Thick bars divide the grid into sections. The glowing cell's horizontal section is only one cell long, so it must be a 1. Press 1.

This cell's horizontal section is one cell long, so it can only be a 1.

Every cell is in a horizontal and a vertical section, and can never hold a number bigger than the shorter one. This vertical section is a single cell, so only 1 fits.

The shortest section sets the limit. This vertical section is one cell long, so only 1 fits.

Now use both sections together. The horizontal section already has a 1 and a 4. The vertical section already has a 3. Only 2 is left.

Cross off 1 and 4 from the horizontal section, and 3 from the vertical section. What is left?

Same idea here. The vertical section already has 2 and 3. The horizontal section is only 3 cells long, so nothing above 3 fits. That leaves 1.

The vertical section has 2 and 3, and the horizontal section caps this cell at 3. Only 1 works.

A section with one empty cell is easy. This horizontal section already has 1, 2 and 4. Press the missing number.

The horizontal section needs 1, 2, 3 and 4. Which one is missing?

Finish this vertical section the same way. It already has 1, 2 and 3.

The vertical section needs 1 to 4, and only one number is missing.

This horizontal section still needs a 4. The two cells on the left have vertical sections too short for it, and the right cell's already has a 4. Press 4 in the glowing cell.

Big numbers have few homes. Find the one cell in this section that can still take a 4.

Sometimes you can't tell yet. That's what Notes are for. Tap the Notes button.

This cell's vertical section is 2 cells long, so it is a 1 or a 2, but we can't tell which yet. Pencil in both: press 1, then 2.

Only 1 and 2 fit in a 2 cell vertical section. Pencil in exactly those.

The top row needs 1 to 6. Where does the 4 go? The 2nd to 4th cells have vertical sections too short for it, and the last two already have a 4. That leaves the first cell.

A 4 is too big for the 2nd, 3rd and 4th cells, and the two right-most cells already have a 4 in their vertical sections. Only one cell is left.

Same scan for the 5. Its vertical section can't repeat a 5 that's already lower down, so only one cell works.

One vertical section already has a 5 further down, so only one cell in the row can take it.

Last one: the 6. Again, the 2nd to 4th cells have vertical sections too short for a 6. That leaves the selected cell. Press 6.

Only one cell in the top row has a vertical section long enough for a 6.

That's everything you need to know. The rest of the puzzle is for you to solve. There is always a cell you can figure out. If you get stuck, tap Hint.

Perfect! You finished the whole puzzle.

Tap the glowing cell first.

Not quite. Check the highlighted sections.

Turn Notes back on first.

Feeling stuck? Tap the Hint button.

That number doesn't fit. Check this cell's horizontal and vertical sections, then erase or overwrite it.

This number doesn't work out. Erase it and try something else.

The highlighted cell has to be 6.

Its horizontal section is 4 cells long, so only 1 to 4 can fit. 1 and 2 are already in its horizontal section, and 3 in its vertical one. What's left? Tap Hint again for the answer.

Its horizontal section is 4 cells long, so only 1 to 4 can fit. 1 and 3 are already in its horizontal section, and 2 in its vertical one. What's left? Tap Hint again for the answer.

Its horizontal section is 4 cells long, so only 1 to 4 can fit. 2 and 3 are already in its horizontal section, and 1 in its vertical one. What's left? Tap Hint again for the answer.

Its horizontal section is 4 cells long, so only 1 to 4 can fit. 1 and 2 are already in its horizontal section, and 4 in its vertical one. What's left? Tap Hint again for the answer.

Its horizontal section is 4 cells long, so only 1 to 4 can fit. 1 and 4 are already in its horizontal section, and 2 in its vertical one. What's left? Tap Hint again for the answer.

Its horizontal section is 4 cells long, so only 1 to 4 can fit. 2 and 4 are already in its horizontal section, and 1 in its vertical one. What's left? Tap Hint again for the answer.

Its horizontal section is 4 cells long, so only 1 to 4 can fit. 1 is already in its horizontal section, and 2 and 3 in its vertical one. What's left? Tap Hint again for the answer.

Its horizontal section is 4 cells long, so only 1 to 4 can fit. 2 is already in its horizontal section, and 1 and 3 in its vertical one. What's left? Tap Hint again for the answer.