Overlapping Taatsu | Double Ukeire Patterns
DocumentationOverlapping Taatsu | Double Ukeire Patterns

Author: MJ Lab

Overlapping Taatsu

Last updated: 2026-06-18

Overlapping 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.

Feel overlap in discard drills

Repeated puzzles with compound taatsu build double-ukeire intuition.Open discard training