Build a custom back rank over a best-of-five match, then play the position out.
Open a fresh match as Player 1 and begin drafting your back rank. Invite an opponent whenever you're ready.
Create a private room and copy the Player 2 invite link. You each draft from your own device, king first.
Spend your piece budget across 8 squares — your call.
Place your king first; you and your rival take turns and respond to each other's pieces.
Full rules — check, mate, castling, promotion. Colors swap each round.