump over an intervening piece. As in chess, the object is to checkmate the opponent's king. —user summary