Kevin Pacey wrote on Wed, Jan 25, 2023 03:16 PM UTC:
The inventor of Janus Chess possibly wanted more than one difference in piece placement (and BN piece name, besides getting rid of the RN piece) for his CV's setup from that of the final version of Capablanca Chess, else he might have preferred to choose the setup of Stone's Chess, too.
Still, Janus Chess seems to be playable, despite the undefended pawns in that CV's setup, as extensive playtesting seems to have shown (some chess grandmasters have played it and Korchnoi even declared liking it, to let him be more creative than when playing chess, this CVP site's Janus rules page notes).
I don't doubt Stone's Chess would be a fully playable alternative setup.
The inventor of Janus Chess possibly wanted more than one difference in piece placement (and BN piece name, besides getting rid of the RN piece) for his CV's setup from that of the final version of Capablanca Chess, else he might have preferred to choose the setup of Stone's Chess, too.
Still, Janus Chess seems to be playable, despite the undefended pawns in that CV's setup, as extensive playtesting seems to have shown (some chess grandmasters have played it and Korchnoi even declared liking it, to let him be more creative than when playing chess, this CVP site's Janus rules page notes).
I don't doubt Stone's Chess would be a fully playable alternative setup.