Bongard Problem #112 (solution)


Left: Points equidistant horizontally.

Right: Points equidistant vertically.

Back to problem #112

Note: If it is not evident what the above solution means, try drawing vertical lines through the points on the left side. Then the middle vertical line is at equal distances from its left and right lines. On the right, the same thing happens with horizontal lines through the points. This is one of the neatest problems in the entire collection.