Four Pure Shifted Chows (一色四步高)
Four chows in the same suit shifted by one or two ranks (e.g., 1-2-3, 2-3-4, 3-4-5, 4-5-6 of manzu).
How Four Pure Shifted Chows (一色四步高) works
Four chows in the same suit whose starting values each shift up by a fixed step of one or two, forming a staircase of sequences.
All four chows are in one suit and step upward by a constant interval — either +1 (e.g. 123, 234, 345, 456) or +2 (e.g. 123, 345, 567, 789). The fixed shift across all four runs is what defines the pattern. Being single-suit, it carries flush-related interactions, and its chow-only structure excludes any pung-based fan within those sets.
- •The step between consecutive chows must be constant — all +1 or all +2.
- •All four chows must be in the same suit.
- •Distinct from Four Pure Shifted Pungs, which shifts triplets rather than sequences.
Four Pure Shifted Chows (一色四步高) — FAQ
Can the shift be +1 for some chows and +2 for others?
No. The shift must be the same across all four chows — uniformly one step or uniformly two steps.
Does it require a flush?
All four chows are in one suit, but the pair may be of any tile, so it is not necessarily a complete one-suit hand.