LIT PLACER keeps a number only when the cell is the next free cell of the Siamese step. The square reads 8 1 6, 3 5 7, 4 9 2. Nine numbers are kept and nine neighbor offers are dropped. All eight lines sum to 15. The law sums to 15. A second run must match.
AMBER The square is the one called the Lo Shu. The river legend is assigned.
WALL This page builds one square of order 3. It does not build the order-7 cube, and the lines here are not asked to share the sum 1204.
MODEL One pupil. The stage is the square the pupil filled. A number is kept only on the Siamese cell. No cartridge is loaded.
Checking the teller.
Seal sha256(name|slug|blurb): 35e810cc37c1180d470dd34a529c3f4e0f4bc977e0e3eda96bc4d1ec706147f1