Yakuman
Open or closed
Difficulty: ★★★★★
Requirement:
- Hand contains only 1s and 9s
Origin & Trivia:
“Old heads” refers to the edge numbers of the numerical sequence. Terminals were historically considered
distinguished or “venerable” tiles. A hand composed solely of the ancient extremes symbolizes purity through
simplicity — the elegance of using only the beginning and the end.