A practical guide to the 64 I Ching hexagrams as six-line binary structures, two-trigram combinations, and King Wen sequence entries.
Each line has two basic states: yin or yang. Six positions, read bottom-to-top, produce 2^6 possible structures. That is the mathematical skeleton of the 64 hexagrams.
The lower three lines form the lower trigram; the upper three lines form the upper trigram. Eight trigrams stacked in pairs make 8 x 8 = 64 combinations. Hexagram Cast shows trigram composition, sequence, and binary structure on each archive page.
Lines 1, 2, and 3: the lower half of the structure.
Lines 4, 5, and 6: the upper half of the structure.
The Hexagram Cast archive follows the received King Wen sequence while preserving structural fields such as trigram composition, nuclear hexagram, opposite hexagram, and inverse hexagram. You can read traditionally or inspect structurally.