Overlapping Taatsu
Last updated: 2026-06-18Overlapping taatsu share a tile between two partial groups. Double ukeire means one draw advances the hand in two ways—key to wider tile efficiency.
What Is Overlap
Shapes like 3-4-5 sequences or 3-3-4-5 clusters. Whether you keep overlap depends on the discard.
Double Ukeire
One tile might:
- Complete a meld and improve another taatsu, or
- Reach tenpai via two different tiles
Theoretical ukeire often beats a single taatsu.
One-shanten discard
Heavy overlap near 3-4-4-5-6. Discard 4m for 19 tiles—maximizing ukeire by keeping overlap.
Wide shape
Many sequential tiles—near double-ukeire flow. Pair with Five-Block Theory.
In Play
Breaking overlap for a “safe” discard often costs many effective tiles. Follow Discard Strategy and preserve overlap when ukeire matters.