Parlor Puzzle, 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
The 10 in the top-right is the biggest piece on the board and, with the wide 3 in the bottom-left, one of only two patches fixed from the start. It takes a 2x5 block down the right side, and under it a 6 spans the entire bottom row. The rest is columns, a tall 5, a tall 3 and a 2x3 six, with a wide 3 capping them along the top.