A Sikaku puzzle consists of a square or rectangular grid in which some of the cells contain a one or two digit number. To complete the puzzle, a Solver must divide the puzzle into a number of rectangles so that each rectangle contains exactly one of the numbers, and that number must be equal to the area of the rectangle which contains it. Solving the puzzle is a purely mouse operation. When you have determined where one of the rectangles must be located, mouse click into one of the corner cells of the rectangle, and drag to the cell in the opposite corner. A red outline will show you the rectangle you have selected in this way. When you release the mouse, the outline of the selected rectangle will change to black. If you make a mistake, you can remove individual segments of the outline of a rectangle by pointing to any point near the center of that segment and clicking the mouse.

The higher the number of the puzzle, the more challenging it is. Click here to see the solution to Sikaku 1, the easiest one, here.

Important note for Mac users: In order to print your answer, move the Congratulations message to the side so that you can see your answer. Then hit Shift-cmd-4, and draw a box around your answer and the Congratulations message. A picture file of your answer will appear on your desktop, which you can open and print. If you close the window without taking a screenshot, you will not be able to see your solution again.

For PC users: First, locate the Prnt Scrn (SysRq) button on your keyboard.
Then get to the window you want to take a shot of.
If you want to take a shot of the whole screen, just press the Prnt Scrn button. If you want to take the window alone, press Alt and while holding the Alt key, press Prnt Scrn.
Go into Paint, in the start menu and click run. Type in mspaint.
Press Ctrl+V and then save the file. Done!