It is a variant that are suited for strategic players. It has no powerful piece that moves like a queen in chess, and it has no piece that moves like a bishop in chess. The only strongest piece is a rook. This variant also suits players who like to play endings. This is probably the variant where a human can play toe to toe against an engine.
The major difference from chess is that the queen in this variant would move like a bishop but within 1 square only. And the bishop in this variant would move like a bishop but within 1 square only plus 1 move forward, this piece is like a silver general from shogi.
There are no castling and ep capture in this variant too. The pawns are initially placed in 3rd/6th ranks. See also the rules in game rules menu.
There are only 3 engines that I know that can play this variant namely, Silangan by Me, Sjaak by Evert and Fairy-Max by H.G.Muller, see also the engines menu.