21... R(13,0)
I nearly typod 13,1... I wonder if you'd have let me take back or if you'd have yoinked the rook before could correct myself?
I don't really need to wait. I think it's around ten moves with best play. Then again I might have missed a way for you to hold me off, we'll see.
22... Hx(8,1)+
(P) (2, 2) => (2, 3)