Suggestion: New Chess Variant (not sure about the name)

Somewhere on chess.com, someone said something about a variant where you can only go forward or sideways, never backwards. I played it with a friend otb, and it was the most fun two-player chess variant I ever played. There all sorts of new tactics, yet to be discovered. One I saw is where you sac a knight on f7/f2 (like in bughouse) and the king can never go back to safety. I think it would be really fun if chess.com could add this to the ways to play. Some questions to consider are: should you be able to check backwards (if your piece is really far forward, and the opposing king is a little too much forwards for their side), if you can't capture back? (My suggestion: no, you can't check back) What happens when you promote, can the new piece only move on the back row? (My suggestion: maybe it should be able to move once and continue from there, or maybe it should appear on the same file just on your first row, not the last.)

What do you think?

Sounds very interesting... but if it can go backwards once... couldn't a piece go from the 3rd rank (let's say enemy king on 2nd) to the 8th so that next move they can go back to 1st?

but the go backwards once rule is only for promoted pieces

What?

It won't be added into Chess.com, but that is a great variant, and I will be sure to play it!

We need horde chess

why not?

+100

Interesting idea. 

thanks