Nonogram Jigsaw

Numbers along each row and column tell you how many consecutive cells to fill, and a picture emerges once the logic works out - that's Nonogram Jigsaw in full, no more and no less. There's no guessing involved if you approach it properly, every square should be deducible from the clues, which is either satisfying or maddening depending on your patience for grid logic. Bigger grids take real concentration, since one wrong deduction early on throws off everything downstream.