This is especially useful if you’re down to two options when guessing the location of a shaded cell.

Use the query button to check your answers if you’re stuck.

One wrong guess can throw off your entire solution and force you to start over.

Do not rely solely on random guesswork.

The cells you are certain of being black can then be used along with clues in the orthogonal direction to work the puzzle in the other direction.

For example, if a 10×10 puzzle shows an 8 you know the center 6 cells in that row or column are black (without immediately being certain of the distribution of the final 2 black cells among the 4 outer cells in that row or column).

Start with the rows or columns with the most black cells in them as you can mark the center portion of a long string of black cells without knowing where the precise edges of the run are.

Mark a cell as a black square only if you’re sure of your answers.

As a rule, mark each white cell on the grid with an X if you are sure it is not black.

As an X (which is a way of stating you are certain the cell is not black).

This represents a row or column that has groups of shaded squares separated by at least 1 blank square.

Many of the rows and columns have hints that shows 2 or even 3 numbers.

Every number represents the number of shaded squares on the row or column.

Use the numbers on the left and top side of the grid to identify the location of the shaded squares.

Find the location of the shaded squares on the grid.

Enlarge: Lets you switch between full screen and windowed modes.

Sound: Turns the game’s audio effects on and off.

Music: Turns the game’s music on and off.

Query: Checks if your current answers are correct.

The game’s main indicators are situated on the left side of the screen.

Tap on the screen with your fingers to mark a tile.

Select tiles once to mark them black, twice to put an X in them, and a third time if you want to unmark the tile and put it back to the original white state.

With your mouse, left click to mark a tile.Your web browser automatically saves your game progress.Choose the game’s language from the drop-down list on the bottom left corner of the screen:.

Select Help to learn how to play the game.To begin, choose a difficulty level at the center of the welcome screen.Identify the location of the shaded squares using the

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