Kingsman is the Blackmoor equivalent to chess, or go. The board consists of a twenty-five square by twenty-five square grid checked off in two different alternating colors. Each side has a fifty-piece “army,” with each piece or pair of pieces having its own movement and attack patterns. The game ends when either all the pieces are captured (called a rout), or when one army outmaneuvers the other, either leaving only openings that would mean the pieces are captured (being in check), or outright blocking all the available moves (being check-mated). Capturing the Kingsman’s piece is automatic victory (called a (capital-C) Capture), is the shortest way to win, but is also the most difficult of victories to obtain.
Noblemen of the Thonian Empire would frequently make wagers, with each having to give up gold, or lands, or slaves with the capture of pieces from the board. In more than one occasion, marriages were determined by victories. It is said that Leansethar's terms of marriage were that her suitor had to defeat Rowena at Kingsman by all victory methods (route, check, check-mate, capture) in four consecutive games.
The only known instance of any victory against Rowena was by the Great Svenny, who won by Capture in an otherwise rout-oriented game in 1020 UC. The match took seven months to complete, and Svenny had only three pieces left in play.
Rowena subsequently challenged him to an alternate version of the game, played on a hex grid, with her single Kingsman surrounded by 150 pieces of Svenny's choosing. That game took three years to play out, and Uther's daughter won by rout. Unfortunately, there is no record of the moves used. It took the bank of fifty difference engines working in tandem twelve years to come up with but a single iteration, in the Last Days.
Needless to say, Leansethar never took a husband.