2026-10-23
The puzzles now come in fabric form. shop.sumrace.com is live — print-on-demand tees and hoodies carrying the same maths that runs the games. No slogans, no mascots, just the actual objects: magic squares, sequences, binary.
Lo Shu — the 3×3 magic square, roughly 4,000 years old, every line summing to 15. Sierpinski — Pascal's triangle mod 2, the fractal that was hiding in arithmetic all along. 0101 and binary band — for anyone who counts in 1s and 0s without being asked. 2ⁿ − 1 — the Hanoi constant, also known as the answer to "how many moves?"
The newer additions lean harder into the visual side: a Fibonacci pyramid grown one term at a time, e^iπ + 1 = 0 (Euler's identity — the E=MC² of pure maths), the Pythagoras squares-on-triangle diagram, and a Gray code ring — the same one-bit-at-a-time sequence that orders an optimal Hanoi solve, with a Σ in the middle, because sum.
Every design gets exactly one ink colour — black or white — and the garment palette follows the physics of contrast: dark ink on light fabric, light ink on dark. Five colours per product, curated, because a black logo on a black hoodie is just an expensive plain hoodie. The catalog enforces it automatically, which means you can't accidentally order an invisible print.
Orders are printed and shipped by a third party, payments run through a secure hosted checkout, and placement varies — some designs hit the chest, most hoodies carry the print on the back. ships worldwide, flat $4.99 shipping, free over $75.
Browse it at shop.sumrace.com — then get back to today's Daily Set.