Keys "s"=save "l"=load "b"=back once
Regional variant from Tula, Russia. Pieces use their own moves on files d and e, moves as rooks on a and h, knights an b and g, bishops on c and f. Kings and pawns are unaffected. Pawns promote to the file piece, or queen on file e.
These are simple illustrations rather than strong opponents.
Bug reports? -- Thank you! Keep them coming!