Chess Paint In Town

Chess boy is a kid who has no other interests than chess,painting and his cat. The only bad thing is that the only thing he paints is the pattern of a chessboard.

It was pretty fun to draw no with only black and white, kind of challenging as I figured I would not let myself use other tools than just my black pens.
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Tools; Black Pens in different sizes and a ruler :3 _{(and of course, pencil for the sketch)}
Time; About 10 hours or so.