Nonogram

How to play Nonogram

A nonogram is a grid of squares to fill in. The numbers beside each row and above each column tell you how the filled squares fall in that line. Fill the right squares and a picture or pattern appears. The 10 by 10 puzzles start with real pictures.

• Each number is a run of filled squares, side by side. "3 1" means a run of three, then a run of one, in that order.
• Between two runs there is always at least one empty square. There can be empty squares at the ends too.
• A 0 means the whole line is empty.
• Choose Fill, then tap a square to fill it. Tap it again to clear it.
• Choose Cross out to mark a square you know is empty. Crosses are only notes for you, so they never count against you.
• With a mouse, you can drag along a row or column to fill or cross out several squares at once.
• A row's or column's numbers turn grey when that line matches them.
• The puzzle is solved when every filled square is right.

Choose a size above the grid: Easy is 5 by 5, Medium 10 by 10 and Hard 15 by 15. Check marks any wrong squares with a red dashed outline. Hint fills in a square you can work out next, and takes out a square you've filled by mistake. Undo and Redo have no limit.

Tips

• Start with the big numbers. In a row of 10, a run of 7 must cover the middle 4 squares, wherever it starts.
• Add the numbers and the gaps. In a row of 10, "4 5" needs 4 + 1 + 5 = 10 squares, so the whole row is settled.
• Cross out squares as soon as you know they're empty. Those crosses often settle the column that crosses them.
• Work back and forth between rows and columns: each square you settle in one helps in the other.

Keyboard

Arrow keys move between squares. Space or Enter uses the chosen tool, F fills and X crosses out. Delete clears a square. Ctrl+Z undoes and Ctrl+Y redoes.