Terrazzo hints for Sunday, September 20, 2026

Today's subject comes from history.

The caption reads: “Europe's finest red was made of insects, and Spain kept it secret.”

You place 10 stones into a frame of 60 cells. Every cell is filled exactly once.

• Kinship. Same-coloured stones that touch make a region. Today: gold forms 3 separate regions of 13, 3, 2; lapis blue forms 4 separate regions of 6, 5, 4, 2; moss green forms 6 separate regions of 5, 5, 1, 1, 1, 1; terracotta forms 3 separate regions of 5, 5, 1.
• Solitude. No two sun cells may touch, not even corner to corner.
• The Vein. The vein cells must form one unbroken path between the frame's two notches, with no branches and no loops.

Start with the largest region the Laws name: it has the fewest ways to fit.

Cochineal

On the paddles of prickly pear cactus lives a small grey scale insect whose body is full of carminic acid. Crush it and you get a red of extraordinary intensity — ten times stronger than the European alternative. It took seventy thousand insects to make a pound. After the conquest of Mexico, cochineal became Spain's second most valuable export after silver, and the crown protected the secret so fiercely that European naturalists argued for two centuries over whether the imported grains were a seed, a berry, or a worm. Redcoats, cardinals' robes and Turner's sunsets all owe their colour to a cactus parasite.