Visual Bongard Problems where stretching (or compressing) any sorted example renders the example unsortable vs. visual Bongard Problems where some example can be stretched along some axis and remain sorted.

Bongard Problems where stretching (or compressing) any sorted example renders the example unsortable vs. Bongard Problems where some example can be stretched along some axis and remain sorted.

Left-sorted Problems often have a specific format or deal with specific geometric shapes.

Almost any Problem that sorts the all-white or all-black panels will be sorted right.

Leo Crabbe