Kevin Pacey wrote on Sun, Dec 15, 2019 12:31 AM UTC:
From an old game log of this variant, in which Alexander Trotter was one of the players:
'...the pieces on the c and j files [are] couriers [that] jump to the second square in any direction [i.e. orthogonal or diagonal]... The ferz' [if previously unmoved] have the option of moving, just once, like a courier [called 'Courier leap']. One other rule is that the king can also move, once in a game, two squares in a turn like a knight or courier.'
Regarding the last sentence, I (Kevin Pacey) would assume that a king has to be previously unmoved to perform a king's leap, and that said king cannot be in check.
From an old game log of this variant, in which Alexander Trotter was one of the players:
'...the pieces on the c and j files [are] couriers [that] jump to the second square in any direction [i.e. orthogonal or diagonal]... The ferz' [if previously unmoved] have the option of moving, just once, like a courier [called 'Courier leap']. One other rule is that the king can also move, once in a game, two squares in a turn like a knight or courier.'
Regarding the last sentence, I (Kevin Pacey) would assume that a king has to be previously unmoved to perform a king's leap, and that said king cannot be in check.