

A medieval castle with towering turrets, pennant flags and a surrounding stone wall, drawn in black and navy ink on plain white. The three tall towers with their grated windows and pointed roofs hide the finder squares. The central keep is packed with stacked masonry blocks, arched windows and shadowed recesses that carry the dark and light modules. Heavy black fills against bare white paper keep the pattern crisp, while fine hatching on the lower wall adds texture without breaking up the code.