Rectangles
from Simon Tatham's Portable Puzzle Collection
Sorry, this Javascript puzzle doesn't seem to work in your web
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typed arrays).
These puzzles have been successfully run in Firefox 19, Chrome 26,
Internet Explorer 10 and Safari 6.
Draw lines along the grid edges to divide the grid into rectangles,
so that each rectangle contains exactly one numbered square and its
area is equal to the number written in that square.
Click and drag from one grid corner to another, or from one square
centre to another, to draw a rectangle. You can also drag along a
grid line to just draw a line at a time, or just click on a single
grid edge to draw or erase it.
Full instructions
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(last modified on Wed Jun 5 01:47:27 2013)