#71 White lines
There are 32 white squares on a chessboard. Your task is to draw a line that passes through all of the white squares only once, moving via the corners where they touch without lifting your pen off the board. The diagram shows the kind of line that is required. Start from any square you like. Can you get through all the squares with a single line? If not, then what is the smallest number of separate lines that you need?
Answer next week
#70 Taking the biscuit
Solution
Alpha should grab one digestive biscuit, leaving seven and…
