Keys "s"=save "l"=load "b"=back once
Yakov Brusky, 1966. Pawns capture forward on like-colored hexes, move forward without capturing to different-colored hexes. If an enemy (not an ally) blocks one forward non-capturing pawn move, the other is prohibited. I did not know how this affected initial double moves, so I did not implement them. For now, pawns promote only to queens.
These are simple illustrations rather than strong opponents.
Bug reports? -- Thank you! Keep them coming!