Blue or Red Pill? XXIII

Anyhoo, just in case today doesn't bring us four in a row, here's a little action to keep you going. A pair of positions based on diagrams that appear on the last page of Minev's A Practical Guide to Rook Endgames (he, by the way, says he got them from Levenfish & Smyslov), Black has the move in both cases, but there's only one draw.

So,