Garden Ladder, a 6x6 Patches puzzle
Arrow keys move. Enter starts a rectangle; arrows resize it; Enter places it. Escape cancels. Delete removes a patch. Control or Command Z undoes.
About this board
Four patches are fixed before you start: the 5 in the top-right corner drops down the right edge, the tall 6 beside it fills a 2x3 block, and the 5 and 2 in the bottom-left lie flat. From there the board reads like a ladder: two long rungs across rows four and five, three blocks above them, and a 4 that finishes the bottom row.