Antichess endgame study - RK vs K

Does anyone have a link to an antichess study for a Rook + King vs King endgame? I know it's winnable, 'cos I've lost enough games when down to just a king. But whenever I'm the one with two pieces, I can never make it work. Thanks!

RK vs K in antichess only seems winnable in very certain positions, which even then are difficult to calculate.
It seems that the only way to win is to somehow pin the opposing king against the back wall, which is ridiculously difficult to do, if not impossible, with a rook open for the king to go to.

Evidence:
lichess.org/analysis/antichess/4k3/8/8/4K3/6R1/8/8/8_w_-_-_0_1?color=white
lichess.org/analysis/antichess/4k3/8/8/8/8/3K4/6R1/8_w_-_-_0_1?color=white
lichess.org/analysis/antichess/4k3/8/1R6/K7/8/8/8/8_w_-_-_0_1?color=white
lichess.org/analysis/antichess/8/8/1R6/K7/3k4/8/8/8_w_-_-_0_1?color=white

Thanks, @InkyDarkBird ! After posting that, I found this - lichess.org/study/4XBZbCFY - chapters 60-63 in particular. Like you say, reliant on the king being pinned on the backwall, so either a blunder on the part of the King, or just bad luck with where the other pieces are when the pawn gets promoted. And even once on the wall, it's far from easy.

Not sure if that makes me feel better or worse about all the times I've lost when facing off against R+K...!!